diff options
author | Chris Wilson <chris@chris-wilson.co.uk> | 2015-01-02 16:33:31 +0530 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-01-06 09:29:45 +0100 |
commit | 58865891ba31914eb35f56a553ff7056e3443b06 (patch) | |
tree | 1b977b81fc19cf0f33b3476fc188c1e96985f7f6 /tests/gem_gtt_speed.c | |
parent | e70c789909efee8da5c483dc84361418c1d43018 (diff) |
igt/gem_gtt_speed: compare against WC mmaps
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'tests/gem_gtt_speed.c')
-rw-r--r-- | tests/gem_gtt_speed.c | 63 |
1 files changed, 62 insertions, 1 deletions
diff --git a/tests/gem_gtt_speed.c b/tests/gem_gtt_speed.c index c68b8e4a..d5e745ed 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); |