lib: add igt_dummyload

A lot of igt testcases need some GPU workload to make sure a race
window is big enough. Unfortunately having a fixed amount of
workload leads to spurious test failures or overly long runtimes
on some fast/slow platforms. This library contains functionality
to submit GPU workloads that should consume exactly a specific
amount of time.

Since v14: Since we are using multiple signals, walk list of batches
to terminate a batch to avoid using a single global batch. Cycle signals
between SIGRTMIN and SIGRTMAX properly.

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: tomeu@tomeuvizoso.net
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/lib/igt_dummyload.h b/lib/igt_dummyload.h
new file mode 100644
index 00000000..2adfadf2
--- /dev/null
+++ b/lib/igt_dummyload.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright © 2016 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.
+ *
+ */
+
+#ifndef __IGT_DUMMYLOAD_H__
+#define __IGT_DUMMYLOAD_H__
+
+#include <stdint.h>
+#include <time.h>
+
+#include "igt_aux.h"
+
+typedef struct igt_spin {
+	unsigned int handle;
+	timer_t timer;
+	int signo;
+	struct igt_list link;
+	uint32_t *batch;
+} igt_spin_t;
+
+igt_spin_t *igt_spin_batch_new(int fd, int engine, unsigned int dep_handle);
+void igt_spin_batch_set_timeout(igt_spin_t *spin, int64_t ns);
+void igt_spin_batch_end(igt_spin_t *spin);
+void igt_spin_batch_free(int fd, igt_spin_t *spin);
+
+void igt_terminate_spin_batches(void);
+
+#endif /* __IGT_DUMMYLOAD_H__ */