From e984d4965fa98b3071893143c65e6232ff4053ec Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Wed, 22 Jul 2015 15:01:47 +0100 Subject: benchmarks: Benchmarkify gem_exec_ctx Measure the overhead of execution when doing nothing, switching between a pair of contexts, or creating a new context every time. Signed-off-by: Chris Wilson --- benchmarks/gem_exec_ctx.c | 202 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 202 insertions(+) create mode 100644 benchmarks/gem_exec_ctx.c (limited to 'benchmarks/gem_exec_ctx.c') diff --git a/benchmarks/gem_exec_ctx.c b/benchmarks/gem_exec_ctx.c new file mode 100644 index 00000000..dbf7c3af --- /dev/null +++ b/benchmarks/gem_exec_ctx.c @@ -0,0 +1,202 @@ +/* + * 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 + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "drm.h" +#include "ioctl_wrappers.h" +#include "drmtest.h" +#include "intel_io.h" +#include "igt_stats.h" + +enum mode { NOP, CREATE, SWITCH, }; + +#define LOCAL_I915_EXEC_NO_RELOC (1<<11) +#define LOCAL_I915_EXEC_HANDLE_LUT (1<<12) + +static uint64_t elapsed(const struct timespec *start, + const struct timespec *end, + int loop) +{ + return (1000000000ULL*(end->tv_sec - start->tv_sec) + (end->tv_nsec - start->tv_nsec))/loop; +} + +static int __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *execbuf) +{ + int err = 0; + if (drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, execbuf)) + err = -errno; + return err; +} + +static uint32_t batch(int fd) +{ + const uint32_t buf[] = {MI_BATCH_BUFFER_END}; + uint32_t handle = gem_create(fd, 4096); + gem_write(fd, handle, 0, buf, sizeof(buf)); + return handle; +} + +static uint32_t __gem_context_create(int fd) +{ + struct drm_i915_gem_context_create create; + + memset(&create, 0, sizeof(create)); + drmIoctl(fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create); + + return create.ctx_id; +} + +static int loop(unsigned ring, int reps, enum mode mode) +{ + struct drm_i915_gem_execbuffer2 execbuf; + struct drm_i915_gem_exec_object2 gem_exec; + int count, fd; + uint32_t ctx; + + fd = drm_open_any(); + + memset(&gem_exec, 0, sizeof(gem_exec)); + gem_exec.handle = batch(fd); + + memset(&execbuf, 0, sizeof(execbuf)); + execbuf.buffers_ptr = (uintptr_t)&gem_exec; + execbuf.buffer_count = 1; + execbuf.flags = ring; + execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT; + execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC; + execbuf.rsvd1 = __gem_context_create(fd); + if (execbuf.rsvd1 == 0) + return 77; + + if (__gem_execbuf(fd, &execbuf)) { + execbuf.flags = ring; + if (__gem_execbuf(fd, &execbuf)) + return 77; + } + + ctx = gem_context_create(fd); + + for (count = 1; count <= 1<<16; count <<= 1) { + igt_stats_t stats; + int n; + + igt_stats_init_with_size(&stats, reps); + + for (n = 0; n < reps; n++) { + struct timespec start, end; + int loops = count; + sleep(1); /* wait for the hw to go back to sleep */ + clock_gettime(CLOCK_MONOTONIC, &start); + while (loops--) { + uint32_t tmp; + switch (mode) { + case CREATE: + ctx = execbuf.rsvd1; + execbuf.rsvd1 = gem_context_create(fd); + break; + + case SWITCH: + tmp = execbuf.rsvd1; + execbuf.rsvd1 = ctx; + ctx = tmp; + break; + case NOP: + break; + } + do_ioctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf); + if (mode == CREATE) + gem_context_destroy(fd, ctx); + } + gem_sync(fd, gem_exec.handle); + clock_gettime(CLOCK_MONOTONIC, &end); + igt_stats_push(&stats, elapsed(&start, &end, count)); + } + + printf("%7.3f\n", igt_stats_get_trimean(&stats)/1000); + igt_stats_fini(&stats); + } + return 0; +} + +int main(int argc, char **argv) +{ + unsigned ring = I915_EXEC_RENDER; + enum mode mode = NOP; + int reps = 13; + int c; + + while ((c = getopt (argc, argv, "e:r:b:")) != -1) { + switch (c) { + case 'e': + if (strcmp(optarg, "rcs") == 0) + ring = I915_EXEC_RENDER; + else if (strcmp(optarg, "vcs") == 0) + ring = I915_EXEC_BSD; + else if (strcmp(optarg, "bcs") == 0) + ring = I915_EXEC_BLT; + else if (strcmp(optarg, "vecs") == 0) + ring = I915_EXEC_VEBOX; + else + ring = atoi(optarg); + break; + + case 'b': + if (strcmp(optarg, "create") == 0) + mode = CREATE; + else if (strcmp(optarg, "switch") == 0) + mode = SWITCH; + else if (strcmp(optarg, "nop") == 0) + mode = NOP; + else + abort(); + break; + + case 'r': + reps = atoi(optarg); + if (reps < 1) + reps = 1; + break; + + default: + break; + } + } + + return loop(ring, reps, mode); +} -- cgit v1.2.3