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Diffstat (limited to 'tests/i915/gem_pread.c')
-rw-r--r-- | tests/i915/gem_pread.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/tests/i915/gem_pread.c b/tests/i915/gem_pread.c new file mode 100644 index 00000000..00379580 --- /dev/null +++ b/tests/i915/gem_pread.c @@ -0,0 +1,248 @@ +/* + * 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 "igt.h" +#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 "drm.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) +{ + while (loops--) + gem_read(fd, handle, 0, buf, len); +} + +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; +} + + +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; + double usecs; + char buf[100]; + const char* bps; + const struct { + int level; + const char *name; + } cache[] = { + { 0, "uncached" }, + { 1, "snoop" }, + { 2, "display" }, + { -1 }, + }, *c; + + igt_subtest_init(argc, argv); + + if (argc > 1 && atoi(argv[1])) + object_size = atoi(argv[1]); + if (object_size == 0) + object_size = OBJECT_SIZE; + object_size = (object_size + 3) & -4; + + igt_fixture { + fd = drm_open_driver(DRIVER_INTEL); + + 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("basic") { + for (count = 1; count <= 1<<17; count <<= 1) { + struct timeval start, end; + + gettimeofday(&start, NULL); + do_gem_read(fd, dst, src, object_size, count); + gettimeofday(&end, NULL); + usecs = elapsed(&start, &end, count); + bps = bytes_per_sec(buf, object_size/usecs*1e6); + igt_info("Time to pread %d bytes x %6d: %7.3fµs, %s\n", + object_size, count, usecs, bps); + fflush(stdout); + } + } + + for (c = cache; c->level != -1; c++) { + igt_subtest(c->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_read(fd, dst, src, object_size, count); + gettimeofday(&end, NULL); + usecs = elapsed(&start, &end, count); + bps = bytes_per_sec(buf, object_size/usecs*1e6); + igt_info("Time to %s pread %d bytes x %6d: %7.3fµs, %s\n", + c->name, object_size, count, usecs, bps); + fflush(stdout); + } + } + } + + igt_subtest("stolen-normal") { + gem_require_stolen_support(fd); + 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); + usecs = elapsed(&start, &end, count); + bps = bytes_per_sec(buf, object_size/usecs*1e6); + igt_info("Time to pread %d bytes x %6d: %7.3fµs, %s\n", + object_size, count, usecs, bps); + fflush(stdout); + } + } + for (c = cache; c->level != -1; c++) { + igt_subtest_f("stolen-%s", c->name) { + gem_require_stolen_support(fd); + 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); + usecs = elapsed(&start, &end, count); + bps = bytes_per_sec(buf, object_size/usecs*1e6); + igt_info("Time to stolen-%s pread %d bytes x %6d: %7.3fµs, %s\n", + c->name, object_size, count, usecs, bps); + fflush(stdout); + } + } + } + + /* List the time taken in pread operation for stolen objects, with + * and without the overhead of page fault handling on accessing the + * user space buffer + */ + igt_subtest("pagefault-pread") { + gem_require_stolen_support(fd); + large_stolen = gem_create_stolen(fd, LARGE_OBJECT_SIZE); + stolen_nopf_user = (uint32_t *) mmap(NULL, LARGE_OBJECT_SIZE, + PROT_WRITE, + MAP_ANONYMOUS|MAP_PRIVATE, + -1, 0); + igt_assert(stolen_nopf_user); + + for (count = 1; count <= 10; count ++) { + struct timeval start, end; + double t_elapsed = 0; + + gettimeofday(&start, NULL); + do_gem_read(fd, large_stolen, stolen_nopf_user, + LARGE_OBJECT_SIZE, 1); + gettimeofday(&end, NULL); + t_elapsed = elapsed(&start, &end, count); + bps = bytes_per_sec(buf, object_size/t_elapsed*1e6); + igt_info("Pagefault-N - Time to pread %d bytes: %7.3fµs, %s\n", + LARGE_OBJECT_SIZE, t_elapsed, bps); + + stolen_pf_user = (uint32_t *) mmap(NULL, LARGE_OBJECT_SIZE, + PROT_WRITE, + MAP_ANONYMOUS|MAP_PRIVATE, + -1, 0); + igt_assert(stolen_pf_user); + + gettimeofday(&start, NULL); + do_gem_read(fd, large_stolen, stolen_pf_user, + LARGE_OBJECT_SIZE, 1); + gettimeofday(&end, NULL); + usecs = elapsed(&start, &end, count); + bps = bytes_per_sec(buf, object_size/usecs*1e6); + igt_info("Pagefault-Y - Time to pread %d bytes: %7.3fµs, %s%s%s\n", + LARGE_OBJECT_SIZE, usecs, + t_elapsed < usecs ? KGRN : KRED, bps, KNRM); + fflush(stdout); + munmap(stolen_pf_user, LARGE_OBJECT_SIZE); + } + munmap(stolen_nopf_user, LARGE_OBJECT_SIZE); + gem_close(fd, large_stolen); + } + + + igt_fixture { + free(src); + gem_close(fd, dst); + free(dst_user); + gem_close(fd, src_stolen); + + close(fd); + } + + igt_exit(); +} |