[Intel-gfx] [PATCH i-g-t 4/8] tests/i915/gem_exec_capture: Use contexts and engines properly

John.C.Harrison
2021-10-21T23:41:02Z

From: John Harrison <John.C.Harrison@Intel.com>

Some of the capture tests were using explicit contexts, some not. Some
were poking the per engine pre-emption timeout, some not. This would
lead to sporadic failures due to random timeouts, contexts being
banned depending upon how many subtests were run and/or how many
engines a given platform has, and other such failures.

So, update all tests to be conistent.

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
---
tests/i915/gem_exec_capture.c | 80 +++++++++++++++++++++++++----------
1 file changed, 58 insertions(+), 22 deletions(-)

diff --git a/tests/i915/gem_exec_capture.c b/tests/i915/gem_exec_capture.c
index c85c198f7..e373d24ed 100644
--- a/tests/i915/gem_exec_capture.c
+++ b/tests/i915/gem_exec_capture.c
@@ -204,8 +204,19 @@ static int check_error_state(int dir, struct offset *obj_offsets, int obj_count,
return blobs;
}

+static void configure_hangs(int fd, const struct intel_execution_engine2 *e, int ctxt_id)
+{
+ /* Ensure fast hang detection */
+ gem_engine_property_printf(fd, e->name, "preempt_timeout_ms", "%d", 250);
+ gem_engine_property_printf(fd, e->name, "heartbeat_interval_ms", "%d", 500);
+
+ /* Allow engine based resets and disable banning */
+ igt_allow_hang(fd, ctxt_id, HANG_ALLOW_CAPTURE);
+}
+
static void __capture1(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
- unsigned ring, uint32_t target, uint64_t target_size)
+ const struct intel_execution_engine2 *e,
+ uint32_t target, uint64_t target_size)
{
const unsigned int gen = intel_gen(intel_get_drm_devid(fd));
struct drm_i915_gem_exec_object2 obj[4];
@@ -219,6 +230,8 @@ static void __capture1(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
struct offset offset;
int i;

+ configure_hangs(fd, e, ctx->id);
+
memset(obj, 0, sizeof(obj));
obj[SCRATCH].handle = gem_create(fd, 4096);
obj[SCRATCH].flags = EXEC_OBJECT_WRITE;
@@ -297,7 +310,7 @@ static void __capture1(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)obj;
execbuf.buffer_count = ARRAY_SIZE(obj);
- execbuf.flags = ring;
+ execbuf.flags = e->flags;
if (gen > 3 && gen < 6)
execbuf.flags |= I915_EXEC_SECURE;
execbuf.rsvd1 = ctx->id;
@@ -326,7 +339,8 @@ static void __capture1(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
gem_close(fd, obj[SCRATCH].handle);
}

-static void capture(int fd, int dir, const intel_ctx_t *ctx, unsigned ring)
+static void capture(int fd, int dir, const intel_ctx_t *ctx,
+ const struct intel_execution_engine2 *e)
{
uint32_t handle;
uint64_t ahnd;
@@ -335,7 +349,7 @@ static void capture(int fd, int dir, const intel_ctx_t *ctx, unsigned ring)
handle = gem_create(fd, obj_size);
ahnd = get_reloc_ahnd(fd, ctx->id);

- __capture1(fd, dir, ahnd, ctx, ring, handle, obj_size);
+ __capture1(fd, dir, ahnd, ctx, e, handle, obj_size);

gem_close(fd, handle);
put_ahnd(ahnd);
@@ -355,9 +369,9 @@ static int cmp(const void *A, const void *B)
}

static struct offset *
-__captureN(int fd, int dir, uint64_t ahnd, unsigned ring,
- unsigned int size, int count,
- unsigned int flags)
+__captureN(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
+ const struct intel_execution_engine2 *e,
+ unsigned int size, int count, unsigned int flags)
#define INCREMENTAL 0x1
#define ASYNC 0x2
{
@@ -369,6 +383,8 @@ __captureN(int fd, int dir, uint64_t ahnd, unsigned ring,
struct offset *offsets;
int i;

+ configure_hangs(fd, e, ctx->id);
+
offsets = calloc(count, sizeof(*offsets));
igt_assert(offsets);

@@ -470,9 +486,10 @@ __captureN(int fd, int dir, uint64_t ahnd, unsigned ring,
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)obj;
execbuf.buffer_count = count + 2;
- execbuf.flags = ring;
+ execbuf.flags = e->flags;
if (gen > 3 && gen < 6)
execbuf.flags |= I915_EXEC_SECURE;
+ execbuf.rsvd1 = ctx->id;

igt_assert(!READ_ONCE(*seqno));
gem_execbuf(fd, &execbuf);
@@ -505,10 +522,20 @@ __captureN(int fd, int dir, uint64_t ahnd, unsigned ring,

static void many(int fd, int dir, uint64_t size, unsigned int flags)
{
+ const struct intel_execution_engine2 *e;
+ const intel_ctx_t *ctx;
uint64_t ram, gtt, ahnd;
unsigned long count, blobs;
struct offset *offsets;

+ /* Find the first available engine: */
+ ctx = intel_ctx_create_all_physical(fd);
+ igt_assert(ctx);
+ for_each_ctx_engine(fd, ctx, e)
+ for_each_if(gem_class_can_store_dword(fd, e->class))
+ break;
+ igt_assert(e);
+
gtt = gem_aperture_size(fd) / size;
ram = (intel_get_avail_ram_mb() << 20) / size;
igt_debug("Available objects in GTT:%"PRIu64", RAM:%"PRIu64"\n",
@@ -518,9 +545,9 @@ static void many(int fd, int dir, uint64_t size, unsigned int flags)
igt_require(count > 1);

intel_require_memory(count, size, CHECK_RAM);
- ahnd = get_reloc_ahnd(fd, 0);
+ ahnd = get_reloc_ahnd(fd, ctx->id);

- offsets = __captureN(fd, dir, ahnd, 0, size, count, flags);
+ offsets = __captureN(fd, dir, ahnd, ctx, e, size, count, flags);

blobs = check_error_state(dir, offsets, count, size, !!(flags & INCREMENTAL));
igt_info("Captured %lu %"PRId64"-blobs out of a total of %lu\n",
@@ -531,7 +558,7 @@ static void many(int fd, int dir, uint64_t size, unsigned int flags)
}

static void prioinv(int fd, int dir, const intel_ctx_t *ctx,
- unsigned ring, const char *name)
+ const struct intel_execution_engine2 *e)
{
const uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_exec_object2 obj = {
@@ -540,7 +567,7 @@ static void prioinv(int fd, int dir, const intel_ctx_t *ctx,
struct drm_i915_gem_execbuffer2 execbuf = {
.buffers_ptr = to_user_pointer(&obj),
.buffer_count = 1,
- .flags = ring,
+ .flags = e->flags,
.rsvd1 = ctx->id,
};
int64_t timeout = NSEC_PER_SEC; /* 1s, feeling generous, blame debug */
@@ -555,10 +582,6 @@ static void prioinv(int fd, int dir, const intel_ctx_t *ctx,
igt_require(igt_params_set(fd, "reset", "%u", -1)); /* engine resets! */
igt_require(gem_gpu_reset_type(fd) > 1);

- /* Needs to be fast enough for the hangcheck to return within 1s */
- igt_require(gem_engine_property_printf(fd, name, "preempt_timeout_ms", "%d", 0) > 0);
- gem_engine_property_printf(fd, name, "preempt_timeout_ms", "%d", 500);
-
gtt = gem_aperture_size(fd) / size;
ram = (intel_get_avail_ram_mb() << 20) / size;
igt_debug("Available objects in GTT:%"PRIu64", RAM:%"PRIu64"\n",
@@ -576,15 +599,19 @@ static void prioinv(int fd, int dir, const intel_ctx_t *ctx,

igt_assert(pipe(link) == 0);
igt_fork(child, 1) {
+ const intel_ctx_t *ctx2;
fd = gem_reopen_driver(fd);
igt_debug("Submitting large capture [%ld x %dMiB objects]\n",
count, (int)(size >> 20));

+ ctx2 = intel_ctx_create_all_physical(fd);
+ igt_assert(ctx2);
+
intel_allocator_init();
/* Reopen the allocator in the new process. */
- ahnd = get_reloc_ahnd(fd, 0);
+ ahnd = get_reloc_ahnd(fd, ctx2->id);

- free(__captureN(fd, dir, ahnd, ring, size, count, ASYNC));
+ free(__captureN(fd, dir, ahnd, ctx2, e, size, count, ASYNC));
put_ahnd(ahnd);

write(link[1], &fd, sizeof(fd)); /* wake the parent up */
@@ -615,18 +642,27 @@ static void prioinv(int fd, int dir, const intel_ctx_t *ctx,

static void userptr(int fd, int dir)
{
- const intel_ctx_t *ctx = intel_ctx_0(fd);
+ const struct intel_execution_engine2 *e;
+ const intel_ctx_t *ctx;
uint32_t handle;
uint64_t ahnd;
void *ptr;
int obj_size = 4096;

+ /* Find the first available engine: */
+ ctx = intel_ctx_create_all_physical(fd);
+ igt_assert(ctx);
+ for_each_ctx_engine(fd, ctx, e)
+ for_each_if(gem_class_can_store_dword(fd, e->class))
+ break;
+ igt_assert(e);
+
igt_assert(posix_memalign(&ptr, obj_size, obj_size) == 0);
memset(ptr, 0, obj_size);
igt_require(__gem_userptr(fd, ptr, obj_size, 0, 0, &handle) == 0);
ahnd = get_reloc_ahnd(fd, ctx->id);

- __capture1(fd, dir, ahnd, intel_ctx_0(fd), 0, handle, obj_size);
+ __capture1(fd, dir, ahnd, ctx, e, handle, obj_size);

gem_close(fd, handle);
put_ahnd(ahnd);
@@ -684,7 +720,7 @@ igt_main
}

test_each_engine("capture", fd, ctx, e)
- capture(fd, dir, ctx, e->flags);
+ capture(fd, dir, ctx, e);

igt_subtest_f("many-4K-zero") {
igt_require(gem_can_store_dword(fd, 0));
@@ -719,7 +755,7 @@ igt_main
}

test_each_engine("pi", fd, ctx, e)
- prioinv(fd, dir, ctx, e->flags, e->name);
+ prioinv(fd, dir, ctx, e);

igt_fixture {
close(dir);
--
2.25.1