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lib/drmtest: extract helpers for signal interruptions

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Also add some hackish stat to check it works.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-01-11 15:33:00 +01:00
parent 36d25cc744
commit cbaa8a389e
3 changed files with 48 additions and 30 deletions
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43
lib/drmtest.c
View File

@ -31,6 +31,8 @@
#include <sys/ioctl.h>
#include <string.h>
#include <sys/mman.h>
#include <signal.h>
#include "drmtest.h"
#include "i915_drm.h"
#include "intel_chipset.h"
@ -219,3 +221,44 @@ void *gem_mmap(int fd, uint32_t handle, int size, int prot)
return ptr;
}
static pid_t signal_helper = -1;
long long int sig_stat;
static void signal_helper_process(pid_t pid)
{
/* Interrupt the parent process at 500Hz, just to be annoying */
while (1) {
usleep(1000 * 1000 / 500);
if (kill(pid, SIGUSR1)) /* Parent has died, so must we. */
exit(0);
}
}
static void sig_handler(int i)
{
sig_stat++;
}
void drmtest_fork_signal_helper(void)
{
pid_t pid;
signal(SIGUSR1, sig_handler);
pid = fork();
if (pid == 0) {
signal_helper_process(getppid());
return;
}
signal_helper = pid;
}
void drmtest_stop_signal_helper(void)
{
if (signal_helper != -1)
kill(signal_helper, SIGQUIT);
if (sig_stat)
fprintf(stderr, "signal handler called %llu times\n", sig_stat);
signal_helper = -1;
}

3
lib/drmtest.h
View File

@ -46,3 +46,6 @@ void gem_set_domain(int fd, uint32_t handle,
void gem_sync(int fd, uint32_t handle);
uint32_t gem_create(int fd, int size);
void *gem_mmap(int fd, uint32_t handle, int size, int prot);
void drmtest_fork_signal_helper(void);
void drmtest_stop_signal_helper(void);

32
tests/gem_stress.c
View File

@ -51,8 +51,6 @@
#include "gem_stress.h"
#include <signal.h>
#define CMD_POLY_STIPPLE_OFFSET 0x7906
/** TODO:
@ -102,29 +100,6 @@ struct {
unsigned max_failed_reads;
} stats;
static void signal_helper_process(pid_t pid)
{
/* Interrupt the parent process at 500Hz, just to be annoying */
while (1) {
usleep(1000 * 1000 / 500);
if (kill(pid, SIGUSR1)) /* Parent has died, so must we. */
exit(0);
}
}
static pid_t fork_signal_helper(void)
{
pid_t pid;
pid = fork();
if (pid == 0) {
signal_helper_process(getppid());
return -1;
}
return pid;
}
static void tile2xy(struct scratch_buf *buf, unsigned tile, unsigned *x, unsigned *y)
{
assert(tile < buf->num_tiles);
@ -883,7 +858,6 @@ int main(int argc, char **argv)
{
int i, j;
unsigned *current_permutation, *tmp_permutation;
pid_t signal_helper = -1;
drm_fd = drm_open_any();
devid = intel_get_drm_devid(drm_fd);
@ -891,9 +865,8 @@ int main(int argc, char **argv)
parse_options(argc, argv);
/* start our little helper early before too may allocations occur */
signal(SIGUSR1, SIG_IGN);
if (options.use_signal_helper)
signal_helper = fork_signal_helper();
drmtest_fork_signal_helper();
init();
@ -943,8 +916,7 @@ int main(int argc, char **argv)
close(drm_fd);
if (signal_helper != -1)
kill(signal_helper, SIGQUIT);
drmtest_stop_signal_helper();
return 0;
}