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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 the handle LUT interface */
#include "igt.h"
#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"
IGT_TEST_DESCRIPTION("Exercises the basic execbuffer using the handle LUT"
" interface.");
#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 SKIP_RELOC 0x1
#define NO_RELOC 0x2
#define CYCLE_BATCH 0x4
#define FAULT 0x8
int target[MAX_NUM_RELOC];
struct drm_i915_gem_exec_object2 gem_exec[MAX_NUM_EXEC+1];
struct drm_i915_gem_relocation_entry mem_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 has_exec_lut(int fd)
{
struct drm_i915_gem_execbuffer2 execbuf;
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = to_user_pointer((gem_exec + MAX_NUM_EXEC));
execbuf.buffer_count = 1;
execbuf.flags = LOCAL_I915_EXEC_HANDLE_LUT;
return __gem_execbuf(fd, &execbuf) == 0;
}
#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};
uint32_t cycle[16];
int fd, n, m, count, c;
const struct {
const char *name;
unsigned int flags;
} pass[] = {
{ .name = "relocation", .flags = 0 },
{ .name = "cycle-relocation", .flags = CYCLE_BATCH },
{ .name = "fault-relocation", .flags = FAULT },
{ .name = "skip-relocs", .flags = SKIP_RELOC },
{ .name = "no-relocs", .flags = SKIP_RELOC | NO_RELOC },
{ .name = NULL },
}, *p;
struct drm_i915_gem_relocation_entry *reloc;
uint32_t reloc_handle;
int size;
igt_skip_on_simulation();
fd = drm_open_driver(DRIVER_INTEL);
igt_require_gem(fd);
memset(gem_exec, 0, sizeof(gem_exec));
for (n = 0; n < MAX_NUM_EXEC; n++)
gem_exec[n].handle = gem_create(fd, 4096);
for (n = 0; n < 16; n++) {
cycle[n] = gem_create(fd, 4096);
gem_write(fd, cycle[n], 0, batch, sizeof(batch));
}
gem_exec[MAX_NUM_EXEC].handle = cycle[0];
memset(mem_reloc, 0, sizeof(mem_reloc));
for (n = 0; n < MAX_NUM_RELOC; n++) {
mem_reloc[n].offset = 1024;
mem_reloc[n].read_domains = I915_GEM_DOMAIN_RENDER;
}
size = ALIGN(sizeof(mem_reloc), 4096);
reloc_handle = gem_create(fd, size);
reloc = gem_mmap__cpu(fd, reloc_handle, 0, size, PROT_READ | PROT_WRITE);
for (n = 0; n < MAX_NUM_RELOC; n++) {
reloc[n].offset = 1024;
reloc[n].read_domains = I915_GEM_DOMAIN_RENDER;
}
munmap(reloc, size);
igt_require(has_exec_lut(fd));
for (p = pass; p->name != NULL; p++) {
if (p->flags & FAULT)
igt_disable_prefault();
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 drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 *objects;
struct timeval start, end;
if (p->flags & FAULT)
reloc = __gem_mmap__cpu(fd, reloc_handle, 0, size, PROT_READ | PROT_WRITE);
else
reloc = mem_reloc;
gem_exec[MAX_NUM_EXEC].relocation_count = m;
gem_exec[MAX_NUM_EXEC].relocs_ptr = to_user_pointer(reloc);
objects = gem_exec + MAX_NUM_EXEC - n;
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = to_user_pointer(objects);
execbuf.buffer_count = n + 1;
execbuf.flags = LOCAL_I915_EXEC_HANDLE_LUT;
if (p->flags & NO_RELOC)
execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
for (j = 0; j < m; j++) {
target[j] = hars_petruska_f54_1_random() % n;
reloc[j].target_handle = target[j];
reloc[j].presumed_offset = -1;
}
gem_execbuf(fd,&execbuf);
gettimeofday(&start, NULL);
for (count = 0; count < 1000; count++) {
if ((p->flags & SKIP_RELOC) == 0) {
for (j = 0; j < m; j++)
reloc[j].presumed_offset = -1;
if (p->flags & CYCLE_BATCH) {
c = (c + 1) % 16;
gem_exec[MAX_NUM_EXEC].handle = cycle[c];
}
}
if (p->flags & FAULT) {
munmap(reloc, size);
reloc = __gem_mmap__cpu(fd, reloc_handle, 0, size, PROT_READ | PROT_WRITE);
gem_exec[MAX_NUM_EXEC].relocs_ptr = to_user_pointer(reloc);
}
gem_execbuf(fd, &execbuf);
}
gettimeofday(&end, NULL);
c = 16;
do
gem_sync(fd, cycle[--c]);
while (c != 0);
gem_exec[MAX_NUM_EXEC].handle = cycle[c];
elapsed[i][1] = ELAPSED(&start, &end);
execbuf.flags &= ~LOCAL_I915_EXEC_HANDLE_LUT;
for (j = 0; j < m; j++)
reloc[j].target_handle = objects[target[j]].handle;
gem_execbuf(fd,&execbuf);
gettimeofday(&start, NULL);
for (count = 0; count < 1000; count++) {
if ((p->flags & SKIP_RELOC) == 0) {
for (j = 0; j < m; j++)
reloc[j].presumed_offset = -1;
if (p->flags & CYCLE_BATCH) {
c = (c + 1) % 16;
gem_exec[MAX_NUM_EXEC].handle = cycle[c];
}
}
if (p->flags & FAULT) {
munmap(reloc, size);
reloc = __gem_mmap__cpu(fd, reloc_handle, 0, size, PROT_READ | PROT_WRITE);
gem_exec[MAX_NUM_EXEC].relocs_ptr = to_user_pointer(reloc);
}
gem_execbuf(fd, &execbuf);
}
gettimeofday(&end, NULL);
c = 16;
do
gem_sync(fd, cycle[--c]);
while (c != 0);
gem_exec[MAX_NUM_EXEC].handle = cycle[c];
elapsed[i][0] = ELAPSED(&start, &end);
if (p->flags & FAULT)
munmap(reloc, size);
}
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");
}
if (p->flags & FAULT)
igt_enable_prefault();
}
}
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