| /* |
| * Copyright © 2012 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> |
| * |
| */ |
| |
| /* Exercises the basic execbuffer using theh andle LUT interface */ |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <inttypes.h> |
| #include <errno.h> |
| #include <sys/stat.h> |
| #include <sys/time.h> |
| #include "drm.h" |
| #include "ioctl_wrappers.h" |
| #include "drmtest.h" |
| |
| #define BATCH_SIZE (1024*1024) |
| |
| #define LOCAL_I915_EXEC_NO_RELOC (1<<11) |
| #define LOCAL_I915_EXEC_HANDLE_LUT (1<<12) |
| |
| #define MAX_NUM_EXEC 2048 |
| #define MAX_NUM_RELOC 4096 |
| |
| #define USE_LUT 0x1 |
| #define SKIP_RELOC 0x2 |
| #define NO_RELOC 0x4 |
| |
| struct drm_i915_gem_exec_object2 gem_exec[MAX_NUM_EXEC+1]; |
| struct drm_i915_gem_relocation_entry gem_reloc[MAX_NUM_RELOC]; |
| |
| static uint32_t state = 0x12345678; |
| |
| static uint32_t |
| hars_petruska_f54_1_random (void) |
| { |
| #define rol(x,k) ((x << k) | (x >> (32-k))) |
| return state = (state ^ rol (state, 5) ^ rol (state, 24)) + 0x37798849; |
| #undef rol |
| } |
| |
| |
| static int exec(int fd, int num_exec, int num_relocs, unsigned flags) |
| { |
| struct drm_i915_gem_execbuffer2 execbuf; |
| struct drm_i915_gem_exec_object2 *objects; |
| int i; |
| |
| gem_exec[MAX_NUM_EXEC].relocation_count = num_relocs; |
| gem_exec[MAX_NUM_EXEC].relocs_ptr = (uintptr_t) gem_reloc; |
| |
| objects = gem_exec + MAX_NUM_EXEC - num_exec; |
| |
| for (i = 0; i < num_relocs; i++) { |
| int target = hars_petruska_f54_1_random() % num_exec; |
| gem_reloc[i].offset = 1024; |
| gem_reloc[i].delta = 0; |
| gem_reloc[i].target_handle = |
| flags & USE_LUT ? target : objects[target].handle; |
| gem_reloc[i].read_domains = I915_GEM_DOMAIN_RENDER; |
| gem_reloc[i].write_domain = 0; |
| gem_reloc[i].presumed_offset = 0; |
| if (flags & SKIP_RELOC) |
| gem_reloc[i].presumed_offset = objects[target].offset; |
| } |
| |
| execbuf.buffers_ptr = (uintptr_t)objects; |
| execbuf.buffer_count = num_exec + 1; |
| execbuf.batch_start_offset = 0; |
| execbuf.batch_len = 8; |
| execbuf.cliprects_ptr = 0; |
| execbuf.num_cliprects = 0; |
| execbuf.DR1 = 0; |
| execbuf.DR4 = 0; |
| execbuf.flags = 0; |
| if (flags & USE_LUT) |
| execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT; |
| if (flags & NO_RELOC) |
| execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC; |
| i915_execbuffer2_set_context_id(execbuf, 0); |
| execbuf.rsvd2 = 0; |
| |
| return drmIoctl(fd, |
| DRM_IOCTL_I915_GEM_EXECBUFFER2, |
| &execbuf); |
| } |
| |
| #define ELAPSED(a,b) (1e6*((b)->tv_sec - (a)->tv_sec) + ((b)->tv_usec - (a)->tv_usec)) |
| igt_simple_main |
| { |
| uint32_t batch[2] = {MI_BATCH_BUFFER_END}; |
| int fd, n, m, count; |
| const struct { |
| const char *name; |
| unsigned int flags; |
| } pass[] = { |
| { .name = "relocation", .flags = 0 }, |
| { .name = "skip-relocs", .flags = SKIP_RELOC }, |
| { .name = "no-relocs", .flags = NO_RELOC }, |
| { .name = NULL }, |
| }, *p; |
| |
| igt_skip_on_simulation(); |
| |
| fd = drm_open_any(); |
| |
| for (n = 0; n < MAX_NUM_EXEC; n++) { |
| gem_exec[n].handle = gem_create(fd, 4096); |
| gem_exec[n].relocation_count = 0; |
| gem_exec[n].relocs_ptr = 0; |
| gem_exec[n].alignment = 0; |
| gem_exec[n].offset = 0; |
| gem_exec[n].flags = 0; |
| gem_exec[n].rsvd1 = 0; |
| gem_exec[n].rsvd2 = 0; |
| } |
| |
| gem_exec[n].handle = gem_create(fd, 4096); |
| gem_write(fd, gem_exec[n].handle, 0, batch, sizeof(batch)); |
| |
| igt_skip_on(exec(fd, 1, 0, USE_LUT)); |
| |
| for (p = pass; p->name != NULL; p++) { |
| for (n = 1; n <= MAX_NUM_EXEC; n *= 2) { |
| double elapsed[16][2]; |
| double s_x, s_y, s_xx, s_xy; |
| double A, B; |
| int i, j; |
| |
| for (i = 0, m = 1; m <= MAX_NUM_RELOC; m *= 2, i++) { |
| struct timeval start, end; |
| |
| do_or_die(exec(fd, n, m, 0 | p->flags)); |
| gettimeofday(&start, NULL); |
| for (count = 0; count < 1000; count++) |
| do_or_die(exec(fd, n, m, 0 | p->flags)); |
| gettimeofday(&end, NULL); |
| gem_sync(fd, gem_exec[MAX_NUM_EXEC].handle); |
| elapsed[i][0] = ELAPSED(&start, &end); |
| |
| do_or_die(exec(fd, n, m, USE_LUT | p->flags)); |
| gettimeofday(&start, NULL); |
| for (count = 0; count < 1000; count++) |
| do_or_die(exec(fd, n, m, USE_LUT | p->flags)); |
| gettimeofday(&end, NULL); |
| gem_sync(fd, gem_exec[MAX_NUM_EXEC].handle); |
| elapsed[i][1] = ELAPSED(&start, &end); |
| } |
| |
| igt_info("%s: buffers=%4d:", p->name, n); |
| |
| s_x = s_y = s_xx = s_xy = 0; |
| for (j = 0; j < i; j++) { |
| int k = 1 << j; |
| s_x += k; |
| s_y += elapsed[j][0]; |
| s_xx += k * k; |
| s_xy += k * elapsed[j][0]; |
| } |
| B = (s_xy - s_x * s_y / j) / (s_xx - s_x * s_x / j); |
| A = s_y / j - B * s_x / j; |
| igt_info(" old=%7.0f + %.1f*reloc,", A, B); |
| |
| s_x = s_y = s_xx = s_xy = 0; |
| for (j = 0; j < i; j++) { |
| int k = 1 << j; |
| s_x += k; |
| s_y += elapsed[j][1]; |
| s_xx += k * k; |
| s_xy += k * elapsed[j][1]; |
| } |
| B = (s_xy - s_x * s_y / j) / (s_xx - s_x * s_x / j); |
| A = s_y / j - B * s_x / j; |
| igt_info(" lut=%7.0f + %.1f*reloc (ns)", A, B); |
| |
| igt_info("\n"); |
| } |
| } |
| } |