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Ported to NetBSD (1/2): Replaced Linux-specific timer call

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CLOCK_THREAD_CPUTIME_ID is a linux-specific timer. On NetBSD, the best
way to get timer information appears to be getrusage, which happens to
be fairly cross-platform.
This commit is contained in:
TQ Hirsch 2014-03-13 17:48:39 +00:00
parent 5270484839
commit 426a3f8468
1 changed files with 18 additions and 0 deletions
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18
src/benchmark.c
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@ -10,7 +10,13 @@
#include <mach/mach.h> #include <mach/mach.h>
#endif #endif
#ifdef __NetBSD__
#include <sys/resource.h>
#endif
void h_benchmark_clock_gettime(struct timespec *ts) { void h_benchmark_clock_gettime(struct timespec *ts) {
if (ts == NULL)
return;
#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time #ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
/* /*
* This returns real time, not CPU time. See http://stackoverflow.com/a/6725161 * This returns real time, not CPU time. See http://stackoverflow.com/a/6725161
@ -23,6 +29,18 @@ void h_benchmark_clock_gettime(struct timespec *ts) {
mach_port_deallocate(mach_task_self(), cclock); mach_port_deallocate(mach_task_self(), cclock);
ts->tv_sec = mts.tv_sec; ts->tv_sec = mts.tv_sec;
ts->tv_nsec = mts.tv_nsec; ts->tv_nsec = mts.tv_nsec;
#elif defined(__NetBSD__)
// NetBSD doesn't have CLOCK_THREAD_CPUTIME_ID. We'll use getrusage instead
struct rusage rusage;
getrusage(RUSAGE_SELF, &rusage);
ts->tv_nsec = (rusage.ru_utime.tv_usec + rusage.ru_stime.tv_usec) * 1000;
// not going to overflow; can be at most 2e9-2
ts->tv_sec = rusage.ru_utime.tv_sec + rusage.ru_utime.tv_sec;
if (ts->tv_nsec >= 1000000000) {
ts->tv_nsec -= 1000000000; // subtract a second
ts->tv_sec += 1; // add it back.
}
assert (ts->tv_nsec <= 1000000000);
#else #else
clock_gettime(CLOCK_THREAD_CPUTIME_ID, ts); clock_gettime(CLOCK_THREAD_CPUTIME_ID, ts);
#endif #endif