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perf: Switch from alarm to setitimer for more fine-grained control of timers

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This commit is contained in:
Carl Worth 2006-08-31 14:08:43 -07:00
parent 2ebb9af434
commit 6ae6d91c0c
5 changed files with 20 additions and 7 deletions
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17
perf/cairo-perf-timer-posix.c
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@ -63,8 +63,21 @@ alarm_handler (int signal) {
} }
void void
set_alarm (int seconds) { set_alarm (double seconds) {
struct itimerval tr;
long sec, usec;
cairo_perf_alarm_expired = 0; cairo_perf_alarm_expired = 0;
signal (SIGALRM, alarm_handler); signal (SIGALRM, alarm_handler);
alarm (seconds);
sec = floor (seconds);
seconds -= sec;
usec = seconds * 1e6;
tr.it_interval.tv_sec = 0;
tr.it_interval.tv_usec = 0;
tr.it_value.tv_sec = sec;
tr.it_value.tv_usec = usec;
setitimer (ITIMER_REAL, &tr, NULL);
} }

2
perf/cairo-perf-timer-win32.c
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@ -64,7 +64,7 @@ alarm_handler (void *closure, DWORD dwTimerLowValue, DWORD dwTimerHighValue) {
HANDLE hTimer = NULL; HANDLE hTimer = NULL;
void void
set_alarm (int seconds) { set_alarm (double seconds) {
if (hTimer == NULL) if (hTimer == NULL)
hTimer = CreateWaitableTimer(NULL, TRUE, NULL); hTimer = CreateWaitableTimer(NULL, TRUE, NULL);
cairo_perf_alarm_expired = 0; cairo_perf_alarm_expired = 0;

2
perf/cairo-perf-timer.h
View file

@ -60,6 +60,6 @@ void
alarm_handler (int signal); alarm_handler (int signal);
void void
set_alarm (int seconds); set_alarm (double seconds);
#endif #endif

4
perf/cairo-perf.c
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@ -27,7 +27,7 @@
#include "cairo-perf.h" #include "cairo-perf.h"
int cairo_perf_duration = 1; double cairo_perf_duration = 1;
int cairo_perf_iterations = 10; int cairo_perf_iterations = 10;
@ -134,7 +134,7 @@ main (int argc, char *argv[])
stats_t stats; stats_t stats;
if (getenv("CAIRO_PERF_DURATION")) if (getenv("CAIRO_PERF_DURATION"))
cairo_perf_duration = strtol(getenv("CAIRO_PERF_DURATION"), NULL, 0); cairo_perf_duration = strtod(getenv("CAIRO_PERF_DURATION"), NULL);
if (getenv("CAIRO_PERF_ITERATIONS")) if (getenv("CAIRO_PERF_ITERATIONS"))
cairo_perf_iterations = strtol(getenv("CAIRO_PERF_ITERATIONS"), NULL, 0); cairo_perf_iterations = strtol(getenv("CAIRO_PERF_ITERATIONS"), NULL, 0);

2
perf/cairo-perf.h
View file

@ -32,7 +32,7 @@
#include "cairo-perf-timer.h" #include "cairo-perf-timer.h"
extern int cairo_perf_duration; extern double cairo_perf_duration;
extern int cairo_perf_alarm_expired; extern int cairo_perf_alarm_expired;
#if CAIRO_HAS_WIN32_SURFACE #if CAIRO_HAS_WIN32_SURFACE