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authorChris Wilson <chris@chris-wilson.co.uk>2016-10-30 08:33:06 +0000
committerChris Wilson <chris@chris-wilson.co.uk>2016-11-02 16:59:59 +0000
commit94c6cbdf3793e555777c35574cec404ce7b8d81c (patch)
tree399b10bb429af6ba2a348d0c39329bf7824b607b /tests/gem_ctx_create.c
parentbd429cdc082748f1284ad987a867b502e5c8009f (diff)
igt/gem_ctx_create: Exercise allocating as many contexts as we can
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'tests/gem_ctx_create.c')
-rw-r--r--tests/gem_ctx_create.c156
1 files changed, 149 insertions, 7 deletions
diff --git a/tests/gem_ctx_create.c b/tests/gem_ctx_create.c
index cd2db347..886a5bb8 100644
--- a/tests/gem_ctx_create.c
+++ b/tests/gem_ctx_create.c
@@ -26,16 +26,22 @@
*/
#include "igt.h"
+
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <time.h>
+#include "igt_rand.h"
+
#define LOCAL_I915_EXEC_BSD_SHIFT (13)
#define LOCAL_I915_EXEC_BSD_MASK (3 << LOCAL_I915_EXEC_BSD_SHIFT)
#define ENGINE_FLAGS (I915_EXEC_RING_MASK | LOCAL_I915_EXEC_BSD_MASK)
+static unsigned all_engines[16];
+static unsigned all_nengine;
+
static unsigned ppgtt_engines[16];
static unsigned ppgtt_nengine;
@@ -167,6 +173,131 @@ static void active(int fd, unsigned engine, int timeout, int ncpus)
munmap(shared, 4096);
}
+static void xchg_u32(void *array, unsigned i, unsigned j)
+{
+ uint32_t *a = array, tmp;
+
+ tmp = a[i];
+ a[i] = a[j];
+ a[j] = tmp;
+}
+
+static unsigned __context_size(int fd)
+{
+ switch (intel_gen(intel_get_drm_devid(fd))) {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7: return 17 << 12;
+ case 8: return 20 << 12;
+ case 9: return 22 << 12;
+ default: return 32 << 12;
+ }
+}
+
+static unsigned context_size(int fd)
+{
+ uint64_t size;
+
+ size = __context_size(fd);
+ if (ppgtt_nengine > 1) {
+ size += 4 << 12; /* ringbuffer as well */
+ size *= ppgtt_nengine;
+ }
+
+ return size;
+}
+
+static uint64_t total_avail_mem(unsigned mode)
+{
+ uint64_t total = intel_get_avail_ram_mb();
+ if (mode & CHECK_SWAP)
+ total += intel_get_total_swap_mb();
+ return total << 20;
+}
+
+static void maximum(int fd, int ncpus, unsigned mode)
+{
+ struct drm_i915_gem_context_create create;
+ const uint32_t bbe = MI_BATCH_BUFFER_END;
+ struct drm_i915_gem_execbuffer2 execbuf;
+ struct drm_i915_gem_exec_object2 obj[2];
+ uint64_t avail_mem = total_avail_mem(mode);
+ unsigned ctx_size = context_size(fd);
+ uint32_t *contexts = NULL;
+ unsigned long count = 0;
+
+ memset(&create, 0, sizeof(create));
+ do {
+ int err;
+
+ if ((count & -count) == count) {
+ int sz = count ? 2*count : 1;
+ contexts = realloc(contexts,
+ sz*sizeof(*contexts));
+ igt_assert(contexts);
+ }
+
+ err = -ENOMEM;
+ if (avail_mem > (count + 1) * ctx_size)
+ err = __gem_context_create(fd, &create);
+ if (err) {
+ igt_info("Created %lu contexts, before failing with '%s' [%d]\n",
+ count, strerror(-err), -err);
+ break;
+ }
+
+ contexts[count++] = create.ctx_id;
+ } while (1);
+ igt_require(count);
+
+ memset(obj, 0, sizeof(obj));
+ obj[1].handle = gem_create(fd, 4096);
+ gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe));
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)obj;
+ execbuf.buffer_count = 2;
+
+ igt_fork(child, ncpus) {
+ struct timespec start, end;
+
+ hars_petruska_f54_1_random_perturb(child);
+ obj[0].handle = gem_create(fd, 4096);
+
+ clock_gettime(CLOCK_MONOTONIC, &start);
+ for (int repeat = 0; repeat < 3; repeat++) {
+ igt_permute_array(contexts, count, xchg_u32);
+ igt_permute_array(all_engines, all_nengine, xchg_u32);
+
+ for (unsigned long i = 0; i < count; i++) {
+ execbuf.rsvd1 = contexts[i];
+ for (unsigned long j = 0; j < all_nengine; j++) {
+ execbuf.flags = all_engines[j];
+ gem_execbuf(fd, &execbuf);
+ }
+ }
+ }
+ gem_sync(fd, obj[0].handle);
+ clock_gettime(CLOCK_MONOTONIC, &end);
+ gem_close(fd, obj[0].handle);
+
+ igt_info("[%d] Context execution: %.3f us\n", child,
+ elapsed(&start, &end) / (3 * count * all_nengine) * 1e6);
+ }
+ igt_waitchildren();
+
+ gem_close(fd, obj[1].handle);
+
+ for (unsigned long i = 0; i < count; i++)
+ gem_context_destroy(fd, contexts[i]);
+ free(contexts);
+}
+
igt_main
{
const int ncpus = sysconf(_SC_NPROCESSORS_ONLN);
@@ -174,20 +305,26 @@ igt_main
int fd = -1;
igt_fixture {
+ unsigned engine;
+
fd = drm_open_driver(DRIVER_INTEL);
memset(&create, 0, sizeof(create));
igt_require(__gem_context_create(fd, &create) == 0);
gem_context_destroy(fd, create.ctx_id);
- if (gem_uses_full_ppgtt(fd)) {
- unsigned engine;
+ for_each_engine(fd, engine) {
+ if (engine == 0)
+ continue;
+ all_engines[all_nengine++] = engine;
+ }
+ igt_require(all_nengine);
- for_each_engine(fd, engine) {
- if (engine == 0)
- continue;
- ppgtt_engines[ppgtt_nengine++] = engine;
- }
+ if (gem_uses_full_ppgtt(fd)) {
+ ppgtt_nengine = all_nengine;
+ memcpy(ppgtt_engines,
+ all_engines,
+ all_nengine * sizeof(all_engines[0]));
} else
ppgtt_engines[ppgtt_nengine++] = 0;
@@ -210,6 +347,11 @@ igt_main
igt_assert_eq(__gem_context_create(fd, &create), -EINVAL);
}
+ igt_subtest("maximum-mem")
+ maximum(fd, ncpus, CHECK_RAM);
+ igt_subtest("maximum-swap")
+ maximum(fd, ncpus, CHECK_RAM | CHECK_SWAP);
+
igt_subtest("basic-files")
files(fd, 5, 1);
igt_subtest("files")