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[perf] Enable traces to be interrupted

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Waiting for a long running benchmark can be very annoying, especially if
you just want a rough-and-ready result. So hook into SIGINT and stop the
current benchmark (after the end of the iteration) on the first ^C. A
second ^C within the same iteration will kill the program as before.
This commit is contained in:
Chris Wilson 2009-06-04 10:03:45 +01:00
parent 2eaced2447
commit 5c2e73e74c
1 changed files with 19 additions and 1 deletions
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20
perf/cairo-perf-trace.c
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@ -44,6 +44,8 @@
#include <sys/types.h>
#include <dirent.h>
#include <signal.h>
#if HAVE_FCFINI
#include <fontconfig/fontconfig.h>
#endif
@ -147,6 +149,19 @@ _similar_surface_create (void *closure,
return cairo_surface_create_similar (closure, content, width, height);
}
static int user_interrupt;
static void
interrupt (int sig)
{
if (user_interrupt) {
signal (sig, SIG_DFL);
raise (sig);
}
user_interrupt = 1;
}
static void
execute (cairo_perf_t *perf,
cairo_surface_t *target,
@ -202,7 +217,7 @@ execute (cairo_perf_t *perf,
}
low_std_dev_count = 0;
for (i = 0; i < perf->iterations; i++) {
for (i = 0; i < perf->iterations && ! user_interrupt; i++) {
cairo_script_interpreter_t *csi;
csi = cairo_script_interpreter_create ();
@ -242,6 +257,7 @@ execute (cairo_perf_t *perf,
}
}
}
user_interrupt = 0;
if (perf->summary) {
_cairo_stats_compute (&stats, times, i);
@ -473,6 +489,8 @@ main (int argc, char *argv[])
stderr);
}
signal (SIGINT, interrupt);
if (getenv ("CAIRO_TRACE_DIR") != NULL)
trace_dir = getenv ("CAIRO_TRACE_DIR");