The goal is compare the speed of copying to and from a LLC bo using
either the CPU or GPU.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
lib/drmtest.c | 14 +++
lib/drmtest.h | 1 +
tests/.gitignore | 1 +
tests/Makefile.am | 1 +
tests/llc_exec_blt.c | 278 ++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 295 insertions(+)
create mode 100644 tests/llc_exec_blt.c
diff --git a/lib/drmtest.c b/lib/drmtest.c
index cdf46aa..feab1cb 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -74,6 +74,20 @@ bool gem_uses_aliasing_ppgtt(int fd)
return val;
}
+bool gem_has_llc(int fd)
+{
+ struct drm_i915_getparam gp;
+ int val;
+
+ gp.param = 17; /* HAS_LLC */
+ gp.value = &val;
+
+ if (ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp)))
+ return false;
+
+ return val != 0;
+}
+
int gem_available_fences(int fd)
{
struct drm_i915_getparam gp;
diff --git a/lib/drmtest.h b/lib/drmtest.h
index 4021104..fcc875d 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -63,6 +63,7 @@ int gem_madvise(int fd, uint32_t handle, int state);
/* feature test helpers */
bool gem_uses_aliasing_ppgtt(int fd);
+bool gem_has_llc(int fd);
int gem_available_fences(int fd);
/* generally useful helpers */
diff --git a/tests/.gitignore b/tests/.gitignore
index f486a87..fce1497 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -14,6 +14,7 @@ gem_double_irq_loop
gem_dummy_reloc_loop
gem_exec_bad_domains
gem_exec_blt
+llc_exec_blt
gem_exec_faulting_reloc
gem_exec_nop
gem_fenced_exec_thrash
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 5a64660..dcaa1d4 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -13,6 +13,7 @@ TESTS_progs = \
gem_gtt_concurrent_blit \
gem_exec_nop \
gem_exec_blt \
+ llc_exec_blt \
gem_exec_bad_domains \
gem_exec_faulting_reloc \
gem_flink \
diff --git a/tests/llc_exec_blt.c b/tests/llc_exec_blt.c
new file mode 100644
index 0000000..9a18b46
--- /dev/null
+++ b/tests/llc_exec_blt.c
@@ -0,0 +1,278 @@
+/*
+ * 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 at chris-wilson.co.uk>
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_chipset.h"
+#include "intel_gpu_tools.h"
+
+#define OBJECT_SIZE 16384
+#define PITCH 4096
+
+#define COPY_BLT_CMD (2<<29|0x53<<22|0x6)
+#define BLT_WRITE_ALPHA (1<<21)
+#define BLT_WRITE_RGB (1<<20)
+#define BLT_SRC_TILED (1<<15)
+#define BLT_DST_TILED (1<<11)
+
+static int gem_tiled_blt(uint32_t *b,
+ uint32_t src,
+ uint32_t dst,
+ uint32_t tiling,
+ uint32_t length,
+ struct drm_i915_gem_relocation_entry *reloc)
+{
+ int height = length / PITCH;
+ int pitch;
+
+ assert(height < (1<<16));
+
+ pitch = PITCH;
+ if (tiling & BLT_DST_TILED)
+ pitch /= 4;
+
+ b[0] = COPY_BLT_CMD | BLT_WRITE_ALPHA | BLT_WRITE_RGB | tiling;
+ b[1] = 0xcc << 16 | 1 << 25 | 1 << 24 | pitch;
+ b[2] = 0;
+ b[3] = height << 16 | PITCH >> 2;
+ b[4] = 0;
+
+ reloc->offset = 4 * sizeof(uint32_t);
+ reloc->delta = 0;
+ reloc->target_handle = dst;
+ reloc->read_domains = I915_GEM_DOMAIN_RENDER;
+ reloc->write_domain = I915_GEM_DOMAIN_RENDER;
+ reloc->presumed_offset = 0;
+ reloc++;
+
+ pitch = PITCH;
+ if (tiling & BLT_SRC_TILED)
+ pitch /= 4;
+
+ b[5] = 0;
+ b[6] = pitch;
+ b[7] = 0;
+ reloc->offset = 7 * sizeof(uint32_t);
+ reloc->delta = 0;
+ reloc->target_handle = src;
+ reloc->read_domains = I915_GEM_DOMAIN_RENDER;
+ reloc->write_domain = 0;
+ reloc->presumed_offset = 0;
+ reloc++;
+
+ b[8] = MI_BATCH_BUFFER_END;
+ b[9] = 0;
+
+ return 10 * sizeof(uint32_t);
+}
+
+static int gem_exec(int fd, struct drm_i915_gem_execbuffer2 *execbuf, int loops)
+{
+ int ret = 0;
+
+ while (loops-- && ret == 0) {
+ ret = drmIoctl(fd,
+ DRM_IOCTL_I915_GEM_EXECBUFFER2,
+ execbuf);
+ }
+
+ return ret;
+}
+
+static double elapsed(const struct timeval *start,
+ const struct timeval *end,
+ int loop)
+{
+ return (1e6*(end->tv_sec - start->tv_sec) + (end->tv_usec - start->tv_usec))/loop;
+}
+
+static const char *bytes_per_sec(char *buf, double v)
+{
+ const char *order[] = {
+ "",
+ "KiB",
+ "MiB",
+ "GiB",
+ "TiB",
+ "PiB",
+ NULL,
+ }, **o = order;
+
+ while (v > 1024 && o[1]) {
+ v /= 1024;
+ o++;
+ }
+ sprintf(buf, "%.1f%s/s", v, *o);
+ return buf;
+}
+
+static void run(int object_size)
+{
+ struct drm_i915_gem_execbuffer2 execbuf;
+ struct drm_i915_gem_exec_object2 exec[3];
+ struct drm_i915_gem_relocation_entry reloc[4];
+ uint32_t buf[20];
+ uint32_t handle, gtt, llc;
+ int fd, len, count;
+ int ring;
+
+ fd = drm_open_any();
+ if (!gem_has_llc(fd))
+ return;
+
+ handle = gem_create(fd, 4096);
+ gtt = gem_create(fd, object_size);
+ gem_set_tiling(fd, gtt, I915_TILING_X, PITCH);
+ llc = gem_create(fd, object_size);
+
+ len = gem_tiled_blt(buf, gtt, llc, BLT_SRC_TILED, object_size, reloc);
+ gem_write(fd, handle, 0, buf, len);
+
+ memset(exec, 0, sizeof(exec));
+ exec[0].handle = gtt;
+ exec[1].handle = llc;
+ exec[2].handle = handle;
+ exec[2].relocation_count = 2;
+ exec[2].relocs_ptr = (uintptr_t)reloc;
+
+ ring = 0;
+ if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+ ring = I915_EXEC_BLT;
+
+ execbuf.buffers_ptr = (uintptr_t)exec;
+ execbuf.buffer_count = 3;
+ execbuf.batch_start_offset = 0;
+ execbuf.batch_len = len;
+ execbuf.cliprects_ptr = 0;
+ execbuf.num_cliprects = 0;
+ execbuf.DR1 = 0;
+ execbuf.DR4 = 0;
+ execbuf.flags = ring;
+ execbuf.rsvd1 = 0;
+ execbuf.rsvd2 = 0;
+
+ for (count = 1; count <= 1<<17; count <<= 1) {
+ struct timeval start, end;
+
+ gettimeofday(&start, NULL);
+ if (gem_exec(fd, &execbuf, count))
+ exit(1);
+ gem_sync(fd, handle);
+ gettimeofday(&end, NULL);
+ printf("Time to blt from GTT to LLC %d bytes x %6d: %7.3f?s, %s\n",
+ object_size, count,
+ elapsed(&start, &end, count),
+ bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
+ fflush(stdout);
+ }
+
+ len = gem_tiled_blt(buf, llc, gtt, BLT_DST_TILED, object_size, reloc);
+ gem_write(fd, handle, 0, buf, len);
+
+ for (count = 1; count <= 1<<17; count <<= 1) {
+ struct timeval start, end;
+
+ gettimeofday(&start, NULL);
+ if (gem_exec(fd, &execbuf, count))
+ exit(1);
+ gem_sync(fd, handle);
+ gettimeofday(&end, NULL);
+ printf("Time to blt from LLC to GTT %d bytes x %6d: %7.3f?s, %s\n",
+ object_size, count,
+ elapsed(&start, &end, count),
+ bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
+ fflush(stdout);
+ }
+
+ {
+ void *ptr_llc = gem_mmap__cpu(fd, llc, object_size, PROT_READ | PROT_WRITE);
+ void *ptr_gtt = gem_mmap__gtt(fd, gtt, object_size, PROT_READ | PROT_WRITE);
+ int c;
+
+ for (count = 1; count <= 32; count <<= 1) {
+ struct timeval start, end;
+
+ gettimeofday(&start, NULL);
+ for (c = 0; c < count; c++)
+ memcpy(ptr_llc, ptr_gtt, object_size);
+ gettimeofday(&end, NULL);
+
+ printf("Time to copy from GTT to LLC %d bytes x %6d: %7.3f?s, %s\n",
+ object_size, count,
+ elapsed(&start, &end, count),
+ bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
+ }
+ fflush(stdout);
+
+ for (count = 1; count <= 32; count <<= 1) {
+ struct timeval start, end;
+ gettimeofday(&start, NULL);
+ for (c = 0; c < count; c++)
+ memcpy(ptr_gtt, ptr_llc, object_size);
+ gettimeofday(&end, NULL);
+
+ printf("Time to copy from LLC to GTT %d bytes x %6d: %7.3f?s, %s\n",
+ object_size, count,
+ elapsed(&start, &end, count),
+ bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
+ fflush(stdout);
+ }
+ }
+
+ gem_close(fd, handle);
+ close(fd);
+}
+
+int main(int argc, char **argv)
+{
+ int i;
+
+ if (argc > 1) {
+ for (i = 1; i < argc; i++) {
+ int object_size = atoi(argv[i]);
+ if (object_size)
+ run((object_size + PITCH - 1) & -PITCH);
+ }
+ } else
+ run(OBJECT_SIZE);
+
+ return 0;
+}
--
1.7.10
