igt: Add a basic test to stress allocation of batches

Run for 20s and don't expect to crash from memory exhaustion or sillies.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

tests/Makefile.sources

@@ -33,6 +33,7 @@ TESTS_progs_M = \
 	gem_exec_alignment \
 	gem_exec_bad_domains \
 	gem_exec_basic \
+	gem_exec_create \
 	gem_exec_faulting_reloc \
 	gem_exec_nop \
 	gem_exec_params \

tests/gem_exec_create.c

@@ -0,0 +1,145 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#include "igt.h"
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <time.h>
+#include "drm.h"
+
+#define LOCAL_I915_EXEC_NO_RELOC (1<<11)
+#define LOCAL_I915_EXEC_HANDLE_LUT (1<<12)
+
+#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 double elapsed(const struct timespec *start, const struct timespec *end)
+{
+	return ((end->tv_sec - start->tv_sec) +
+		(end->tv_nsec - start->tv_nsec)*1e-9);
+}
+
+static bool ignore_engine(int fd, unsigned engine)
+{
+	if (engine == 0)
+		return true;
+
+	if (gem_has_bsd2(fd) && engine == I915_EXEC_BSD)
+		return true;
+
+	return false;
+}
+
+static void all(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, now;
+	unsigned engines[16];
+	unsigned nengine;
+	unsigned engine;
+	unsigned long count;
+	double time;
+
+	nengine = 0;
+	for_each_engine(fd, engine) {
+		if (ignore_engine(fd, engine))
+			continue;
+
+		engines[nengine++] = engine;
+	}
+	igt_require(nengine);
+
+	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;
+	execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
+	execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
+	if (__gem_execbuf(fd, &execbuf)) {
+		execbuf.flags = 0;
+		gem_execbuf(fd, &execbuf);
+	}
+	gem_sync(fd, obj.handle);
+	gem_close(fd, obj.handle);
+
+	count = 0;
+	clock_gettime(CLOCK_MONOTONIC, &start);
+	do {
+		for (int loop = 0; loop < 1024; loop++) {
+			for (int n = 0; n < nengine; n++) {
+				obj.handle =  gem_create(fd, 4096);
+				gem_write(fd, obj.handle, 0, &bbe, sizeof(bbe));
+				execbuf.flags &= ~ENGINE_FLAGS;
+				execbuf.flags |= engines[n];
+				gem_execbuf(fd, &execbuf);
+				gem_close(fd, obj.handle);
+			}
+		}
+		count += nengine * 1024;
+		clock_gettime(CLOCK_MONOTONIC, &now);
+	} while (elapsed(&start, &now) < timeout); /* Hang detection ~120s */
+	gem_quiescent_gpu(fd);
+	clock_gettime(CLOCK_MONOTONIC, &now);
+
+	time = elapsed(&start, &now) / count;
+	igt_info("All (%d engines): %'lu cycles, average %.3fus per cycle\n",
+		 nengine, count, 1e6*time);
+}
+
+igt_main
+{
+	int device = -1;
+
+	igt_fixture
+		device = drm_open_driver(DRIVER_INTEL);
+
+	igt_fork_hang_detector(device);
+
+	igt_subtest("basic")
+		all(device, 20);
+
+	igt_stop_hang_detector();
+
+	igt_fixture
+		close(device);
+}