This is meant to test the sysfs entry for showing rc6 residency in
milliseconds. Remember, sysfs is a permanent interface.
v2: use new get_card interface to try "all" devices
check rc6p and rc6pp in addition to rc6
v3: rename rc6_residency.c to sysfs_rc6_residency.c
print better error messages
skip test if rc6 isn't enabled
Signed-off-by: Ben Widawsky <benjamin.widawsky at intel.com>
---
lib/drmtest.h | 1 +
tests/Makefile.am | 1 +
tests/sysfs_rc6_residency.c | 107 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 109 insertions(+)
create mode 100644 tests/sysfs_rc6_residency.c
diff --git a/lib/drmtest.h b/lib/drmtest.h
index 96fbf1a..42f238c 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -35,6 +35,7 @@
#include "xf86drm.h"
#include "intel_batchbuffer.h"
+int drm_get_card(int master);
int drm_open_any(void);
int drm_open_any_master(void);
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 6544ec7..9c3b058 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -56,6 +56,7 @@ TESTS_progs = \
drm_vma_limiter_cpu \
drm_vma_limiter_gtt \
drm_vma_limiter_cached \
+ sysfs_rc6_residency \
$(NULL)
# IMPORTANT: The ZZ_ tests need to be run last!
diff --git a/tests/sysfs_rc6_residency.c b/tests/sysfs_rc6_residency.c
new file mode 100644
index 0000000..1772c87
--- /dev/null
+++ b/tests/sysfs_rc6_residency.c
@@ -0,0 +1,107 @@
+/*
+ * 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:
+ * Ben Widawsky <ben at bwidawsk.net>
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "drmtest.h"
+
+#define SLEEP_DURATION 3000 // in milliseconds
+#define RC6_FUDGE 900 // in milliseconds
+
+static unsigned int readit(const char *path)
+{
+ unsigned int ret;
+
+ FILE *file;
+ file = fopen(path, "r");
+ if (file == NULL) {
+ fprintf(stderr, "Couldn't open %s (%d)\n", path, errno);
+ abort();
+ }
+ fscanf(file, "%u", &ret);
+ fclose(file);
+
+ return ret;
+}
+
+int main(int argc, char *argv[])
+{
+ const int device = drm_get_card(0);
+ char *path, *pathp, *pathpp;
+ int fd, ret;
+ unsigned int value1, value1p, value1pp, value2, value2p, value2pp;
+ int diff;
+
+ /* Use drm_open_any to verify device existence */
+ fd = drm_open_any();
+ close(fd);
+
+ ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6", device);
+ assert(ret != -1);
+
+ if (readit(path) == 0)
+ exit(EXIT_SUCCESS);
+
+ ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6", device);
+ assert(ret != -1);
+ ret = asprintf(&pathp, "/sys/class/drm/card%d/power/rc6p", device);
+ assert(ret != -1);
+ ret = asprintf(&pathpp, "/sys/class/drm/card%d/power/rc6pp", device);
+ assert(ret != -1);
+
+ value1 = readit(path);
+ value1p = readit(pathp);
+ value1pp = readit(pathpp);
+ sleep(SLEEP_DURATION / 1000);
+ value2 = readit(path);
+ value2p = readit(pathp);
+ value2pp = readit(pathpp);
+
+ free(pathpp);
+ free(pathp);
+ free(path);
+
+ diff = (value2pp - value1pp) +
+ (value2p - value1p) +
+ (value2 - value1);
+
+ if (diff > (SLEEP_DURATION + RC6_FUDGE)) {
+ fprintf(stderr, "Diff was too high. That is unpossible\n");
+ exit(EXIT_FAILURE);
+ }
+ if (diff < (SLEEP_DURATION - RC6_FUDGE)) {
+ fprintf(stderr, "GPU was not in RC6 long enough. Check that "
+ "the GPU is as idle as possible (ie. no X, "
+ "running and running no other tests)\n");
+ exit(EXIT_FAILURE);
+ }
+
+ exit(EXIT_SUCCESS);
+}
--
1.7.9.4
