Exercise O(N^2) behaviour in reading the error state, and push it to the
extreme.
Reported-by: Jason Ekstrand <jason@xxxxxxxxxxxxxx>
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
tests/gem_exec_capture.c | 155 ++++++++++++++++++++++++++++++++++++++-
1 file changed, 152 insertions(+), 3 deletions(-)
diff --git a/tests/gem_exec_capture.c b/tests/gem_exec_capture.c
index 2dc06ce43..de69da800 100644
--- a/tests/gem_exec_capture.c
+++ b/tests/gem_exec_capture.c
@@ -23,6 +23,7 @@
#include "igt.h"
#include "igt_device.h"
+#include "igt_rand.h"
#include "igt_sysfs.h"
#define LOCAL_OBJECT_CAPTURE (1 << 7)
@@ -57,7 +58,7 @@ static void check_error_state(int dir, struct drm_i915_gem_exec_object2 *obj)
igt_assert(found);
}
-static void __capture(int fd, int dir, unsigned ring, uint32_t target)
+static void __capture1(int fd, int dir, unsigned ring, uint32_t target)
{
const int gen = intel_gen(intel_get_drm_devid(fd));
struct drm_i915_gem_exec_object2 obj[4];
@@ -167,10 +168,148 @@ static void capture(int fd, int dir, unsigned ring)
uint32_t handle;
handle = gem_create(fd, 4096);
- __capture(fd, dir, ring, handle);
+ __capture1(fd, dir, ring, handle);
gem_close(fd, handle);
}
+static void __captureN(int fd, int dir, unsigned ring,
+ unsigned int size, int count, unsigned int flags)
+#define RANDOM 0x1
+{
+ const int gen = intel_gen(intel_get_drm_devid(fd));
+ struct drm_i915_gem_exec_object2 *obj;
+ struct drm_i915_gem_relocation_entry reloc[2];
+ struct drm_i915_gem_execbuffer2 execbuf;
+ uint32_t *batch, *seqno;
+ int i;
+
+ obj = calloc(count + 2, sizeof(*obj));
+ igt_assert(obj);
+
+ obj[0].handle = gem_create(fd, 4096);
+ for (i = 0; i < count; i++) {
+ obj[i + 1].handle = gem_create(fd, size);
+ obj[i + 1].flags = LOCAL_OBJECT_CAPTURE;
+ if (flags & RANDOM) {
+ uint32_t *ptr;
+
+ ptr = gem_mmap__cpu(fd, obj[i + 1].handle,
+ 0, size, PROT_WRITE);
+ for (unsigned int n = 0; n < size / sizeof(*ptr); n++)
+ ptr[n] = hars_petruska_f54_1_random_unsafe();
+ munmap(ptr, size);
+ }
+ }
+
+ obj[count + 1].handle = gem_create(fd, 4096);
+ obj[count + 1].relocs_ptr = (uintptr_t)reloc;
+ obj[count + 1].relocation_count = ARRAY_SIZE(reloc);
+
+ memset(reloc, 0, sizeof(reloc));
+ reloc[0].target_handle = obj[count + 1].handle; /* recurse */
+ reloc[0].presumed_offset = 0;
+ reloc[0].offset = 5*sizeof(uint32_t);
+ reloc[0].delta = 0;
+ reloc[0].read_domains = I915_GEM_DOMAIN_COMMAND;
+ reloc[0].write_domain = 0;
+
+ reloc[1].target_handle = obj[0].handle; /* breadcrumb */
+ reloc[1].presumed_offset = 0;
+ reloc[1].offset = sizeof(uint32_t);
+ reloc[1].delta = 0;
+ reloc[1].read_domains = I915_GEM_DOMAIN_RENDER;
+ reloc[1].write_domain = I915_GEM_DOMAIN_RENDER;
+
+ seqno = gem_mmap__wc(fd, obj[0].handle, 0, 4096, PROT_READ);
+ gem_set_domain(fd, obj[0].handle,
+ I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
+
+ batch = gem_mmap__cpu(fd, obj[count + 1].handle, 0, 4096, PROT_WRITE);
+ gem_set_domain(fd, obj[count + 1].handle,
+ I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU);
+
+ i = 0;
+ batch[i] = MI_STORE_DWORD_IMM | (gen < 6 ? 1 << 22 : 0);
+ if (gen >= 8) {
+ batch[++i] = 0;
+ batch[++i] = 0;
+ } else if (gen >= 4) {
+ batch[++i] = 0;
+ batch[++i] = 0;
+ reloc[1].offset += sizeof(uint32_t);
+ } else {
+ batch[i]--;
+ batch[++i] = 0;
+ }
+ batch[++i] = 0xc0ffee;
+ if (gen < 3)
+ batch[++i] = MI_NOOP;
+
+ batch[++i] = MI_BATCH_BUFFER_START; /* not crashed? try again! */
+ if (gen >= 8) {
+ batch[i] |= 1 << 8 | 1;
+ batch[++i] = 0;
+ batch[++i] = 0;
+ } else if (gen >= 6) {
+ batch[i] |= 1 << 8;
+ batch[++i] = 0;
+ } else {
+ batch[i] |= 2 << 6;
+ batch[++i] = 0;
+ if (gen < 4) {
+ batch[i] |= 1;
+ reloc[0].delta = 1;
+ }
+ }
+ munmap(batch, 4096);
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)obj;
+ execbuf.buffer_count = count + 2;
+ execbuf.flags = ring;
+ if (gen > 3 && gen < 6)
+ execbuf.flags |= I915_EXEC_SECURE;
+ gem_execbuf(fd, &execbuf);
+
+ /* Wait for the request to start */
+ while (*(volatile uint32_t *)seqno != 0xc0ffee)
+ igt_assert(gem_bo_busy(fd, obj[0].handle));
+ munmap(seqno, 4096);
+
+ igt_force_gpu_reset(fd);
+
+ gem_sync(fd, obj[count + 1].handle);
+ gem_close(fd, obj[count + 1].handle);
+ for (i = 0; i < count; i++)
+ gem_close(fd, obj[i + 1].handle);
+ gem_close(fd, obj[0].handle);
+}
+
+static void many(int fd, int dir, unsigned int flags)
+{
+ uint64_t ram, gtt;
+ unsigned long count;
+ char *error;
+
+ gtt = (gem_aperture_size(fd) >> 20) / 4;
+ ram = intel_get_avail_ram_mb() / 4;
+ igt_debug("Available objects in GTT:%"PRIu64", RAM:%"PRIu64"\n",
+ gtt, ram);
+
+ count = min(gtt, ram);
+ igt_require(count > 1);
+
+ intel_require_memory(count, 2 << 20, CHECK_RAM);
+
+ __captureN(fd, dir, 0, 2 << 20, count, flags);
+
+ error = igt_sysfs_get(dir, "error");
+ igt_sysfs_set(dir, "error", "Begone!");
+
+ igt_assert(error);
+ igt_debug("%s\n", error);
+}
+
static void userptr(int fd, int dir)
{
uint32_t handle;
@@ -179,7 +318,7 @@ static void userptr(int fd, int dir)
igt_assert(posix_memalign(&ptr, 4096, 4096) == 0);
igt_require(__gem_userptr(fd, ptr, 4096, 0, 0, &handle) == 0);
- __capture(fd, dir, 0, handle);
+ __capture1(fd, dir, 0, handle);
gem_close(fd, handle);
free(ptr);
@@ -236,6 +375,16 @@ igt_main
}
}
+ igt_subtest_f("many-zero") {
+ igt_require(gem_can_store_dword(fd, 0));
+ many(fd, dir, 0);
+ }
+
+ igt_subtest_f("many-random") {
+ igt_require(gem_can_store_dword(fd, 0));
+ many(fd, dir, RANDOM);
+ }
+
/* And check we can read from different types of objects */
igt_subtest_f("userptr") {
--
2.18.0
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