From ab012bda4a0bdfb720fdf4debbf401f6923f401f Mon Sep 17 00:00:00 2001 From: nari Date: Wed, 5 Dec 2012 14:53:16 +0000 Subject: [PATCH] * gc.c (getrusage_time): uses clock_gettime() with CLOCK_PROCESS_CPUTIME_ID when available, which provides a 1ns precision on linux. [ruby-core:50495] [Bug #7500] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38214 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- ChangeLog | 6 ++++++ gc.c | 9 ++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/ChangeLog b/ChangeLog index f0c11cdcd7..b54cc20668 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +Wed Dec 5 23:50:23 2012 Narihiro Nakamura + + * gc.c (getrusage_time): uses clock_gettime() with + CLOCK_PROCESS_CPUTIME_ID when available, which provides a 1ns + precision on linux. [ruby-core:50495] [Bug #7500] + Wed Dec 5 22:46:02 2012 Nobuyoshi Nakada * vm.c (rb_vm_make_proc): save the proc made from the given block so diff --git a/gc.c b/gc.c index dfbc82b7b9..beaadddb54 100644 --- a/gc.c +++ b/gc.c @@ -3853,7 +3853,14 @@ static inline void gc_prof_set_heap_info(rb_objspace_t *, gc_profile_record *); static double getrusage_time(void) { -#ifdef RUSAGE_SELF +#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_PROCESS_CPUTIME_ID) + struct timespec ts; + + if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts) == 0) { + return ts.tv_sec + ts.tv_nsec * 1e-9; + } + return 0.0; +#elif defined RUSAGE_SELF struct rusage usage; struct timeval time; getrusage(RUSAGE_SELF, &usage);