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igt/gem_ctx_create: Exercise a trivial allocation failure

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Trying to allocate and use lots of contexts with execlists and !llc end
ups in faliure very quickly.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-03-01 21:18:51 +00:00
parent 1112abe5ec
commit fbe92a222e
1 changed files with 65 additions and 18 deletions
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83
tests/gem_ctx_create.c
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@ -29,42 +29,89 @@
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <time.h>
static int __gem_context_create(int fd, struct drm_i915_gem_context_create *arg)
{
int ret = 0;
if (drmIoctl(fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, arg))
ret = -errno;
return ret;
}
int ret, fd;
struct drm_i915_gem_context_create create;
static double elapsed(const struct timespec *start,
const struct timespec *end)
{
return (end->tv_sec - start->tv_sec) + 1e-9*(end->tv_nsec - start->tv_nsec);
}
static void active(int fd, int timeout)
{
const uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 obj;
struct timespec start, end;
unsigned count = 0;
memset(&obj, 0, sizeof(obj));
obj.handle = gem_create(fd, 4096);
gem_write(fd, obj.handle, 0, &bbe, sizeof(bbe));
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)&obj;
execbuf.buffer_count = 1;
clock_gettime(CLOCK_MONOTONIC, &start);
do {
do {
execbuf.rsvd1 = gem_context_create(fd);
gem_execbuf(fd, &execbuf);
gem_context_destroy(fd, execbuf.rsvd1);
} while (++count & 1023);
clock_gettime(CLOCK_MONOTONIC, &end);
} while (elapsed(&start, &end) < timeout);
gem_sync(fd, obj.handle);
clock_gettime(CLOCK_MONOTONIC, &end);
igt_info("Context creation + execution: %.3f us\n",
elapsed(&start, &end) / count *1e6);
gem_close(fd, obj.handle);
}
igt_main
{
igt_fixture
struct drm_i915_gem_context_create create;
int fd;
igt_fixture {
fd = drm_open_driver_render(DRIVER_INTEL);
memset(&create, 0, sizeof(create));
igt_require(__gem_context_create(fd, &create) == 0);
gem_context_destroy(fd, create.ctx_id);
}
igt_subtest("basic") {
memset(&create, 0, sizeof(create));
create.ctx_id = rand();
create.pad = 0;
ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
igt_skip_on(ret != 0 && (errno == ENODEV || errno == EINVAL));
igt_assert(ret == 0);
igt_assert_eq(__gem_context_create(fd, &create), 0);
igt_assert(create.ctx_id != 0);
gem_context_destroy(fd, create.ctx_id);
}
igt_subtest("invalid-pad") {
memset(&create, 0, sizeof(create));
create.ctx_id = rand();
create.pad = 0;
ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
igt_skip_on(ret != 0 && (errno == ENODEV || errno == EINVAL));
igt_assert(ret == 0);
igt_assert(create.ctx_id != 0);
create.pad = 1;
igt_assert(drmIoctl(fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create) < 0 &&
errno == EINVAL);
igt_assert_eq(__gem_context_create(fd, &create), -EINVAL);
}
igt_subtest("active")
active(fd, 20);
igt_fixture
close(fd);
}