From: Ankitprasad Sharma <ankitprasad.r.sharma@xxxxxxxxx>
This patch adds support to verify pread/pwrite for non-shmem backed
objects. It also shows the pread/pwrite speed.
It also tests speeds for pread with and without user side page faults
v2: Rebased to the latest (Ankit)
Signed-off-by: Ankitprasad Sharma <ankitprasad.r.sharma at intel.com>
---
tests/gem_pread.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/gem_pwrite.c | 45 ++++++++++++++++++++++++
2 files changed, 145 insertions(+)
diff --git a/tests/gem_pread.c b/tests/gem_pread.c
index cc83948..95162d5 100644
--- a/tests/gem_pread.c
+++ b/tests/gem_pread.c
@@ -41,6 +41,10 @@
#include "drmtest.h"
#define OBJECT_SIZE 16384
+#define LARGE_OBJECT_SIZE 1024 * 1024
+#define KGRN "\x1B[32m"
+#define KRED "\x1B[31m"
+#define KNRM "\x1B[0m"
static void do_gem_read(int fd, uint32_t handle, void *buf, int len, int loops)
{
@@ -76,11 +80,14 @@ static const char *bytes_per_sec(char *buf, double v)
uint32_t *src, dst;
+uint32_t *dst_user, src_stolen, large_stolen;
+uint32_t *stolen_pf_user, *stolen_nopf_user;
int fd, count;
int main(int argc, char **argv)
{
int object_size = 0;
+ int large_obj_size = LARGE_OBJECT_SIZE;
uint32_t buf[20];
const struct {
int level;
@@ -90,6 +97,9 @@ int main(int argc, char **argv)
{ 1, "snoop" },
{ 2, "display" },
{ -1 },
+ { -1, "stolen-uncached"},
+ { -1, "stolen-snoop"},
+ { -1, "stolen-display"},
}, *c;
igt_subtest_init(argc, argv);
@@ -106,6 +116,8 @@ int main(int argc, char **argv)
dst = gem_create(fd, object_size);
src = malloc(object_size);
+ src_stolen = gem_create_stolen(fd, object_size);
+ dst_user = malloc(object_size);
}
igt_subtest("normal") {
@@ -142,9 +154,97 @@ int main(int argc, char **argv)
}
}
+ igt_subtest("stolen-normal") {
+ for (count = 1; count <= 1<<17; count <<= 1) {
+ struct timeval start, end;
+
+ gettimeofday(&start, NULL);
+ do_gem_read(fd, src_stolen, dst_user, object_size, count);
+ gettimeofday(&end, NULL);
+ igt_info("Time to pread %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);
+ }
+ }
+ for (c = cache; c->level != -1; c++) {
+ igt_subtest((c + 4)->name) {
+ gem_set_caching(fd, src_stolen, c->level);
+
+ for (count = 1; count <= 1<<17; count <<= 1) {
+ struct timeval start, end;
+
+ gettimeofday(&start, NULL);
+ do_gem_read(fd, src_stolen, dst_user,
+ object_size, count);
+ gettimeofday(&end, NULL);
+ igt_info("Time to %s pread %d bytes x %6d: %7.3fµs, %s\n",
+ (c + 4)->name, object_size, count,
+ elapsed(&start, &end, count),
+ bytes_per_sec((char *)buf,
+ object_size/elapsed(&start, &end, count)*1e6));
+ fflush(stdout);
+ }
+ }
+ }
+
+ /* List pread times for stolen area with 1 page fault (page fault only
+ * first time) and multiple page faults (unmapping the pages at the
+ * end of each iteration)
+ */
+ igt_subtest("pagefault-pread") {
+ large_stolen = gem_create_stolen(fd, large_obj_size);
+ stolen_nopf_user = (uint32_t *) mmap(NULL, large_obj_size,
+ PROT_WRITE,
+ MAP_ANONYMOUS|MAP_PRIVATE,
+ -1, 0);
+
+ for (count = 1; count <= 10; count ++) {
+ struct timeval start, end;
+ uint32_t t_elapsed = 0;
+
+ gettimeofday(&start, NULL);
+ do_gem_read(fd, large_stolen, stolen_nopf_user,
+ large_obj_size, 1);
+ gettimeofday(&end, NULL);
+ t_elapsed = elapsed(&start, &end, 1);
+ igt_info("Pagefault-N - Time to pread %d bytes: %7.3fµs, %s\n",
+ large_obj_size,
+ elapsed(&start, &end, 1),
+ bytes_per_sec((char *)buf,
+ large_obj_size/elapsed(&start, &end, 1)*1e6));
+
+ stolen_pf_user = (uint32_t *) mmap(NULL, large_obj_size,
+ PROT_WRITE,
+ MAP_ANONYMOUS|MAP_PRIVATE,
+ -1, 0);
+
+ gettimeofday(&start, NULL);
+ do_gem_read(fd, large_stolen, stolen_pf_user,
+ large_obj_size, 1);
+ gettimeofday(&end, NULL);
+ igt_info("Pagefault-Y - Time to pread %d bytes: %7.3fµs, %s%s%s\n",
+ large_obj_size,
+ elapsed(&start, &end, 1),
+ t_elapsed < elapsed(&start, &end, 1) ? KGRN : KRED,
+ bytes_per_sec((char *)buf,
+ large_obj_size/elapsed(&start, &end, 1)*1e6),
+ KNRM);
+ fflush(stdout);
+ munmap(stolen_pf_user, large_obj_size);
+ }
+ munmap(stolen_nopf_user, large_obj_size);
+ gem_close(fd, large_stolen);
+ }
+
+
igt_fixture {
free(src);
gem_close(fd, dst);
+ free(dst_user);
+ gem_close(fd, src_stolen);
close(fd);
}
diff --git a/tests/gem_pwrite.c b/tests/gem_pwrite.c
index 5b6a77f..c7e3edf 100644
--- a/tests/gem_pwrite.c
+++ b/tests/gem_pwrite.c
@@ -135,6 +135,7 @@ static void test_big_gtt(int fd, int scale)
}
uint32_t *src, dst;
+uint32_t *src_user, dst_stolen;
int fd;
int main(int argc, char **argv)
@@ -150,6 +151,9 @@ int main(int argc, char **argv)
{ 1, "snoop" },
{ 2, "display" },
{ -1 },
+ { -1, "stolen-uncached"},
+ { -1, "stolen-snoop"},
+ { -1, "stolen-display"},
}, *c;
igt_skip_on_simulation();
@@ -167,6 +171,8 @@ int main(int argc, char **argv)
dst = gem_create(fd, object_size);
src = malloc(object_size);
+ dst_stolen = gem_create_stolen(fd, object_size);
+ src_user = malloc(object_size);
}
igt_subtest("normal") {
@@ -203,9 +209,48 @@ int main(int argc, char **argv)
}
}
+ igt_subtest("stolen-normal") {
+ for (count = 1; count <= 1<<17; count <<= 1) {
+ struct timeval start, end;
+
+ gettimeofday(&start, NULL);
+ do_gem_write(fd, dst_stolen, src_user,
+ object_size, count);
+ gettimeofday(&end, NULL);
+ igt_info("Time to pwrite %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);
+ }
+ }
+
+ for (c = cache; c->level != -1; c++) {
+ igt_subtest((c + 4)->name) {
+ gem_set_caching(fd, dst, c->level);
+ for (count = 1; count <= 1<<17; count <<= 1) {
+ struct timeval start, end;
+
+ gettimeofday(&start, NULL);
+ do_gem_write(fd, dst_stolen, src_user,
+ object_size, count);
+ gettimeofday(&end, NULL);
+ igt_info("Time to %s pwrite %d bytes x %6d: %7.3fµs, %s\n",
+ (c + 4)->name, object_size, count,
+ elapsed(&start, &end, count),
+ bytes_per_sec((char *)buf,
+ object_size/elapsed(&start, &end, count)*1e6));
+ fflush(stdout);
+ }
+ }
+ }
+
igt_fixture {
free(src);
gem_close(fd, dst);
+ free(src_user);
+ gem_close(fd, dst_stolen);
}
igt_subtest("big-cpu")
--
1.9.1
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