1 files changed, 405 insertions, 0 deletions
diff --git a/tests/i915/gem_fence_upload.c b/tests/i915/gem_fence_upload.c
new file mode 100644
index 00000000..f3b0e62f
--- /dev/null
+++ b/tests/i915/gem_fence_upload.c
@@ -0,0 +1,405 @@
+/*
+ * Copyright © 2014 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 "config.h"
+
+#include "igt.h"
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <pthread.h>
+#include "drm.h"
+#include "i915_drm.h"
+
+#define OBJECT_SIZE (1024*1024) /* restricted to 1MiB alignment on i915 fences */
+
+static double elapsed(const struct timeval *start,
+		      const struct timeval *end)
+{
+	return (end->tv_sec - start->tv_sec) + 1e-6*(end->tv_usec - start->tv_usec);
+}
+
+static void performance(void)
+{
+	int n, loop, count;
+	int fd, num_fences;
+	double linear[2], tiled[2];
+
+	fd = drm_open_driver(DRIVER_INTEL);
+
+	num_fences = gem_available_fences(fd);
+	igt_require(num_fences > 0);
+
+	for (count = 2; count < 4*num_fences; count *= 2) {
+		struct timeval start, end;
+		uint32_t handle[count];
+		void *ptr[count];
+
+		for (n = 0; n < count; n++) {
+			handle[n] = gem_create(fd, OBJECT_SIZE);
+			ptr[n] = gem_mmap__gtt(fd, handle[n], OBJECT_SIZE, PROT_READ | PROT_WRITE);
+		}
+
+		gettimeofday(&start, NULL);
+		for (loop = 0; loop < 1024; loop++) {
+			for (n = 0; n < count; n++)
+				memset(ptr[n], 0, OBJECT_SIZE);
+		}
+		gettimeofday(&end, NULL);
+
+		linear[count != 2] = count * loop / elapsed(&start, &end);
+		igt_info("Upload rate for %d linear surfaces:	%7.3fMiB/s\n", count, linear[count != 2]);
+
+		for (n = 0; n < count; n++)
+			gem_set_tiling(fd, handle[n], I915_TILING_X, 1024);
+
+		gettimeofday(&start, NULL);
+		for (loop = 0; loop < 1024; loop++) {
+			for (n = 0; n < count; n++)
+				memset(ptr[n], 0, OBJECT_SIZE);
+		}
+		gettimeofday(&end, NULL);
+
+		tiled[count != 2] = count * loop / elapsed(&start, &end);
+		igt_info("Upload rate for %d tiled surfaces:	%7.3fMiB/s\n", count, tiled[count != 2]);
+
+		for (n = 0; n < count; n++) {
+			munmap(ptr[n], OBJECT_SIZE);
+			gem_close(fd, handle[n]);
+		}
+
+	}
+
+	errno = 0;
+	igt_assert(linear[1] > 0.75 * linear[0]);
+	igt_assert(tiled[1] > 0.75 * tiled[0]);
+}
+
+struct thread_performance {
+	pthread_t thread;
+	int id, count, direction, loops;
+	void **ptr;
+};
+
+static void *read_thread_performance(void *closure)
+{
+	struct thread_performance *t = closure;
+	uint32_t x = 0;
+	int n, m;
+
+	for (n = 0; n < t->loops; n++) {
+		uint32_t *src = t->ptr[rand() % t->count];
+		src += (rand() % 256) * 4096 / 4;
+		for (m = 0; m < 4096/4; m++)
+			x += src[m];
+	}
+
+	return (void *)(uintptr_t)x;
+}
+
+static void *write_thread_performance(void *closure)
+{
+	struct thread_performance *t = closure;
+	int n;
+
+	for (n = 0; n < t->loops; n++) {
+		uint32_t *dst = t->ptr[rand() % t->count];
+		dst += (rand() % 256) * 4096 / 4;
+		memset(dst, 0, 4096);
+	}
+
+	return NULL;
+}
+
+#define READ (1<<0)
+#define WRITE (1<<1)
+static const char *direction_string(unsigned mask)
+{
+	switch (mask) {
+	case READ: return "Download";
+	case WRITE: return "Upload";
+	case READ | WRITE: return "Combined";
+	default: return "Unknown";
+	}
+}
+static void thread_performance(unsigned mask)
+{
+	const int loops = 4096;
+	int n, count;
+	int fd, num_fences;
+	double linear[2], tiled[2];
+
+	fd = drm_open_driver(DRIVER_INTEL);
+
+	num_fences = gem_available_fences(fd);
+	igt_require(num_fences > 0);
+
+	for (count = 2; count < 4*num_fences; count *= 2) {
+		const int nthreads = (mask & READ ? count : 0) + (mask & WRITE ? count : 0);
+		struct timeval start, end;
+		struct thread_performance readers[count];
+		struct thread_performance writers[count];
+		uint32_t handle[count];
+		void *ptr[count];
+
+		for (n = 0; n < count; n++) {
+			handle[n] = gem_create(fd, OBJECT_SIZE);
+			ptr[n] = gem_mmap__gtt(fd, handle[n], OBJECT_SIZE, PROT_READ | PROT_WRITE);
+
+			if (mask & READ) {
+				readers[n].id = n;
+				readers[n].direction = READ;
+				readers[n].ptr = ptr;
+				readers[n].count = count;
+				readers[n].loops = loops;
+			}
+
+			if (mask & WRITE) {
+				writers[n].id = count - n - 1;
+				writers[n].direction = WRITE;
+				writers[n].ptr = ptr;
+				writers[n].count = count;
+				writers[n].loops = loops;
+			}
+		}
+
+		gettimeofday(&start, NULL);
+		for (n = 0; n < count; n++) {
+			if (mask & READ)
+				pthread_create(&readers[n].thread, NULL, read_thread_performance, &readers[n]);
+			if (mask & WRITE)
+				pthread_create(&writers[n].thread, NULL, write_thread_performance, &writers[n]);
+		}
+		for (n = 0; n < count; n++) {
+			if (mask & READ)
+				pthread_join(readers[n].thread, NULL);
+			if (mask & WRITE)
+				pthread_join(writers[n].thread, NULL);
+		}
+		gettimeofday(&end, NULL);
+
+		linear[count != 2] = nthreads * loops / elapsed(&start, &end) / (OBJECT_SIZE / 4096);
+		igt_info("%s rate for %d linear surfaces, %d threads:	%7.3fMiB/s\n", direction_string(mask), count, nthreads, linear[count != 2]);
+
+		for (n = 0; n < count; n++)
+			gem_set_tiling(fd, handle[n], I915_TILING_X, 1024);
+
+		gettimeofday(&start, NULL);
+		for (n = 0; n < count; n++) {
+			if (mask & READ)
+				pthread_create(&readers[n].thread, NULL, read_thread_performance, &readers[n]);
+			if (mask & WRITE)
+				pthread_create(&writers[n].thread, NULL, write_thread_performance, &writers[n]);
+		}
+		for (n = 0; n < count; n++) {
+			if (mask & READ)
+				pthread_join(readers[n].thread, NULL);
+			if (mask & WRITE)
+				pthread_join(writers[n].thread, NULL);
+		}
+		gettimeofday(&end, NULL);
+
+		tiled[count != 2] = nthreads * loops / elapsed(&start, &end) / (OBJECT_SIZE / 4096);
+		igt_info("%s rate for %d tiled surfaces, %d threads:	%7.3fMiB/s\n", direction_string(mask), count, nthreads, tiled[count != 2]);
+
+		for (n = 0; n < count; n++) {
+			munmap(ptr[n], OBJECT_SIZE);
+			gem_close(fd, handle[n]);
+		}
+	}
+
+	errno = 0;
+	igt_assert(linear[1] > 0.75 * linear[0]);
+	igt_assert(tiled[1] > 0.75 * tiled[0]);
+}
+
+struct thread_contention {
+	pthread_t thread;
+	uint32_t handle;
+	int loops, fd;
+};
+static void *no_contention(void *closure)
+{
+	struct thread_contention *t = closure;
+	int n;
+
+	for (n = 0; n < t->loops; n++) {
+		uint32_t *ptr = gem_mmap__gtt(t->fd, t->handle, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+		memset(ptr + (rand() % 256) * 4096 / 4, 0, 4096);
+		munmap(ptr, OBJECT_SIZE);
+	}
+
+	return NULL;
+}
+
+static void *wc_mmap(void *closure)
+{
+	struct thread_contention *t = closure;
+	int n;
+
+	for (n = 0; n < t->loops; n++) {
+		uint32_t *ptr = gem_mmap__wc(t->fd, t->handle, 0, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+		memset(ptr + (rand() % 256) * 4096 / 4, 0, 4096);
+		munmap(ptr, OBJECT_SIZE);
+	}
+
+	return NULL;
+}
+
+static void thread_contention(void)
+{
+	const int loops = 4096;
+	int n, count;
+	int fd, num_fences;
+	double linear[2], tiled[2];
+
+	fd = drm_open_driver(DRIVER_INTEL);
+
+	num_fences = gem_available_fences(fd);
+	igt_require(num_fences > 0);
+
+	for (count = 1; count < 4*num_fences; count *= 2) {
+		struct timeval start, end;
+		struct thread_contention threads[count];
+
+		for (n = 0; n < count; n++) {
+			threads[n].handle = gem_create(fd, OBJECT_SIZE);
+			threads[n].loops = loops;
+			threads[n].fd = fd;
+		}
+
+		gettimeofday(&start, NULL);
+		for (n = 0; n < count; n++)
+			pthread_create(&threads[n].thread, NULL, no_contention, &threads[n]);
+		for (n = 0; n < count; n++)
+			pthread_join(threads[n].thread, NULL);
+		gettimeofday(&end, NULL);
+
+		linear[count != 2] = count * loops / elapsed(&start, &end) / (OBJECT_SIZE / 4096);
+		igt_info("Contended upload rate for %d linear threads:	%7.3fMiB/s\n", count, linear[count != 2]);
+
+		for (n = 0; n < count; n++)
+			gem_set_tiling(fd, threads[n].handle, I915_TILING_X, 1024);
+
+		gettimeofday(&start, NULL);
+		for (n = 0; n < count; n++)
+			pthread_create(&threads[n].thread, NULL, no_contention, &threads[n]);
+		for (n = 0; n < count; n++)
+			pthread_join(threads[n].thread, NULL);
+		gettimeofday(&end, NULL);
+
+		tiled[count != 2] = count * loops / elapsed(&start, &end) / (OBJECT_SIZE / 4096);
+		igt_info("Contended upload rate for %d tiled threads:	%7.3fMiB/s\n", count, tiled[count != 2]);
+
+		for (n = 0; n < count; n++) {
+			gem_close(fd, threads[n].handle);
+		}
+	}
+
+	errno = 0;
+	igt_assert(linear[1] > 0.75 * linear[0]);
+	igt_assert(tiled[1] > 0.75 * tiled[0]);
+}
+
+static void wc_contention(void)
+{
+	const int loops = 4096;
+	int n, count;
+	int fd, num_fences;
+	double linear[2], tiled[2];
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	gem_require_mmap_wc(fd);
+
+	num_fences = gem_available_fences(fd);
+	igt_require(num_fences > 0);
+
+	for (count = 1; count < 4*num_fences; count *= 2) {
+		struct timeval start, end;
+		struct thread_contention threads[count];
+
+		for (n = 0; n < count; n++) {
+			threads[n].handle = gem_create(fd, OBJECT_SIZE);
+			threads[n].loops = loops;
+			threads[n].fd = fd;
+		}
+
+		gettimeofday(&start, NULL);
+		for (n = 0; n < count; n++)
+			pthread_create(&threads[n].thread, NULL, wc_mmap, &threads[n]);
+		for (n = 0; n < count; n++)
+			pthread_join(threads[n].thread, NULL);
+		gettimeofday(&end, NULL);
+
+		linear[count != 2] = count * loops / elapsed(&start, &end) / (OBJECT_SIZE / 4096);
+		igt_info("Contended upload rate for %d linear threads/wc:	%7.3fMiB/s\n", count, linear[count != 2]);
+
+		for (n = 0; n < count; n++)
+			gem_set_tiling(fd, threads[n].handle, I915_TILING_X, 1024);
+
+		gettimeofday(&start, NULL);
+		for (n = 0; n < count; n++)
+			pthread_create(&threads[n].thread, NULL, wc_mmap, &threads[n]);
+		for (n = 0; n < count; n++)
+			pthread_join(threads[n].thread, NULL);
+		gettimeofday(&end, NULL);
+
+		tiled[count != 2] = count * loops / elapsed(&start, &end) / (OBJECT_SIZE / 4096);
+		igt_info("Contended upload rate for %d tiled threads/wc:	%7.3fMiB/s\n", count, tiled[count != 2]);
+
+		for (n = 0; n < count; n++) {
+			gem_close(fd, threads[n].handle);
+		}
+	}
+
+	errno = 0;
+	igt_assert(linear[1] > 0.75 * linear[0]);
+	igt_assert(tiled[1] > 0.75 * tiled[0]);
+}
+
+igt_main
+{
+	igt_skip_on_simulation();
+
+	igt_subtest("performance")
+		performance();
+	igt_subtest("thread-contention")
+		thread_contention();
+	igt_subtest("wc-contention")
+		wc_contention();
+	igt_subtest("thread-performance-read")
+		thread_performance(READ);
+	igt_subtest("thread-performance-write")
+		thread_performance(WRITE);
+	igt_subtest("thread-performance-both")
+		thread_performance(READ | WRITE);
+}