Date: Thu, 29 Apr 2021 13:39:17 GMT From: Mitchell Horne <mhorne@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: e0ae2b39aa3e - stable/13 - pmc_allocate(3): document the count argument Message-ID: <202104291339.13TDdHIb070776@gitrepo.freebsd.org>
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The branch stable/13 has been updated by mhorne: URL: https://cgit.FreeBSD.org/src/commit/?id=e0ae2b39aa3e51b0e3f7b9661192cba8f06e7b10 commit e0ae2b39aa3e51b0e3f7b9661192cba8f06e7b10 Author: Mitchell Horne <mhorne@FreeBSD.org> AuthorDate: 2021-04-21 20:27:49 +0000 Commit: Mitchell Horne <mhorne@FreeBSD.org> CommitDate: 2021-04-29 13:13:57 +0000 pmc_allocate(3): document the count argument This was added in b2ca2e50b9aa, and serves to provide an initial value to the PMC, eliminating the need for a second syscall via pmc_set(3). Reviewed by: gnn, 0mp (manpages) MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D29885 (cherry picked from commit 50f6c139970084adeefec98c658645c34b72209e) --- lib/libpmc/pmc_allocate.3 | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/lib/libpmc/pmc_allocate.3 b/lib/libpmc/pmc_allocate.3 index 291ca8ac0113..515b427cf7bc 100644 --- a/lib/libpmc/pmc_allocate.3 +++ b/lib/libpmc/pmc_allocate.3 @@ -23,7 +23,7 @@ .\" .\" $FreeBSD$ .\" -.Dd September 22, 2008 +.Dd April 21, 2021 .Dt PMC_ALLOCATE 3 .Os .Sh NAME @@ -41,6 +41,7 @@ .Fa "uint32_t flags" .Fa "int cpu" .Fa "pmc_id_t *pmcid" +.Fa "uint64_t count" .Fc .Ft int .Fn pmc_release "pmc_id_t pmc" @@ -111,6 +112,20 @@ Process scope PMC allocations should specify the constant .Dv PMC_CPU_ANY for this argument. .Pp +The +.Fa count +argument behaves identically to the +.Xr pmc_set 3 +function's +.Fa value +argument. +For counting PMCs, +.Fa count +specifies the initial value of the allocated PMC. +For sampling PMCs, +.Fa count +specifies the reload count. +.Pp Function .Fn pmc_release releases the PMC denoted by argument
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