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/*
* 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 "i915_drm.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))
int main(int argc, char **argv)
{
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));
if (exec(fd, 1, 0, USE_LUT))
return 77;
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;
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);
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);
}
printf("%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;
printf(" 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;
printf(" lut=%7.0f + %.1f*reloc (ns)", A, B);
printf("\n");
}
}
return 0;
}
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