src/contrib/llvm-project/llvm/lib/Support/Unix/Threading.inc, branch main FreeBSD source tree Merge llvm-project main llvmorg-19-init-18630-gf2ccf80136a0 2024-10-23T18:26:01+00:00 Dimitry Andric dim@FreeBSD.org 2024-07-27T23:34:35+00:00 0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583 This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp to llvm-project main llvmorg-19-init-18630-gf2ccf80136a0, the last commit before the upstream release/19.x branch was created. PR: 280562 MFC after: 1 month 
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-19-init-18630-gf2ccf80136a0, the
last commit before the upstream release/19.x branch was created.

PR:		280562
MFC after:	1 month
Merge llvm-project main llvmorg-18-init-15088-gd14ee76181fb 2024-04-06T20:11:55+00:00 Dimitry Andric dim@FreeBSD.org 2023-12-18T20:30:12+00:00 5f757f3ff9144b609b3c433dfd370cc6bdc191ad This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp to llvm-project main llvmorg-18-init-15088-gd14ee76181fb. PR: 276104 MFC after: 1 month 
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-15088-gd14ee76181fb.

PR:		276104
MFC after:	1 month
Merge llvm-project main llvmorg-16-init-18548-gb0daacf58f41 2023-06-22T18:20:56+00:00 Dimitry Andric dim@FreeBSD.org 2023-04-14T21:41:27+00:00 bdd1243df58e60e85101c09001d9812a789b6bc4 This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp to llvmorg-16-init-18548-gb0daacf58f41. PR: 271047 MFC after: 1 month 
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-16-init-18548-gb0daacf58f41.

PR:		271047
MFC after:	1 month
Merge llvm-project main llvmorg-15-init-15358-g53dc0f10787 2023-02-08T19:02:26+00:00 Dimitry Andric dim@FreeBSD.org 2022-07-04T19:20:19+00:00 81ad626541db97eb356e2c1d4a20eb2a26a766ab This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp to llvmorg-15-init-15358-g53dc0f10787. PR: 265425 MFC after: 2 weeks 
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-15-init-15358-g53dc0f10787.

PR:		265425
MFC after:	2 weeks
Merge llvm-project main llvmorg-13-init-16847-g88e66fa60ae5 2021-11-13T20:39:49+00:00 Dimitry Andric dim@FreeBSD.org 2021-08-22T19:00:43+00:00 fe6060f10f634930ff71b7c50291ddc610da2475 This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp to llvmorg-13-init-16847-g88e66fa60ae5, the last commit before the upstream release/13.x branch was created. PR: 258209 MFC after: 2 weeks 
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-13-init-16847-g88e66fa60ae5, the last commit before
the upstream release/13.x branch was created.

PR:		258209
MFC after:	2 weeks
Merge commit d989ffd10 from llvm git (by Dimitry Andric): 2020-12-03T19:29:18+00:00 Dimitry Andric dim@FreeBSD.org 2020-12-03T19:29:18+00:00 c3f7be36e8ad24c31a3c56851681803704a4b0b2 Implement computeHostNumHardwareThreads() for FreeBSD This retrieves CPU affinity via FreeBSD's cpuset(2) API, and makes LLVM respect affinity settings configured by the user via the cpuset(1) command. In particular, this allows to reduce the number of threads used on machines with high core counts, which can interact badly with parallelized build systems. This is particularly noticable with lld, which spawns lots of threads even for linking e.g. hello_world! This fix is related to PR48193, but does not adress the more fundamental problem, which is that LLVM by default grabs as many CPUs and/or threads as possible. Reviewed By: MaskRay Differential Revision: https://reviews.llvm.org/D92271 Originally by: mjg MFC after: 1 week 
  Implement computeHostNumHardwareThreads() for FreeBSD

  This retrieves CPU affinity via FreeBSD's cpuset(2) API, and makes
  LLVM respect affinity settings configured by the user via the
  cpuset(1) command.

  In particular, this allows to reduce the number of threads used on
  machines with high core counts, which can interact badly with
  parallelized build systems. This is particularly noticable with lld,
  which spawns lots of threads even for linking e.g. hello_world!

  This fix is related to PR48193, but does not adress the more
  fundamental problem, which is that LLVM by default grabs as many CPUs
  and/or threads as possible.

  Reviewed By: MaskRay

  Differential Revision: https://reviews.llvm.org/D92271

Originally by:	mjg
MFC after:	1 week
Revert r367815, so we can apply the slightly different version that 2020-12-03T19:26:21+00:00 Dimitry Andric dim@FreeBSD.org 2020-12-03T19:26:21+00:00 5cc6cb2645b79b6108922957984dd86077cd7f06 landed upstream: For llvm's internal function which retrieves the number of available "hardware threads", use cpuset_getaffinity(2) on FreeBSD, so it will honor processor sets configured by the cpuset(1) command. This should make it possible to avoid e.g. lld creating a huge number of threads on a machine with many cores, even for linking simple programs. This will also be submitted upstream. Submitted by: mjg 
landed upstream:

For llvm's internal function which retrieves the number of available
"hardware threads", use cpuset_getaffinity(2) on FreeBSD, so it will
honor processor sets configured by the cpuset(1) command.

This should make it possible to avoid e.g. lld creating a huge number of
threads on a machine with many cores, even for linking simple programs.

This will also be submitted upstream.

Submitted by:	mjg
For llvm's internal function which retrieves the number of available 2020-11-18T19:55:24+00:00 Dimitry Andric dim@FreeBSD.org 2020-11-18T19:55:24+00:00 991f6e7534a9b1a99b7da711676e6714e2cf6680 "hardware threads", use cpuset_getaffinity(2) on FreeBSD, so it will honor processor sets configured by the cpuset(1) command. This should make it possible to avoid e.g. lld creating a huge number of threads on a machine with many cores, even for linking simple programs. This will also be submitted upstream. Submitted by: mjg MFC after: 1 week 
"hardware threads", use cpuset_getaffinity(2) on FreeBSD, so it will
honor processor sets configured by the cpuset(1) command.

This should make it possible to avoid e.g. lld creating a huge number of
threads on a machine with many cores, even for linking simple programs.

This will also be submitted upstream.

Submitted by:	mjg
MFC after:	1 week
Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp 2020-07-31T21:22:58+00:00 Dimitry Andric dim@FreeBSD.org 2020-07-31T21:22:58+00:00 5ffd83dbcc34f10e07f6d3e968ae6365869615f4 master 2e10b7a39b9, the last commit before the llvmorg-12-init tag, from which release/11.x was branched. Note that for now, I rolled back all our local changes to make merging easier, and I will reapply the still-relevant ones after updating to 11.0.0-rc1. 
master 2e10b7a39b9, the last commit before the llvmorg-12-init tag, from
which release/11.x was branched.

Note that for now, I rolled back all our local changes to make merging
easier, and I will reapply the still-relevant ones after updating to
11.0.0-rc1.
Merge ^/vendor/lvm-project/master up to its last change (upstream commit 2020-01-24T22:00:03+00:00 Dimitry Andric dim@FreeBSD.org 2020-01-24T22:00:03+00:00 480093f4440d54b30b3025afeac24b48f2ba7a2e e26a78e70), and resolve conflicts. 
e26a78e70), and resolve conflicts.