benchmarks: Add vgem mmap speed test
Primarily to check that we have the WC read/write disparity.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/benchmarks/.gitignore b/benchmarks/.gitignore
index 25d2f3c..5ce2874 100644
--- a/benchmarks/.gitignore
+++ b/benchmarks/.gitignore
@@ -15,4 +15,5 @@
intel_upload_blit_large_map
intel_upload_blit_small
kms_vblank
+vgem_mmap
# Please keep sorted alphabetically
diff --git a/benchmarks/Makefile.sources b/benchmarks/Makefile.sources
index bc4f2b5..6865e73 100644
--- a/benchmarks/Makefile.sources
+++ b/benchmarks/Makefile.sources
@@ -19,4 +19,5 @@
gem_syslatency \
gem_userptr_benchmark \
kms_vblank \
+ vgem_mmap \
$(NULL)
diff --git a/benchmarks/ezbench.d/vgem_mmap.test b/benchmarks/ezbench.d/vgem_mmap.test
new file mode 100644
index 0000000..0e71ecd
--- /dev/null
+++ b/benchmarks/ezbench.d/vgem_mmap.test
@@ -0,0 +1,10 @@
+[ -e $IGT_BENCHMARKS/vgem_mmap ] || return 1
+sudo -n true || return 1
+
+for i in fault clear write read; do
+ name="vgem:mmap::$i"
+ test_name="$test_name $name"
+ eval "${name}_run() { sudo $IGT_BENCHMARKS/vgem_mmap -d $i -r \$1 ; } "
+done
+
+test_exec_time=2
diff --git a/benchmarks/vgem_mmap.c b/benchmarks/vgem_mmap.c
new file mode 100644
index 0000000..7e4e459
--- /dev/null
+++ b/benchmarks/vgem_mmap.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright ©2016 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 <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 "igt.h"
+#include "igt_vgem.h"
+
+static double elapsed(const struct timespec *start,
+ const struct timespec *end)
+{
+ return (end->tv_sec - start->tv_sec) + 1e-9*(end->tv_nsec - start->tv_nsec);
+}
+
+int main(int argc, char **argv)
+{
+ enum dir {READ, WRITE, CLEAR, FAULT} dir = READ;
+ struct timespec start, end;
+ struct vgem_bo bo;
+ void *buf;
+ void *ptr, *src, *dst;
+ int reps = 1;
+ int loops;
+ int vgem;
+ int c;
+
+ while ((c = getopt (argc, argv, "d:r:")) != -1) {
+ switch (c) {
+ case 'd':
+ if (strcmp(optarg, "read") == 0)
+ dir = READ;
+ else if (strcmp(optarg, "write") == 0)
+ dir = WRITE;
+ else if (strcmp(optarg, "clear") == 0)
+ dir = CLEAR;
+ else if (strcmp(optarg, "fault") == 0)
+ dir = FAULT;
+ else
+ abort();
+ break;
+
+ case 'r':
+ reps = atoi(optarg);
+ if (reps < 1)
+ reps = 1;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ vgem = drm_open_driver(DRIVER_VGEM);
+
+ bo.width = 2024;
+ bo.height = 2024;
+ bo.bpp = 4;
+ vgem_create(vgem, &bo);
+ ptr = vgem_mmap(vgem, &bo, PROT_WRITE);
+ buf = malloc(bo.size);
+
+ if (dir == READ) {
+ src = ptr;
+ dst = buf;
+ } else {
+ src = buf;
+ dst = ptr;
+ }
+
+ clock_gettime(CLOCK_MONOTONIC, &start);
+ switch (dir) {
+ case CLEAR:
+ case FAULT:
+ memset(dst, 0, bo.size);
+ break;
+ default:
+ memcpy(dst, src, bo.size);
+ break;
+ }
+ clock_gettime(CLOCK_MONOTONIC, &end);
+
+ loops = 2 / elapsed(&start, &end);
+ while (reps--) {
+ clock_gettime(CLOCK_MONOTONIC, &start);
+ for (c = 0; c < loops; c++) {
+ int page;
+
+ switch (dir) {
+ case CLEAR:
+ memset(dst, 0, bo.size);
+ break;
+ case FAULT:
+ munmap(ptr, bo.size);
+ ptr = vgem_mmap(vgem, &bo, PROT_WRITE);
+ for (page = 0; page < bo.size; page += 4096) {
+ uint32_t *x = (uint32_t *)ptr + page/4;
+ __asm__ __volatile__("": : :"memory");
+ page += *x; /* should be zero! */
+ }
+ break;
+ default:
+ memcpy(dst, src, bo.size);
+ break;
+ }
+ }
+ clock_gettime(CLOCK_MONOTONIC, &end);
+ printf("%7.3f\n", bo.size / elapsed(&start, &end) * loops / (1024*1024));
+ }
+
+ return 0;
+}
diff --git a/tests/prime_vgem.c b/tests/prime_vgem.c
index d45cba8..2753fce 100644
--- a/tests/prime_vgem.c
+++ b/tests/prime_vgem.c
@@ -48,15 +48,14 @@
for (i = 0; i < 1024; i++)
ptr[1024*i] = i;
munmap(ptr, scratch.size);
+ gem_close(vgem, scratch.handle);
for (i = 0; i < 1024; i++) {
uint32_t tmp;
gem_read(i915, handle, 4096*i, &tmp, sizeof(tmp));
igt_assert_eq(tmp, i);
}
-
gem_close(i915, handle);
- gem_close(vgem, scratch.handle);
}
static void test_write(int vgem, int i915)
@@ -75,16 +74,16 @@
handle = prime_fd_to_handle(i915, dmabuf);
close(dmabuf);
+ ptr = vgem_mmap(vgem, &scratch, PROT_READ);
+ gem_close(vgem, scratch.handle);
+
for (i = 0; i < 1024; i++)
gem_write(i915, handle, 4096*i, &i, sizeof(i));
+ gem_close(i915, handle);
- ptr = vgem_mmap(vgem, &scratch, PROT_READ);
for (i = 0; i < 1024; i++)
igt_assert_eq(ptr[1024*i], i);
munmap(ptr, scratch.size);
-
- gem_close(i915, handle);
- gem_close(vgem, scratch.handle);
}
static void test_gtt(int vgem, int i915)