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authorChris Wilson <chris@chris-wilson.co.uk>2015-03-19 15:24:52 +0000
committerChris Wilson <chris@chris-wilson.co.uk>2015-03-19 15:33:51 +0000
commite7d26df4198af40c92292cb4209fd803fa02062f (patch)
treeccfaa443978f3c3af946397846fe1966340a0164
parenta72d4056291efd2571105cbb0a254a9cde13c6c6 (diff)
igt/kms_vblank: Simple harness for measuring speed of drmWaitVBlank
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
-rw-r--r--tests/.gitignore1
-rw-r--r--tests/Makefile.sources2
-rw-r--r--tests/kms_vblank.c123
3 files changed, 126 insertions, 0 deletions
diff --git a/tests/.gitignore b/tests/.gitignore
index d2918a56..402e062d 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -140,6 +140,7 @@ kms_rotation_crc
kms_setmode
kms_sink_crc_basic
kms_universal_plane
+kms_vblank
multi-tests.txt
pm_lpsp
pm_rc6_residency
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index c32c37aa..a1659788 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -72,6 +72,7 @@ TESTS_progs_M = \
kms_flip \
kms_flip_event_leak \
kms_flip_tiling \
+ kms_flip_event_leak \
kms_mmio_vs_cs_flip \
kms_pipe_crc_basic \
kms_plane \
@@ -80,6 +81,7 @@ TESTS_progs_M = \
kms_rotation_crc \
kms_setmode \
kms_universal_plane \
+ kms_vblank \
pm_lpsp \
pm_rpm \
pm_rps \
diff --git a/tests/kms_vblank.c b/tests/kms_vblank.c
new file mode 100644
index 00000000..569390e9
--- /dev/null
+++ b/tests/kms_vblank.c
@@ -0,0 +1,123 @@
+/*
+ * 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);
+}