Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
tests/gem_gtt_speed.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 62 insertions(+), 1 deletion(-)
diff --git a/tests/gem_gtt_speed.c b/tests/gem_gtt_speed.c
index c68b8e4..d5e745e 100644
--- a/tests/gem_gtt_speed.c
+++ b/tests/gem_gtt_speed.c
@@ -206,6 +206,27 @@ int main(int argc, char **argv)
igt_info("Time to read %dk through a GTT map: %7.3fµs\n",
size/1024, elapsed(&start, &end, loop));
+ if (gem_mmap__has_wc(fd)) {
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++) {
+ uint32_t *base = gem_mmap__wc(fd, handle, 0, size, PROT_READ | PROT_WRITE);
+ volatile uint32_t *ptr = base;
+ int x = 0;
+
+ for (i = 0; i < size/sizeof(*ptr); i++)
+ x += ptr[i];
+
+ /* force overtly clever gcc to actually compute x */
+ ptr[0] = x;
+
+ munmap(base, size);
+ }
+ gettimeofday(&end, NULL);
+ igt_info("Time to read %dk through a WC map: %7.3fµs\n",
+ size/1024, elapsed(&start, &end, loop));
+ }
+
+
/* mmap write */
gettimeofday(&start, NULL);
for (loop = 0; loop < 1000; loop++) {
@@ -221,6 +242,23 @@ int main(int argc, char **argv)
igt_info("Time to write %dk through a GTT map: %7.3fµs\n",
size/1024, elapsed(&start, &end, loop));
+ if (gem_mmap__has_wc(fd)) {
+ /* mmap write */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++) {
+ uint32_t *base = gem_mmap__wc(fd, handle, 0, size, PROT_READ | PROT_WRITE);
+ volatile uint32_t *ptr = base;
+
+ for (i = 0; i < size/sizeof(*ptr); i++)
+ ptr[i] = i;
+
+ munmap(base, size);
+ }
+ gettimeofday(&end, NULL);
+ igt_info("Time to write %dk through a WC map: %7.3fµs\n",
+ size/1024, elapsed(&start, &end, loop));
+ }
+
/* mmap clear */
gettimeofday(&start, NULL);
for (loop = 0; loop < 1000; loop++) {
@@ -232,6 +270,19 @@ int main(int argc, char **argv)
igt_info("Time to clear %dk through a GTT map: %7.3fµs\n",
size/1024, elapsed(&start, &end, loop));
+ if (gem_mmap__has_wc(fd)) {
+ /* mmap clear */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++) {
+ uint32_t *base = gem_mmap__wc(fd, handle, 0, size, PROT_READ | PROT_WRITE);
+ memset(base, 0, size);
+ munmap(base, size);
+ }
+ gettimeofday(&end, NULL);
+ igt_info("Time to clear %dk through a WC map: %7.3fµs\n",
+ size/1024, elapsed(&start, &end, loop));
+ }
+
gettimeofday(&start, NULL);{
uint32_t *base = gem_mmap(fd, handle, size, PROT_READ | PROT_WRITE);
for (loop = 0; loop < 1000; loop++)
@@ -241,6 +292,17 @@ int main(int argc, char **argv)
igt_info("Time to clear %dk through a cached GTT map: %7.3fµs\n",
size/1024, elapsed(&start, &end, loop));
+ if (gem_mmap__has_wc(fd)) {
+ gettimeofday(&start, NULL);{
+ uint32_t *base = gem_mmap__wc(fd, handle, 0, size, PROT_READ | PROT_WRITE);
+ for (loop = 0; loop < 1000; loop++)
+ memset(base, 0, size);
+ munmap(base, size);
+ } gettimeofday(&end, NULL);
+ igt_info("Time to clear %dk through a cached WC map: %7.3fµs\n",
+ size/1024, elapsed(&start, &end, loop));
+ }
+
/* mmap read */
gettimeofday(&start, NULL);
for (loop = 0; loop < 1000; loop++) {
@@ -323,7 +385,6 @@ int main(int argc, char **argv)
size *= 4;
}
-
}
gem_close(fd, handle);
--
1.9.1
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