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igt/gem_shrink: Fix leak in userptr, add another

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Hitting oom from userptr because we had N threads all consuming all of
memory, wasn't the intention but the bugs it found were useful!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-04-04 15:03:10 +01:00
parent 1a50172302
commit 7a977554cb
1 changed files with 38 additions and 2 deletions
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40
tests/gem_shrink.c
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@ -33,6 +33,10 @@
#define igt_timeout(T) \
for (struct timespec t__={}; igt_seconds_elapsed(&t__) < (T); )
#ifndef MADV_FREE
#define MADV_FREE 8
#endif
static void get_pages(int fd, uint64_t alloc)
{
uint32_t handle = gem_create(fd, alloc);
@ -168,6 +172,8 @@ static void userptr(int fd, uint64_t alloc)
do_ioctl(fd, LOCAL_IOCTL_I915_GEM_USERPTR, &userptr);
gem_set_domain(fd, userptr.handle, I915_GEM_DOMAIN_GTT, 0);
madvise(ptr, alloc, MADV_FREE);
}
static bool has_userptr(void)
@ -189,12 +195,30 @@ static bool has_userptr(void)
return err == EFAULT;
}
static void leak(int fd, uint64_t alloc)
{
char *ptr;
ptr = mmap(NULL, alloc, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_PRIVATE | MAP_POPULATE,
-1, 0);
igt_assert(ptr != (char *)-1);
while (alloc) {
alloc -= 4096;
ptr[alloc] = 0;
}
}
#define SOLO 1
#define USERPTR 2
#define OOM 4
static void run_test(int nchildren, uint64_t alloc,
void (*func)(int, uint64_t), unsigned flags)
{
const int timeout = flags & SOLO ? 1 : 20;
/* Each pass consumes alloc bytes and doesn't drop
* its reference to object (i.e. calls
* gem_madvise(DONTNEED) instead of gem_close()).
@ -207,10 +231,21 @@ static void run_test(int nchildren, uint64_t alloc,
nchildren = 1;
/* Background load */
if (flags & OOM) {
igt_fork(child, nchildren) {
igt_timeout(timeout) {
int fd = drm_open_driver(DRIVER_INTEL);
for (int pass = 0; pass < nchildren; pass++)
leak(fd, alloc);
close(fd);
}
}
}
if (flags & USERPTR) {
igt_require(has_userptr());
igt_fork(child, (nchildren + 1)/2) {
igt_timeout(flags & SOLO ? 1 : 20) {
igt_timeout(timeout) {
int fd = drm_open_driver(DRIVER_INTEL);
for (int pass = 0; pass < nchildren; pass++)
userptr(fd, alloc);
@ -222,7 +257,7 @@ static void run_test(int nchildren, uint64_t alloc,
/* Exercise major ioctls */
igt_fork(child, nchildren) {
igt_timeout(flags & SOLO ? 1 : 20) {
igt_timeout(timeout) {
int fd = drm_open_driver(DRIVER_INTEL);
for (int pass = 0; pass < nchildren; pass++)
func(fd, alloc);
@ -255,6 +290,7 @@ igt_main
{ "-sanitycheck", SOLO },
{ "", 0 },
{ "-userptr", USERPTR },
{ "-oom", USERPTR | OOM },
{ NULL },
};
uint64_t alloc_size = 0;