gem_pwrite_pread: Measure how long it takes to upload/copy/download

Further trying to determine the effects of setting snooping.

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 845eb6c..cc9f780 100644 (file)
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -73,6 +73,7 @@ TESTS_progs = \
        gem_pipe_control_store_loop \
        gem_pread \
        gem_pwrite \
+       gem_pwrite_pread \
        gem_readwrite \
        gem_reg_read \
        gem_reloc_overflow \

diff --git a/tests/gem_pwrite_pread.c b/tests/gem_pwrite_pread.c
new file mode 100644 (file)
index 0000000..b400e1f
--- /dev/null
+++ b/tests/gem_pwrite_pread.c
@@ -0,0 +1,230 @@
+/*
+ * 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 <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_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_gpu_tools.h"
+
+#define OBJECT_SIZE 16384
+
+#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 void copy(int fd, uint32_t src, uint32_t dst, void *buf, int len, int loops)
+{
+       struct drm_i915_gem_relocation_entry reloc[] = {
+               { dst, 0, 4*sizeof(uint32_t), 0, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER },
+               { src, 0, 7*sizeof(uint32_t), 0, I915_GEM_DOMAIN_RENDER, 0 },
+       };
+       struct drm_i915_gem_exec_object2 exec[] = {
+               { src },
+               { dst },
+               { gem_create(fd, 4096), 2, (uintptr_t)reloc }
+       };
+       uint32_t batch[] = {
+               COPY_BLT_CMD | BLT_WRITE_ALPHA | BLT_WRITE_RGB,
+               0xcc << 16 | 1 << 25 | 1 << 24 | len,
+               0,
+               1 << 16 | (len / 4),
+               0, /* dst */
+               0,
+               len,
+               0, /* src */
+               MI_BATCH_BUFFER_END,
+               0
+       };
+       struct drm_i915_gem_execbuffer2 execbuf = {
+               (uintptr_t)exec, 3,
+               0, sizeof(batch),
+               0, 0, 0, 0,
+               HAS_BLT_RING(intel_get_drm_devid(fd)) ? I915_EXEC_BLT : 0,
+       };
+       gem_write(fd, exec[2].handle, 0, batch, sizeof(batch));
+
+       while (loops--) {
+               gem_write(fd, src, 0, buf, len);
+               do_or_die(drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf));
+               gem_read(fd, dst, 0, buf, len);
+       }
+
+       gem_close(fd, exec[2].handle);
+}
+
+static void test(int fd, uint32_t src, uint32_t dst, uint32_t *buf, int len)
+{
+       struct drm_i915_gem_relocation_entry reloc[] = {
+               { dst, 0, 4*sizeof(uint32_t), 0, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER },
+               { src, 0, 7*sizeof(uint32_t), 0, I915_GEM_DOMAIN_RENDER, 0 },
+       };
+       struct drm_i915_gem_exec_object2 exec[] = {
+               { src },
+               { dst },
+               { gem_create(fd, 4096), 2, (uintptr_t)reloc }
+       };
+       uint32_t batch[] = {
+               COPY_BLT_CMD | BLT_WRITE_ALPHA | BLT_WRITE_RGB,
+               0xcc << 16 | 1 << 25 | 1 << 24 | len,
+               0,
+               1 << 16 | (len / 4),
+               0, /* dst */
+               0,
+               len,
+               0, /* src */
+               MI_BATCH_BUFFER_END,
+               0
+       };
+       struct drm_i915_gem_execbuffer2 execbuf = {
+               (uintptr_t)exec, 3,
+               0, sizeof(batch),
+               0, 0, 0, 0,
+               HAS_BLT_RING(intel_get_drm_devid(fd)) ? I915_EXEC_BLT : 0,
+       };
+       int i;
+
+       gem_write(fd, exec[2].handle, 0, batch, sizeof(batch));
+
+       for (i = 0; i < len/4; i++)
+               buf[i] = i;
+
+       gem_write(fd, src, 0, buf, len);
+       memset(buf, 0, len);
+
+       do_or_die(drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf));
+       gem_read(fd, dst, 0, buf, len);
+
+       gem_close(fd, exec[2].handle);
+
+       for (i = 0; i < len/4; i++)
+               assert(buf[i] == i);
+}
+
+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",
+               NULL,
+       }, **o = order;
+
+       while (v > 1000 && o[1]) {
+               v /= 1000;
+               o++;
+       }
+       sprintf(buf, "%.1f%s/s", v, *o);
+       return buf;
+}
+
+int main(int argc, char **argv)
+{
+       int object_size = 0;
+       uint32_t buf[20];
+       uint32_t *tmp, src, dst;
+       int fd, count;
+
+       drmtest_skip_on_simulation();
+
+       if (argc > 1)
+               object_size = atoi(argv[1]);
+       if (object_size == 0)
+               object_size = OBJECT_SIZE;
+       object_size = (object_size + 3) & -4;
+
+       fd = drm_open_any();
+
+       dst = gem_create(fd, object_size);
+       src = gem_create(fd, object_size);
+       tmp = malloc(object_size);
+
+       gem_set_cacheing(fd, src, 0);
+       gem_set_cacheing(fd, dst, 0);
+       test(fd, src, dst, tmp, object_size);
+       for (count = 1; count <= 1<<17; count <<= 1) {
+               struct timeval start, end;
+
+               gettimeofday(&start, NULL);
+               copy(fd, src, dst, tmp, object_size, count);
+               gettimeofday(&end, NULL);
+               printf("Time to uncached copy %d bytes x %6d:   %7.3fµs, %s\n",
+                      object_size, count,
+                      elapsed(&start, &end, count),
+                      bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
+               fflush(stdout);
+       }
+
+       gem_set_cacheing(fd, src, 1);
+       gem_set_cacheing(fd, dst, 1);
+       test(fd, src, dst, tmp, object_size);
+       for (count = 1; count <= 1<<17; count <<= 1) {
+               struct timeval start, end;
+
+               gettimeofday(&start, NULL);
+               copy(fd, src, dst, tmp, object_size, count);
+               gettimeofday(&end, NULL);
+               printf("Time to snooped copy %d bytes x %6d:    %7.3fµs, %s\n",
+                      object_size, count,
+                      elapsed(&start, &end, count),
+                      bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
+               fflush(stdout);
+       }
+
+       free(tmp);
+       gem_close(fd, src);
+       gem_close(fd, dst);
+
+       close(fd);
+
+       return 0;
+}