igt: Add gem_ctx_thrash to fill the GGTT with contexts

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

4 files changed, 303 insertions, 0 deletions

diff --git a/tests/.gitignore b/tests/.gitignore
index 0dc044e5..b770a8b0 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -29,6 +29,7 @@ gem_ctx_bad_exec
 gem_ctx_basic
 gem_ctx_create
 gem_ctx_exec
+gem_ctx_thrash
 gem_double_irq_loop
 gem_dummy_reloc_loop
 gem_evict_alignment
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 37627370..b44d4d6c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -50,6 +50,8 @@ gem_close_race_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
 gem_close_race_LDADD = $(LDADD) -lpthread
 gem_ctx_basic_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
 gem_ctx_basic_LDADD = $(LDADD) -lpthread
+gem_ctx_thrash_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
+gem_ctx_thrash_LDADD = $(LDADD) -lpthread
 gem_fence_thrash_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
 gem_fence_thrash_LDADD = $(LDADD) -lpthread
 gem_fence_upload_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 967dc8f8..d15a68b2 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -100,6 +100,7 @@ TESTS_progs = \
 	gem_ctx_bad_destroy \
 	gem_ctx_basic \
 	gem_ctx_create \
+	gem_ctx_thrash \
 	gem_double_irq_loop \
 	gem_exec_big \
 	gem_exec_blt \
diff --git a/tests/gem_ctx_thrash.c b/tests/gem_ctx_thrash.c
new file mode 100644
index 00000000..1f8bb6cc
--- /dev/null
+++ b/tests/gem_ctx_thrash.c
@@ -0,0 +1,299 @@
+/*
+ * 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.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include "ioctl_wrappers.h"
+#include "igt_aux.h"
+#include "intel_chipset.h"
+#include "drmtest.h"
+
+IGT_TEST_DESCRIPTION("Fill the Gobal GTT with context objects and VMs\n");
+
+#define OBJECT_SIZE (1024 * 1024)
+#define NUM_THREADS 8
+
+static int fd;
+static unsigned devid;
+static igt_render_copyfunc_t render_copy;
+
+static dri_bo **all_bo;
+static int num_bo;
+static int bo_per_ctx;
+
+static drm_intel_context **all_ctx;
+static int num_ctx;
+static int ctx_per_thread;
+
+static void xchg_ptr(void *array, unsigned i, unsigned j)
+{
+	void **A = array;
+	swap(A[i], A[j]);
+}
+
+static void xchg_int(void *array, unsigned i, unsigned j)
+{
+	int *A = array;
+	swap(A[i], A[j]);
+}
+
+static int reopen(int _fd)
+{
+	struct stat st;
+	char name[128];
+
+	igt_assert(fstat(_fd, &st) == 0);
+
+	sprintf(name, "/dev/dri/card%u", (unsigned)(st.st_rdev & 0x7f));
+	return open(name, O_RDWR);
+}
+
+static void *thread(void *bufmgr)
+{
+	struct intel_batchbuffer *batch;
+	dri_bo **bo;
+	drm_intel_context **ctx;
+	int c, b;
+
+	batch = intel_batchbuffer_alloc(bufmgr, devid);
+
+	bo = malloc(num_bo * sizeof(dri_bo *));
+	igt_assert(bo);
+	memcpy(bo, all_bo, num_bo * sizeof(dri_bo *));
+
+	ctx = malloc(num_ctx * sizeof(drm_intel_context *));
+	igt_assert(ctx);
+	memcpy(ctx, all_ctx, num_ctx * sizeof(drm_intel_context *));
+	igt_permute_array(ctx, num_ctx, xchg_ptr);
+
+	for (c = 0; c < ctx_per_thread; c++) {
+		igt_permute_array(bo, num_bo, xchg_ptr);
+		for (b = 0; b < bo_per_ctx; b++) {
+			struct igt_buf src, dst;
+
+			src.bo = bo[b % num_bo];
+			src.stride = 4;
+			src.size = OBJECT_SIZE;
+			src.tiling = I915_TILING_NONE;
+
+			dst.bo = bo[(b+1) % num_bo];
+			dst.stride = 4;
+			dst.size = OBJECT_SIZE;
+			dst.tiling = I915_TILING_NONE;
+
+			render_copy(batch, ctx[c % num_ctx],
+				    &src, 0, 0, 1, 1, &dst, 0, 0);
+		}
+	}
+
+	free(ctx);
+	free(bo);
+	intel_batchbuffer_free(batch);
+
+	return NULL;
+}
+
+static int uses_ppgtt(int _fd)
+{
+	struct drm_i915_getparam gp;
+	int val = 0;
+
+	memset(&gp, 0, sizeof(gp));
+	gp.param = 18; /* HAS_ALIASING_PPGTT */
+	gp.value = &val;
+
+	if (drmIoctl(_fd, DRM_IOCTL_I915_GETPARAM, &gp))
+		return 0;
+
+	errno = 0;
+	return val;
+}
+
+static void
+processes(void)
+{
+	int *all_fds;
+	uint64_t aperture;
+	int ppgtt_mode;
+	int ctx_size;
+	int obj_size;
+	int n;
+
+	igt_skip_on_simulation();
+
+	fd = drm_open_any_render();
+	devid = intel_get_drm_devid(fd);
+	aperture = gem_aperture_size(fd);
+
+	ppgtt_mode = uses_ppgtt(fd);
+	igt_require(ppgtt_mode);
+
+	render_copy = igt_get_render_copyfunc(devid);
+	igt_require_f(render_copy, "no render-copy function\n");
+
+	if (ppgtt_mode > 1)
+		ctx_size = aperture >> 10; /* Assume full-ppgtt of maximum size */
+	else
+		ctx_size = 64 << 10; /* Most gen require at least 64k for ctx */
+	num_ctx = 3 * (aperture / ctx_size) / 2;
+	igt_info("Creating %d contexts (assuming of size %d)\n",
+		 num_ctx, ctx_size);
+	intel_require_memory(num_ctx, ctx_size, CHECK_RAM | CHECK_SWAP);
+	all_fds = malloc(num_ctx * sizeof(int));
+	igt_assert(all_fds);
+	for (n = 0; n < num_ctx; n++) {
+		all_fds[n] = reopen(fd);
+		if (all_fds[n] == -1) {
+			int err = errno;
+			while (n--)
+				close(all_fds[n]);
+			free(all_fds);
+			errno = err;
+			igt_assert(0);
+		}
+	}
+
+	num_bo = 2 * num_ctx;
+	obj_size = (2 * aperture / num_bo + 4095) & -4096;
+	igt_info("Creating %d surfaces (of size %d)\n", num_bo, obj_size);
+	intel_require_memory(num_bo, obj_size, CHECK_RAM);
+
+	igt_fork(child, NUM_THREADS) {
+		drm_intel_bufmgr *bufmgr;
+		struct intel_batchbuffer *batch;
+		int c;
+
+		igt_permute_array(all_fds, num_ctx, xchg_int);
+
+		for (c = 0; c < num_ctx; c++) {
+			struct igt_buf src, dst;
+
+			bufmgr = drm_intel_bufmgr_gem_init(all_fds[c], 4096);
+			igt_assert(bufmgr);
+			batch = intel_batchbuffer_alloc(bufmgr, devid);
+
+			src.bo = drm_intel_bo_alloc(bufmgr, "", obj_size, 0);
+			igt_assert(src.bo);
+			src.stride = 4;
+			src.size = obj_size;
+			src.tiling = I915_TILING_NONE;
+
+			dst.bo = drm_intel_bo_alloc(bufmgr, "", obj_size, 0);
+			igt_assert(dst.bo);
+			dst.stride = 4;
+			dst.size = obj_size;
+			dst.tiling = I915_TILING_NONE;
+
+			render_copy(batch, NULL,
+				    &src, 0, 0, 1, 1, &dst, 0, 0);
+
+			intel_batchbuffer_free(batch);
+			drm_intel_bo_unreference(src.bo);
+			drm_intel_bo_unreference(dst.bo);
+			drm_intel_bufmgr_destroy(bufmgr);
+		}
+	}
+
+	for (n = 0; n < num_ctx; n++)
+		close(all_fds[n]);
+	free(all_fds);
+	close(fd);
+}
+
+static void
+threads(void)
+{
+	pthread_t threads[NUM_THREADS];
+	drm_intel_bufmgr *bufmgr;
+	uint64_t aperture;
+	int ppgtt_mode;
+	int ctx_size;
+	int n;
+
+	igt_skip_on_simulation();
+
+	fd = drm_open_any_render();
+	devid = intel_get_drm_devid(fd);
+	aperture = gem_aperture_size(fd);
+
+	ppgtt_mode = uses_ppgtt(fd);
+	igt_require(ppgtt_mode);
+
+	render_copy = igt_get_render_copyfunc(devid);
+	igt_require_f(render_copy, "no render-copy function\n");
+
+	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+	igt_assert(bufmgr);
+
+	if (ppgtt_mode > 1)
+		ctx_size = aperture >> 10; /* Assume full-ppgtt of maximum size */
+	else
+		ctx_size = 64 << 10; /* Most gen require at least 64k for ctx */
+	num_ctx = 3 * (aperture / ctx_size) / 2;
+	igt_info("Creating %d contexts (assuming of size %d)\n",
+		 num_ctx, ctx_size);
+	intel_require_memory(num_ctx, ctx_size, CHECK_RAM | CHECK_SWAP);
+	all_ctx = malloc(num_ctx * sizeof(drm_intel_context *));
+	igt_assert(all_ctx);
+	for (n = 0; n < num_ctx; n++) {
+		all_ctx[n] = drm_intel_gem_context_create(bufmgr);
+		igt_assert(all_ctx[n]);
+	}
+
+	num_bo = 3 * (aperture / OBJECT_SIZE) / 2;
+	igt_info("Creating %d surfaces (of size %d)\n", num_bo, OBJECT_SIZE);
+	intel_require_memory(num_bo, OBJECT_SIZE, CHECK_RAM);
+	all_bo = malloc(num_bo * sizeof(dri_bo *));
+	igt_assert(all_bo);
+	for (n = 0; n < num_bo; n++) {
+		all_bo[n] = drm_intel_bo_alloc(bufmgr, "", OBJECT_SIZE, 0);
+		igt_assert(all_bo[n]);
+	}
+
+	ctx_per_thread = 5 * num_ctx / NUM_THREADS / 4;
+	bo_per_ctx = 2 * num_bo / ctx_per_thread;
+
+	for (n = 0; n < NUM_THREADS; n++)
+		pthread_create(&threads[n], NULL, thread, bufmgr);
+
+	for (n = 0; n < NUM_THREADS; n++)
+		pthread_join(threads[n], NULL);
+
+	drm_intel_bufmgr_destroy(bufmgr);
+	close(fd);
+}
+
+igt_main
+{
+	igt_subtest("processes")
+		processes();
+
+	igt_subtest("threads")
+		threads();
+}