#
fdafd315 |
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24-Nov-2023 |
Warner Losh <imp@FreeBSD.org> |
sys: Automated cleanup of cdefs and other formatting Apply the following automated changes to try to eliminate no-longer-needed sys/cdefs.h includes as well as now-empty blank lines in a row. Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/ Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/ Remove /\n+#if.*\n#endif.*\n+/ Remove /^#if.*\n#endif.*\n/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/ Sponsored by: Netflix
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#
29363fb4 |
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23-Nov-2023 |
Warner Losh <imp@FreeBSD.org> |
sys: Remove ancient SCCS tags. Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
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685dc743 |
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16-Aug-2023 |
Warner Losh <imp@FreeBSD.org> |
sys: Remove $FreeBSD$: one-line .c pattern Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
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#
c6d31b83 |
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18-Jul-2022 |
Konstantin Belousov <kib@FreeBSD.org> |
AST: rework Make most AST handlers dynamically registered. This allows to have subsystem-specific handler source located in the subsystem files, instead of making subr_trap.c aware of it. For instance, signal delivery code on return to userspace is now moved to kern_sig.c. Also, it allows to have some handlers designated as the cleanup (kclear) type, which are called both at AST and on thread/process exit. For instance, ast(), exit1(), and NFS server no longer need to be aware about UFS softdep processing. The dynamic registration also allows third-party modules to register AST handlers if needed. There is one caveat with loadable modules: the code does not make any effort to ensure that the module is not unloaded before all threads processed through AST handler in it. In fact, this is already present behavior for hwpmc.ko and ufs.ko. I do not think it is worth the efforts and the runtime overhead to try to fix it. Reviewed by: markj Tested by: emaste (arm64), pho Discussed with: jhb Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D35888
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#
aa3ea612 |
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31-Mar-2021 |
Konstantin Belousov <kib@FreeBSD.org> |
x86: remove gcov kernel support Reviewed by: jhb Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D29529
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#
7029da5c |
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26-Feb-2020 |
Pawel Biernacki <kaktus@FreeBSD.org> |
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are still not MPSAFE (or already are but aren’t properly marked). Use it in preparation for a general review of all nodes. This is non-functional change that adds annotations to SYSCTL_NODE and SYSCTL_PROC nodes using one of the soon-to-be-required flags. Mark all obvious cases as MPSAFE. All entries that haven't been marked as MPSAFE before are by default marked as NEEDGIANT Approved by: kib (mentor, blanket) Commented by: kib, gallatin, melifaro Differential Revision: https://reviews.freebsd.org/D23718
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#
b8d908b7 |
|
01-Jun-2018 |
Ed Maste <emaste@FreeBSD.org> |
ANSIfy sys/kern
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#
cee61c8c |
|
17-Apr-2018 |
Brooks Davis <brooks@FreeBSD.org> |
Stop using fuswintr() and suswintr() in the profiler. Always take the AST path rather than calling MD functions which are often implemented as always failing. The is the case on amd64, arm, i386, and powerpc. This optimization (inherited from 4.4 Lite) is a pessimization on those architectures and is the sole use of these functions. They will be removed in a seperate commit. Reviewed by: kib Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D15101
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#
51369649 |
|
20-Nov-2017 |
Pedro F. Giffuni <pfg@FreeBSD.org> |
sys: further adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
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#
69a28758 |
|
15-Sep-2016 |
Ed Maste <emaste@FreeBSD.org> |
Renumber license clauses in sys/kern to avoid skipping #3
|
#
e3043798 |
|
29-Apr-2016 |
Pedro F. Giffuni <pfg@FreeBSD.org> |
sys/kern: spelling fixes in comments. No functional change.
|
#
5c7bebf9 |
|
26-Nov-2014 |
Konstantin Belousov <kib@FreeBSD.org> |
The process spin lock currently has the following distinct uses: - Threads lifetime cycle, in particular, counting of the threads in the process, and interlocking with process mutex and thread lock. The main reason of this is that turnstile locks are after thread locks, so you e.g. cannot unlock blockable mutex (think process mutex) while owning thread lock. - Virtual and profiling itimers, since the timers activation is done from the clock interrupt context. Replace the p_slock by p_itimmtx and PROC_ITIMLOCK(). - Profiling code (profil(2)), for similar reason. Replace the p_slock by p_profmtx and PROC_PROFLOCK(). - Resource usage accounting. Need for the spinlock there is subtle, my understanding is that spinlock blocks context switching for the current thread, which prevents td_runtime and similar fields from changing (updates are done at the mi_switch()). Replace the p_slock by p_statmtx and PROC_STATLOCK(). The split is done mostly for code clarity, and should not affect scalability. Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week
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#
0436fcb8 |
|
10-Nov-2014 |
Konstantin Belousov <kib@FreeBSD.org> |
When sleeping waiting for the profiling stop, always set P_STOPPROF before dropping process lock. Clear P_STOPPROF when doing wakeup. Both issues caused thread to hang in stopprofclock() "stopprof" sleep. Reported and tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week
|
#
0067051f |
|
20-Oct-2014 |
Marcel Moolenaar <marcel@FreeBSD.org> |
Fully support constructors for the purpose of code coverage analysis. This involves: 1. Have the loader pass the start and size of the .ctors section to the kernel in 2 new metadata elements. 2. Have the linker backends look for and record the start and size of the .ctors section in dynamically loaded modules. 3. Have the linker backends call the constructors as part of the final work of initializing preloaded or dynamically loaded modules. Note that LLVM appends the priority of the constructors to the name of the .ctors section. Not so when compiling with GCC. The code currently works for GCC and not for LLVM. Submitted by: Dmitry Mikulin <dmitrym@juniper.net> Obtained from: Juniper Networks, Inc.
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#
6472ac3d |
|
07-Nov-2011 |
Ed Schouten <ed@FreeBSD.org> |
Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. The SYSCTL_NODE macro defines a list that stores all child-elements of that node. If there's no SYSCTL_DECL macro anywhere else, there's no reason why it shouldn't be static.
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#
8451d0dd |
|
16-Sep-2011 |
Kip Macy <kmacy@FreeBSD.org> |
In order to maximize the re-usability of kernel code in user space this patch modifies makesyscalls.sh to prefix all of the non-compatibility calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel entry points and all places in the code that use them. It also fixes an additional name space collision between the kernel function psignal and the libc function of the same name by renaming the kernel psignal kern_psignal(). By introducing this change now we will ease future MFCs that change syscalls. Reviewed by: rwatson Approved by: re (bz)
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#
a7d5f7eb |
|
19-Oct-2010 |
Jamie Gritton <jamie@FreeBSD.org> |
A new jail(8) with a configuration file, to replace the work currently done by /etc/rc.d/jail.
|
#
1a996ed1 |
|
18-Jul-2010 |
Edward Tomasz Napierala <trasz@FreeBSD.org> |
Revert r210225 - turns out I was wrong; the "/*-" is not license-only thing; it's also used to indicate that the comment should not be automatically rewrapped. Explained by: cperciva@
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#
805cc58a |
|
18-Jul-2010 |
Edward Tomasz Napierala <trasz@FreeBSD.org> |
The "/*-" comment marker is supposed to denote copyrights. Remove non-copyright occurences from sys/sys/ and sys/kern/.
|
#
bada7287 |
|
03-Feb-2009 |
Warner Losh <imp@FreeBSD.org> |
Use ANSI function definition for profil.
|
#
d7f03759 |
|
19-Oct-2008 |
Ulf Lilleengen <lulf@FreeBSD.org> |
- Import the HEAD csup code which is the basis for the cvsmode work.
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#
237fdd78 |
|
16-Mar-2008 |
Robert Watson <rwatson@FreeBSD.org> |
In keeping with style(9)'s recommendations on macros, use a ';' after each SYSINIT() macro invocation. This makes a number of lightweight C parsers much happier with the FreeBSD kernel source, including cflow's prcc and lxr. MFC after: 1 month Discussed with: imp, rink
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#
982d11f8 |
|
04-Jun-2007 |
Jeff Roberson <jeff@FreeBSD.org> |
Commit 14/14 of sched_lock decomposition. - Use thread_lock() rather than sched_lock for per-thread scheduling sychronization. - Use the per-process spinlock rather than the sched_lock for per-process scheduling synchronization. Tested by: kris, current@ Tested on: i386, amd64, ULE, 4BSD, libthr, libkse, PREEMPTION, etc. Discussed with: kris, attilio, kmacy, jhb, julian, bde (small parts each)
|
#
8b98fec9 |
|
20-May-2007 |
Jeff Roberson <jeff@FreeBSD.org> |
- Move clock synchronization into a seperate clock lock so the global scheduler lock is not involved. sched_lock still protects the sched_clock call. Another patch will remedy this. Contributed by: Attilio Rao <attilio@FreeBSD.org> Tested by: kris, jeff
|
#
0c14ff0e |
|
04-Mar-2007 |
Robert Watson <rwatson@FreeBSD.org> |
Remove 'MPSAFE' annotations from the comments above most system calls: all system calls now enter without Giant held, and then in some cases, acquire Giant explicitly. Remove a number of other MPSAFE annotations in the credential code and tweak one or two other adjacent comments.
|
#
cb49fcd1 |
|
16-Dec-2005 |
John Baldwin <jhb@FreeBSD.org> |
Change the addupc_*() functions to use the uintfptr_t type for pc rather than uintptr_t as that is technically more correct.
|
#
a5f50ef9 |
|
02-Mar-2005 |
Joerg Wunsch <joerg@FreeBSD.org> |
netchild's mega-patch to isolate compiler dependencies into a central place. This moves the dependency on GCC's and other compiler's features into the central sys/cdefs.h file, while the individual source files can then refer to #ifdef __COMPILER_FEATURE_FOO where they by now used to refer to #if __GNUC__ > 3.1415 && __BARC__ <= 42. By now, GCC and ICC (the Intel compiler) have been actively tested on IA32 platforms by netchild. Extension to other compilers is supposed to be possible, of course. Submitted by: netchild Reviewed by: various developers on arch@, some time ago
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#
52eb8464 |
|
16-Jul-2004 |
John Baldwin <jhb@FreeBSD.org> |
- Move TDF_OWEPREEMPT, TDF_OWEUPC, and TDF_USTATCLOCK over to td_pflags since they are only accessed by curthread and thus do not need any locking. - Move pr_addr and pr_ticks out of struct uprof (which is per-process) and directly into struct thread as td_profil_addr and td_profil_ticks as these variables are really per-thread. (They are used to defer an addupc_intr() that was too "hard" until ast()).
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#
a3a70178 |
|
01-Jul-2004 |
John Baldwin <jhb@FreeBSD.org> |
Tidy up uprof locking. Mostly the fields are protected by both the proc lock and sched_lock so they can be read with either lock held. Document the locking as well. The one remaining bogosity is that pr_addr and pr_ticks should be per-thread but profiling of multithreaded apps is currently undefined.
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#
7671b766 |
|
28-May-2004 |
Tim J. Robbins <tjr@FreeBSD.org> |
Enable MI bits for gcc -ftest-coverage -fprofile-arcs on amd64.
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#
372c2e96 |
|
20-May-2004 |
Bruce Evans <bde@FreeBSD.org> |
Fixed printf format errors which helped break GUPROF for arches with 64-bit function pointers.
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#
c81d4a03 |
|
20-May-2004 |
Bruce Evans <bde@FreeBSD.org> |
Initialize the history counter type field in struct gmonparam as threatened in rev.1.10 of usr.sbin/kgmon/kgmon.c more than 2 years ago. kgmon has been recovering from the missing initialization for too long, but the fixup there is ifdefed for i386's and shouldn't be needed for other arches.
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#
e77c22bf |
|
20-May-2004 |
Bruce Evans <bde@FreeBSD.org> |
Moved i386 asms to an i386 header. The asms are for calibration of high resolution kernel profiling (options GUPROF. "U" in GUPROF stands for microseconds resolution, but the resolution is now smaller than 1 nanosecond on multi-GHz machines and the accuracy is heading towards 1 nanosecond too). Arches that support GUPROF must now provide certain macros for the calibration. GUPROF is now only supported for i386's, so the absence of the new macros for other arches doesn't break anything that wasn't already broken. amd64's have uncommitted support for GUPROF, and sparc64's have support that seems to be complete except here (there was an #error for non-i386 cases; now there are undefined macros). Changed the asms a little: - declare them as __volatile. They must not be moved, and exporting a label across asms is technically incorrect, so try harder to stop gcc moving them. - don't put the non-clobbered register "bx" in the clobber list. The clobber lists are still more conservative than necessary. - drop the non-support for gcc-1. It just gave a better error message, and this is not useful since compiling with gcc-1 would cause thousands of worse error messages. - drop the support for aout.
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#
7f8a436f |
|
05-Apr-2004 |
Warner Losh <imp@FreeBSD.org> |
Remove advertising clause from University of California Regent's license, per letter dated July 22, 1999. Approved by: core
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#
a122cca9 |
|
12-Mar-2004 |
Tom Rhodes <trhodes@FreeBSD.org> |
These are changes to allow to use the Intel C/C++ compiler (lang/icc) to build the kernel. It doesn't affect the operation if gcc. Most of the changes are just adding __INTEL_COMPILER to #ifdef's, as icc v8 may define __GNUC__ some parts may look strange but are necessary. Additional changes: - in_cksum.[ch]: * use a generic C version instead of the assembly version in the !gcc case (ASM code breaks with the optimizations icc does) -> no bad checksums with an icc compiled kernel Help from: andre, grehan, das Stolen from: alpha version via ppc version The entire checksum code should IMHO be replaced with the DragonFly version (because it isn't guaranteed future revisions of gcc will include similar optimizations) as in: ---snip--- Revision Changes Path 1.12 +1 -0 src/sys/conf/files.i386 1.4 +142 -558 src/sys/i386/i386/in_cksum.c 1.5 +33 -69 src/sys/i386/include/in_cksum.h 1.5 +2 -0 src/sys/netinet/igmp.c 1.6 +0 -1 src/sys/netinet/in.h 1.6 +2 -0 src/sys/netinet/ip_icmp.c 1.4 +3 -4 src/contrib/ipfilter/ip_compat.h 1.3 +1 -2 src/sbin/natd/icmp.c 1.4 +0 -1 src/sbin/natd/natd.c 1.48 +1 -0 src/sys/conf/files 1.2 +0 -1 src/sys/conf/files.amd64 1.13 +0 -1 src/sys/conf/files.i386 1.5 +0 -1 src/sys/conf/files.pc98 1.7 +1 -1 src/sys/contrib/ipfilter/netinet/fil.c 1.10 +2 -3 src/sys/contrib/ipfilter/netinet/ip_compat.h 1.10 +1 -1 src/sys/contrib/ipfilter/netinet/ip_fil.c 1.7 +1 -1 src/sys/dev/netif/txp/if_txp.c 1.7 +1 -1 src/sys/net/ip_mroute/ip_mroute.c 1.7 +1 -2 src/sys/net/ipfw/ip_fw2.c 1.6 +1 -2 src/sys/netinet/igmp.c 1.4 +158 -116 src/sys/netinet/in_cksum.c 1.6 +1 -1 src/sys/netinet/ip_gre.c 1.7 +1 -2 src/sys/netinet/ip_icmp.c 1.10 +1 -1 src/sys/netinet/ip_input.c 1.10 +1 -2 src/sys/netinet/ip_output.c 1.13 +1 -2 src/sys/netinet/tcp_input.c 1.9 +1 -2 src/sys/netinet/tcp_output.c 1.10 +1 -1 src/sys/netinet/tcp_subr.c 1.10 +1 -1 src/sys/netinet/tcp_syncache.c 1.9 +1 -2 src/sys/netinet/udp_usrreq.c 1.5 +1 -2 src/sys/netinet6/ipsec.c 1.5 +1 -2 src/sys/netproto/ipsec/ipsec.c 1.5 +1 -1 src/sys/netproto/ipsec/ipsec_input.c 1.4 +1 -2 src/sys/netproto/ipsec/ipsec_output.c and finally remove sys/i386/i386 in_cksum.c sys/i386/include in_cksum.h ---snip--- - endian.h: * DTRT in C++ mode - quad.h: * we don't use gcc v1 anymore, remove support for it Suggested by: bde (long ago) - assym.h: * avoid zero-length arrays (remove dependency on a gcc specific feature) This change changes the contents of the object file, but as it's only used to generate some values for a header, and the generator knows how to handle this, there's no impact in the gcc case. Explained by: bde Submitted by: Marius Strobl <marius@alchemy.franken.de> - aicasm.c: * minor change to teach it about the way icc spells "-nostdinc" Not approved by: gibbs (no reply to my mail) - bump __FreeBSD_version (lang/icc needs to know about the changes) Incarnations of this patch survive gcc compiles since a loooong time, I use it on my desktop. An icc compiled kernel works since Nov. 2003 (exceptions: snd_* if used as modules), it survives a build of the entire ports collection with icc. Parts of this commit contains suggestions or submissions from Marius Strobl <marius@alchemy.franken.de>. Reviewed by: -arch Submitted by: netchild
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#
677b542e |
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10-Jun-2003 |
David E. O'Brien <obrien@FreeBSD.org> |
Use __FBSDID().
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#
13652e95 |
|
01-May-2003 |
Julian Elischer <julian@FreeBSD.org> |
remove old and inaccurate XXX comment.
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#
9752f794 |
|
22-Apr-2003 |
John Baldwin <jhb@FreeBSD.org> |
- Move PS_PROFIL and its new cousin PS_STOPPROF back over to p_flag and rename them appropriately. Protect both flags with both the proc lock and the sched_lock. - Protect p_profthreads with the proc lock. - Remove Giant from profil(2).
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#
a163d034 |
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18-Feb-2003 |
Warner Losh <imp@FreeBSD.org> |
Back out M_* changes, per decision of the TRB. Approved by: trb
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#
4a338afd |
|
17-Feb-2003 |
Julian Elischer <julian@FreeBSD.org> |
Move a bunch of flags from the KSE to the thread. I was in two minds as to where to put them in the first case.. I should have listenned to the other mind. Submitted by: parts by davidxu@ Reviewed by: jeff@ mini@
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#
a282253a |
|
07-Feb-2003 |
Julian Elischer <julian@FreeBSD.org> |
A little infrastructure, preceding some upcoming changes to the profiling and statistics code. Submitted by: DavidXu@ Reviewed by: peter@
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#
6f8132a8 |
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31-Jan-2003 |
Julian Elischer <julian@FreeBSD.org> |
Reversion of commit by Davidxu plus fixes since applied. I'm not convinced there is anything major wrong with the patch but them's the rules.. I am using my "David's mentor" hat to revert this as he's offline for a while.
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#
0dbb100b |
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26-Jan-2003 |
David Xu <davidxu@FreeBSD.org> |
Move UPCALL related data structure out of kse, introduce a new data structure called kse_upcall to manage UPCALL. All KSE binding and loaning code are gone. A thread owns an upcall can collect all completed syscall contexts in its ksegrp, turn itself into UPCALL mode, and takes those contexts back to userland. Any thread without upcall structure has to export their contexts and exit at user boundary. Any thread running in user mode owns an upcall structure, when it enters kernel, if the kse mailbox's current thread pointer is not NULL, then when the thread is blocked in kernel, a new UPCALL thread is created and the upcall structure is transfered to the new UPCALL thread. if the kse mailbox's current thread pointer is NULL, then when a thread is blocked in kernel, no UPCALL thread will be created. Each upcall always has an owner thread. Userland can remove an upcall by calling kse_exit, when all upcalls in ksegrp are removed, the group is atomatically shutdown. An upcall owner thread also exits when process is in exiting state. when an owner thread exits, the upcall it owns is also removed. KSE is a pure scheduler entity. it represents a virtual cpu. when a thread is running, it always has a KSE associated with it. scheduler is free to assign a KSE to thread according thread priority, if thread priority is changed, KSE can be moved from one thread to another. When a ksegrp is created, there is always N KSEs created in the group. the N is the number of physical cpu in the current system. This makes it is possible that even an userland UTS is single CPU safe, threads in kernel still can execute on different cpu in parallel. Userland calls kse_create to add more upcall structures into ksegrp to increase concurrent in userland itself, kernel is not restricted by number of upcalls userland provides. The code hasn't been tested under SMP by author due to lack of hardware. Reviewed by: julian
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#
44956c98 |
|
21-Jan-2003 |
Alfred Perlstein <alfred@FreeBSD.org> |
Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0. Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
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#
c49bddce |
|
07-Jan-2003 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Fix warnings & errors caused by my last commit.
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#
578c4786 |
|
06-Jan-2003 |
Poul-Henning Kamp <phk@FreeBSD.org> |
This is all "#if defined(__i386__) && __GNUC__ >= 2": Add support for GCC's --test-coverage --profile-arcs options. Add code to call the functions listed in the .ctors section, these are used to string the per .o file counter blocks into a linked list. Add empty __bb_fork_func() to cope with GCC magic gandling of exec*() named functions. To add support for other platforms should be trivial, but involves determining the exact data-types gcc uses on that platform.
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#
fa15abd8 |
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01-Oct-2002 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Don't #error if we are lint.
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#
01609114 |
|
28-Jun-2002 |
Alfred Perlstein <alfred@FreeBSD.org> |
more caddr_t removal.
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#
4d77a549 |
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19-Mar-2002 |
Alfred Perlstein <alfred@FreeBSD.org> |
Remove __P.
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#
48fd1f38 |
|
18-Dec-2001 |
John Baldwin <jhb@FreeBSD.org> |
- Change all callers of addupc_task() to check PS_PROFIL explicitly and remove the check from addupc_task(). It would need sched_lock while testing the flag anyways. - Always read sticks while holding sched_lock using a temporary variable where needed. - Always init prticks to 0 in ast() to quiet a warning.
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#
7e1f6dfe |
|
17-Dec-2001 |
John Baldwin <jhb@FreeBSD.org> |
Modify the critical section API as follows: - The MD functions critical_enter/exit are renamed to start with a cpu_ prefix. - MI wrapper functions critical_enter/exit maintain a per-thread nesting count and a per-thread critical section saved state set when entering a critical section while at nesting level 0 and restored when exiting to nesting level 0. This moves the saved state out of spin mutexes so that interlocking spin mutexes works properly. - Most low-level MD code that used critical_enter/exit now use cpu_critical_enter/exit. MI code such as device drivers and spin mutexes use the MI wrappers. Note that since the MI wrappers store the state in the current thread, they do not have any return values or arguments. - mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is assigned to curthread->td_savecrit during fork_exit(). Tested on: i386, alpha
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#
4a44bd4b |
|
30-Oct-2001 |
Brian Feldman <green@FreeBSD.org> |
Add kmupetext(), a function that expands the range of memory covered by the profiler on a running system. This is not done sparsely, as memory is cheaper than processor speed and each gprof mcount() and mexitcount() operation is already very expensive. Obtained from: NAI Labs CBOSS project Funded by: DARPA
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#
b40ce416 |
|
12-Sep-2001 |
Julian Elischer <julian@FreeBSD.org> |
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
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#
6f1e8c18 |
|
31-Aug-2001 |
Matthew Dillon <dillon@FreeBSD.org> |
Pushdown Giant for: profil(), ntp_adjtime(), ogethostname(), osethostname(), ogethostid(), osethostid()
|
#
688ebe12 |
|
10-Aug-2001 |
John Baldwin <jhb@FreeBSD.org> |
- Close races with signals and other AST's being triggered while we are in the process of exiting the kernel. The ast() function now loops as long as the PS_ASTPENDING or PS_NEEDRESCHED flags are set. It returns with preemption disabled so that any further AST's that arrive via an interrupt will be delayed until the low-level MD code returns to user mode. - Use u_int's to store the tick counts for profiling purposes so that we do not need sched_lock just to read p_sticks. This also closes a problem where the call to addupc_task() could screw up the arithmetic due to non-atomic reads of p_sticks. - Axe need_proftick(), aston(), astoff(), astpending(), need_resched(), clear_resched(), and resched_wanted() in favor of direct bit operations on p_sflag. - Fix up locking with sched_lock some. In addupc_intr(), use sched_lock to ensure pr_addr and pr_ticks are updated atomically with setting PS_OWEUPC. In ast() we clear pr_ticks atomically with clearing PS_OWEUPC. We also do not grab the lock just to test a flag. - Simplify the handling of Giant in ast() slightly. Reviewed by: bde (mostly)
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5beb572b |
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06-Jun-2001 |
John Baldwin <jhb@FreeBSD.org> |
We don't need to hold a lock just to test a flag.
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8bd57f8f |
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15-May-2001 |
John Baldwin <jhb@FreeBSD.org> |
Remove unneeded includes of sys/ipl.h and machine/ipl.h.
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fb919e4d |
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01-May-2001 |
Mark Murray <markm@FreeBSD.org> |
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in other "system" header files. Also help the deprecation of lockmgr.h by making it a sub-include of sys/lock.h and removing sys/lockmgr.h form kernel .c files. Sort sys/*.h includes where possible in affected files. OK'ed by: bde (with reservations)
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0006681f |
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27-Mar-2001 |
John Baldwin <jhb@FreeBSD.org> |
Switch from save/disable/restore_intr() to critical_enter/exit().
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51c91299 |
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22-Feb-2001 |
John Baldwin <jhb@FreeBSD.org> |
Since the PC is a pointer to a code address, change the second parameter of addupc_task() and addupc_intr() to be a uintptr_t instead of a u_long.
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9ed346ba |
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08-Feb-2001 |
Bosko Milekic <bmilekic@FreeBSD.org> |
Change and clean the mutex lock interface. mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order)
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ec5a741d |
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24-Jan-2001 |
John Baldwin <jhb@FreeBSD.org> |
- Catch up to proc flag changes.
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7cc0979f |
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08-Dec-2000 |
David Malone <dwmalone@FreeBSD.org> |
Convert more malloc+bzero to malloc+M_ZERO. Submitted by: josh@zipperup.org Submitted by: Robert Drehmel <robd@gmx.net>
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5e1aea9f |
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07-Dec-2000 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Hide intrstate in the #ifdef where it belongs.
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35e0e5b3 |
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20-Oct-2000 |
John Baldwin <jhb@FreeBSD.org> |
Catch up to moving headers: - machine/ipl.h -> sys/ipl.h - machine/mutex.h -> sys/mutex.h
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0384fff8 |
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06-Sep-2000 |
Jason Evans <jasone@FreeBSD.org> |
Major update to the way synchronization is done in the kernel. Highlights include: * Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.) * Per-CPU idle processes. * Interrupts are run in their own separate kernel threads and can be preempted (i386 only). Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
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77978ab8 |
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04-Jul-2000 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. Pointed out by: bde
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82d9ae4e |
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03-Jul-2000 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Style police catches up with rev 1.26 of src/sys/sys/sysctl.h: Sanitize SYSCTL_HANDLER_ARGS so that simplistic tools can grog our sources: -sysctl_vm_zone SYSCTL_HANDLER_ARGS +sysctl_vm_zone (SYSCTL_HANDLER_ARGS)
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36e9f877 |
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28-Mar-2000 |
Matthew Dillon <dillon@FreeBSD.org> |
Commit major SMP cleanups and move the BGL (big giant lock) in the syscall path inward. A system call may select whether it needs the MP lock or not (the default being that it does need it). A great deal of conditional SMP code for various deadended experiments has been removed. 'cil' and 'cml' have been removed entirely, and the locking around the cpl has been removed. The conditional separately-locked fast-interrupt code has been removed, meaning that interrupts must hold the CPL now (but they pretty much had to anyway). Another reason for doing this is that the original separate-lock for interrupts just doesn't apply to the interrupt thread mechanism being contemplated. Modifications to the cpl may now ONLY occur while holding the MP lock. For example, if an otherwise MP safe syscall needs to mess with the cpl, it must hold the MP lock for the duration and must (as usual) save/restore the cpl in a nested fashion. This is precursor work for the real meat coming later: avoiding having to hold the MP lock for common syscalls and I/O's and interrupt threads. It is expected that the spl mechanisms and new interrupt threading mechanisms will be able to run in tandem, allowing a slow piecemeal transition to occur. This patch should result in a moderate performance improvement due to the considerable amount of code that has been removed from the critical path, especially the simplification of the spl*() calls. The real performance gains will come later. Approved by: jkh Reviewed by: current, bde (exception.s) Some work taken from: luoqi's patch
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9e420850 |
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11-Oct-1999 |
Bruce Evans <bde@FreeBSD.org> |
Unremove used includes. Bugs in test coverage should be fixed before removing any includes. LINT should be configured for full profiling support.
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d1f088da |
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11-Oct-1999 |
Peter Wemm <peter@FreeBSD.org> |
Trim unused options (or #ifdef for undoc options). Submitted by: phk
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c3aac50f |
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27-Aug-1999 |
Peter Wemm <peter@FreeBSD.org> |
$Id$ -> $FreeBSD$
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ea2b3e3d |
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06-May-1999 |
Bruce Evans <bde@FreeBSD.org> |
Fixed profiling of elf kernels. Made high resolution profiling compile for elf kernels (it is broken for all kernels due to lack of egcs support). Renaming of many assembler labels is avoided by declaring by declaring the labels that need to be visible to gprof as having type "function" and depending on the elf version of gprof being zealous about discarding the others. A few type declarations are still missing, mainly for SMP. PR: 9413 Submitted by: Assar Westerlund <assar@sics.se> (initial parts)
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134e06fe |
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05-Sep-1998 |
Bruce Evans <bde@FreeBSD.org> |
Fixed bogotification of pseudocode for syscall args by rev.1.53 of syscalls.master.
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37889b39 |
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13-Jul-1998 |
Bruce Evans <bde@FreeBSD.org> |
Changed to the C9x draft spelling of the (unsigned) integral type suitable for holding object pointers (ptrint_t -> uintptr_t). Added corresponding signed type (intptr_t). Changed/added corresponding non-C9x types for function pointers to match. Don't use nonstandard types to implement these types, and don't comment on them in <machine/types.h>.
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77849078 |
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01-May-1998 |
Bruce Evans <bde@FreeBSD.org> |
Oops, the previous commit should have changed `i386' to `__i386__', not `__i386'.
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c1087c13 |
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15-Apr-1998 |
Bruce Evans <bde@FreeBSD.org> |
Support compiling with `gcc -ansi'.
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cb226aaa |
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06-Nov-1997 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
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4090154b |
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27-Oct-1997 |
Bruce Evans <bde@FreeBSD.org> |
Moved declaration of etext from <machine/md_var.h> to <machine/cpu.h> and fixed everything that dependended on it being declared in the old place. It is used in "machine-independent" code in subr_prof.c. Moved declaration of btext from subr_prof.c to <machine/cpu.h>. It is machine-dependent.
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a1c995b6 |
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12-Oct-1997 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Last major round (Unless Bruce thinks of somthing :-) of malloc changes. Distribute all but the most fundamental malloc types. This time I also remembered the trick to making things static: Put "static" in front of them. A couple of finer points by: bde
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55166637 |
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11-Oct-1997 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Distribute and statizice a lot of the malloc M_* types. Substantial input from: bde
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6875d254 |
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22-Feb-1997 |
Peter Wemm <peter@FreeBSD.org> |
Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not ready for it yet.
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1130b656 |
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14-Jan-1997 |
Jordan K. Hubbard <jkh@FreeBSD.org> |
Make the long-awaited change from $Id$ to $FreeBSD$ This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
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e408eccf |
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12-Dec-1996 |
Bruce Evans <bde@FreeBSD.org> |
Fixed magic and wrong numbers in calibration of nullfunc_loop_profiled() and removed related debugging code. Now this part of the calibration is almost as machine-independent as gprof generally.
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d6b9e17e |
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17-Oct-1996 |
Bruce Evans <bde@FreeBSD.org> |
Improved non-statistical (GUPROF) profiling: - use a more accurate and more efficient method of compensating for overheads. The old method counted too much time against leaf functions. - normally use the Pentium timestamp counter if available. On Pentiums, the times are now accurate to within a couple of cpu clock cycles per function call in the (unlikely) event that there are no cache misses in or caused by the profiling code. - optionally use an arbitrary Pentium event counter if available. - optionally regress to using the i8254 counter. - scaled the i8254 counter by a factor of 128. Now the i8254 counters overflow slightly faster than the TSC counters for a 150MHz Pentium :-) (after about 16 seconds). This is to avoid fractional overheads. files.i386: permon.c temporarily has to be classified as a profiling-routine because a couple of functions in it may be called from profiling code. options.i386: - I586_CTR_GUPROF is currently unused (oops). - I586_PMC_GUPROF should be something like 0x70000 to enable (but not use unless prof_machdep.c is changed) support for Pentium event counters. 7 is a control mode and the counter number 0 is somewhere in the 0000 bits (see perfmon.h for the encoding). profile.h: - added declarations. - cleaned up separation of user mode declarations. prof_machdep.c: Mostly clock-select changes. The default clock can be changed by editing kmem. There should be a sysctl for this. subr_prof.c: - added copyright. - calibrate overheads for the new method. - documented new method. - fixed races and and machine dependencies in start/stop code. mcount.c: Use the new overhead compensation method. gmon.h: - changed GPROF4 counter type from unsigned to int. Oops, this should be machine-dependent and/or int32_t. - reorganized overhead counters. Submitted by: Pentium event counter changes mostly by wollman
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edbfedac |
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11-Mar-1996 |
Peter Wemm <peter@FreeBSD.org> |
Import 4.4BSD-Lite2 onto the vendor branch, note that in the kernel, all files are off the vendor branch, so this should not change anything. A "U" marker generally means that the file was not changed in between the 4.4Lite and Lite-2 releases, and does not need a merge. "C" generally means that there was a change. [note new unused (in this form) syscalls.conf, to be 'cvs rm'ed]
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912e6037 |
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29-Dec-1995 |
Bruce Evans <bde@FreeBSD.org> |
Implemented non-statistical kernel profiling. This is based on looking at a high resolution clock for each of the following events: function call, function return, interrupt entry, interrupt exit, and interesting branches. The differences between the times of these events are added at appropriate places in a ordinary histogram (as if very fast statistical profiling sampled the pc at those places) so that ordinary gprof can be used to analyze the times. gmon.h: Histogram counters need to be 4 bytes for microsecond resolutions. They will need to be larger for the 586 clock. The comments were vax-centric and wrong even on vaxes. Does anyone disagree? gprof4.c: The standard gprof should support counters of all integral sizes and the size of the counter should be in the gmon header. This hack will do until then. (Use gprof4 -u to examine the results of non-statistical profiling.) config/*: Non-statistical profiling is configured with `config -pp'. `config -p' still gives ordinary profiling. kgmon/*: Non-statistical profiling is enabled with `kgmon -B'. `kgmon -b' still enables ordinary profiling (and distables non-statistical profiling) if non-statistical profiling is configured.
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037d027c |
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25-Dec-1995 |
Bruce Evans <bde@FreeBSD.org> |
Unstaticized addupc_task(). It is supposed to be called from trap(). See the comments for addupc_intr() and the NetBSD implementation. We use dummy versions of fuswintr() and susiwintr(), so addupc_intr() always pushes the work to trap() (this is inefficient), and trap() calls the special i386 function addupc() instead of addupc_task(). addupc() is more efficient than addupc_intr(), so some of the lost efficiency is recovered. However, addupc() may be broken on plain i386's since it doesn't check for write permission like copyout().
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87b6de2b |
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14-Dec-1995 |
Poul-Henning Kamp <phk@FreeBSD.org> |
A Major staticize sweep. Generates a couple of warnings that I'll deal with later. A number of unused vars removed. A number of unused procs removed or #ifdefed.
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2baeef32 |
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06-Dec-1995 |
Bruce Evans <bde@FreeBSD.org> |
Removed unnecessary #includes of vm stuff. Most of them were once prerequisites for <sys/sysctl.h>. subr_prof.c: Also replaced #include of <sys/user.h> by #include of <sys/resourcevar.h>.
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d841aaa7 |
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02-Dec-1995 |
Bruce Evans <bde@FreeBSD.org> |
Finished (?) cleaning up sysinit stuff.
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4b2af45f |
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19-Nov-1995 |
Poul-Henning Kamp <phk@FreeBSD.org> |
Mega commit for sysctl. Convert the remaining sysctl stuff to the new way of doing things. the devconf stuff is the reason for the large number of files. Cleaned up some compiler warnings while I were there.
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d2d3e875 |
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11-Nov-1995 |
Bruce Evans <bde@FreeBSD.org> |
Included <sys/sysproto.h> to get central declarations for syscall args structs and prototypes for syscalls. Ifdefed duplicated decentralized declarations of args structs. It's convenient to have this visible but they are hard to maintain. Some are already different from the central declarations. 4.4lite2 puts them in comments in the function headers but I wanted to avoid the large changes for that.
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4590fd3a |
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09-Sep-1995 |
David Greenman <dg@FreeBSD.org> |
Fixed init functions argument type - caddr_t -> void *. Fixed a couple of compiler warnings.
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5c7761b2 |
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28-Aug-1995 |
Bruce Evans <bde@FreeBSD.org> |
kmstartup had the wrong type and unnecessarily external linkage for a sysinit function. subr_prof.c: Remove useless comment.
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2b14f991 |
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28-Aug-1995 |
Julian Elischer <julian@FreeBSD.org> |
Reviewed by: julian with quick glances by bruce and others Submitted by: terry (terry lambert) This is a composite of 3 patch sets submitted by terry. they are: New low-level init code that supports loadbal modules better some cleanups in the namei code to help terry in 16-bit character support some changes to the mount-root code to make it a little more modular.. NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able to test those cases.. certainly mounting root of disk still works just fine.. mfs should work but is untested. (tomorrows task) The low level init stuff includes a total rewrite of init_main.c to make it possible for new modules to have an init phase by simply adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can be added to the kernel without editing any other files other than the 'files' file.
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b5e8ce9f |
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16-Mar-1995 |
Bruce Evans <bde@FreeBSD.org> |
Add and move declarations to fix all of the warnings from `gcc -Wimplicit' (except in netccitt, netiso and netns) and most of the warnings from `gcc -Wnested-externs'. Fix all the bugs found. There were no serious ones.
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e45d35c3 |
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28-Jan-1995 |
Bruce Evans <bde@FreeBSD.org> |
Don't waste 1264K for each MB of unused text. Remove misplaced comment.
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ccadde21 |
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21-Sep-1994 |
Bruce Evans <bde@FreeBSD.org> |
Fix compiler warnings.
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3c4dd356 |
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02-Aug-1994 |
David Greenman <dg@FreeBSD.org> |
Added $Id$
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26f9a767 |
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25-May-1994 |
Rodney W. Grimes <rgrimes@FreeBSD.org> |
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
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df8bae1d |
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24-May-1994 |
Rodney W. Grimes <rgrimes@FreeBSD.org> |
BSD 4.4 Lite Kernel Sources
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