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tests/gem_reloc_vs_gpu: add thrashing tests

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Using the i915_gem_drop_caches debugfs interface to thrash without
really thrashing.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2013-09-03 17:49:02 +02:00
parent 2c7166eb7a
commit 7db283f930
1 changed files with 40 additions and 4 deletions
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44
tests/gem_reloc_vs_gpu.c
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@ -25,6 +25,7 @@
*
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
@ -33,6 +34,8 @@
#include <errno.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <signal.h>
#include <sys/wait.h>
#include "drm.h"
#include "i915_drm.h"
#include "drmtest.h"
@ -273,13 +276,35 @@ static void do_test(int fd, bool faulting_reloc)
#define INTERRUPT (1 << 0)
#define FAULTING (1 << 1)
#define THRASH (1 << 2)
#define ALL_FLAGS (INTERRUPT | FAULTING | THRASH)
#define THRASH_INACTIVE (1 << 3)
#define ALL_FLAGS (INTERRUPT | FAULTING | THRASH | THRASH_INACTIVE)
static void do_forked_test(int fd, unsigned flags)
{
int num_threads = sysconf(_SC_NPROCESSORS_ONLN);
pid_t pid = -1;
if (flags & THRASH) {
if (flags & (THRASH | THRASH_INACTIVE)) {
sighandler_t oldsig;
char fname[FILENAME_MAX];
int drop_caches_fd;
const char *data = THRASH_INACTIVE ? "0xf" : "0x7";
snprintf(fname, FILENAME_MAX, "%s/%i/%s",
"/sys/kernel/debug/dri", drm_get_card(),
"i915_gem_drop_caches");
drop_caches_fd = open(fname, O_WRONLY);
igt_require(drop_caches_fd >= 0);
oldsig = signal(SIGQUIT, SIG_DFL);
pid = fork();
signal(SIGQUIT, oldsig);
if (pid == 0) {
while (1) {
usleep(1000);
igt_assert(write(drop_caches_fd, data, strlen(data) + 1) == strlen(data) + 1);
}
}
}
igt_fork(i, num_threads * 4) {
@ -297,6 +322,13 @@ static void do_forked_test(int fd, unsigned flags)
}
igt_waitchildren();
if (pid != -1) {
int exitcode;
kill(pid, SIGQUIT);
wait(&exitcode);
}
}
int fd;
@ -334,10 +366,14 @@ int main(int argc, char **argv)
igt_stop_signal_helper();
for (unsigned flags = 0; flags <= ALL_FLAGS; flags++) {
igt_subtest_f("forked%s%s%s",
if ((flags & THRASH) && (flags & THRASH_INACTIVE))
continue;
igt_subtest_f("forked%s%s%s%s",
flags & INTERRUPT ? "-interruptible" : "",
flags & FAULTING ? "-faulting-reloc" : "",
flags & THRASH ? "-thrashing" : "")
flags & THRASH ? "-thrashing" : "",
flags & THRASH ? "-thrash-inactive" : "")
do_forked_test(fd, flags);
}