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/*
* Copyright © 2015 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.
*/
/** @file kms_vblank.c
*
* This is a test of performance of drmWaitVblank.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <time.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <drm.h>
#include "ioctl_wrappers.h"
#include "drmtest.h"
#include "igt_aux.h"
#include "igt_core.h"
#include "igt_gt.h"
#include "intel_bufmgr.h"
#include "intel_batchbuffer.h"
#include "intel_io.h"
#include "intel_chipset.h"
IGT_TEST_DESCRIPTION("Test speed of WaitVblank.");
static double elapsed(const struct timespec *start,
const struct timespec *end,
int loop)
{
return (1e6*(end->tv_sec - start->tv_sec) + (end->tv_nsec - start->tv_nsec)/1000)/loop;
}
static bool crtc0_active(int fd)
{
union drm_wait_vblank vbl;
memset(&vbl, 0, sizeof(vbl));
vbl.request.type = DRM_VBLANK_RELATIVE;
return drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl) == 0;
}
static void query(int fd, bool busy)
{
union drm_wait_vblank vbl;
struct timespec start, end;
unsigned long sq, count = 0;
char buf[4096];
memset(&vbl, 0, sizeof(vbl));
if (busy) {
vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
vbl.request.sequence = 72;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl));
}
vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 0;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl));
sq = vbl.reply.sequence;
clock_gettime(CLOCK_MONOTONIC, &start);
do {
vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 0;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl));
count++;
} while ((vbl.reply.sequence - sq) <= 60);
clock_gettime(CLOCK_MONOTONIC, &end);
igt_info("Time to query current counter (%s): %7.3fµs\n",
busy ? "busy" : "idle", elapsed(&start, &end, count));
if (busy)
read(fd, buf, sizeof(buf));
}
igt_main
{
int fd;
igt_skip_on_simulation();
igt_fixture {
fd = drm_open_any();
igt_require(crtc0_active(fd));
}
igt_subtest("query-idle")
query(fd, false);
igt_subtest("query-busy")
query(fd, true);
}
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