[igt-dev] [PATCH igt] igt/gem_exec_whisper: Fork all-engine tests one-per-engine

[Chris Wilson]

Add a new mode for some more stress, submit the all-engines tests
simultaneously, a stream per engine.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 tests/gem_exec_whisper.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/tests/gem_exec_whisper.c b/tests/gem_exec_whisper.c
index ddf77cf0..e37bd733 100644
--- a/tests/gem_exec_whisper.c
+++ b/tests/gem_exec_whisper.c
@@ -99,6 +99,7 @@ static bool ignore_engine(int fd, unsigned engine)
 #define SYNC 0x40
 #define PRIORITY 0x80
 #define QUEUES 0x100
+#define ALL 0x200
 
 struct hang {
 	struct drm_i915_gem_exec_object2 obj;
@@ -208,6 +209,7 @@ static void whisper(int fd, unsigned engine, unsigned flags)
 	unsigned int eb_migrations = 0;
 	uint64_t old_offset;
 	int debugfs;
+	int nchild;
 
 	if (flags & PRIORITY) {
 		igt_require(gem_scheduler_enabled(fd));
@@ -223,6 +225,7 @@ static void whisper(int fd, unsigned engine, unsigned flags)
 				engines[nengine++] = engine;
 		}
 	} else {
+		igt_assert(!(flags & ALL));
 		igt_require(gem_has_ring(fd, engine));
 		igt_require(gem_can_store_dword(fd, engine));
 		engines[nengine++] = engine;
@@ -241,8 +244,19 @@ static void whisper(int fd, unsigned engine, unsigned flags)
 	if (flags & HANG)
 		init_hang(&hang);
 
+	nchild = 1;
+	if (flags & FORKED)
+		nchild *= sysconf(_SC_NPROCESSORS_ONLN);
+	if (flags & ALL)
+		nchild *= nengine;
+
 	intel_detect_and_clear_missed_interrupts(fd);
-	igt_fork(child, flags & FORKED ? sysconf(_SC_NPROCESSORS_ONLN) : 1)  {
+	igt_fork(child, nchild) {
+		if (flags & ALL) {
+			engines[0] = engines[child % nengine];
+			nengine = 1;
+		}
+
 		memset(&scratch, 0, sizeof(scratch));
 		scratch.handle = gem_create(fd, 4096);
 		scratch.flags = EXEC_OBJECT_WRITE;
@@ -345,7 +359,7 @@ static void whisper(int fd, unsigned engine, unsigned flags)
 			for (pass = 0; pass < 1024; pass++) {
 				uint64_t offset;
 
-				if (!(flags & FORKED))
+				if (nchild == 1)
 					write_seqno(debugfs, pass);
 
 				if (flags & HANG)
@@ -557,9 +571,12 @@ igt_main
 		igt_fork_hang_detector(fd);
 	}
 
-	for (const struct mode *m = modes; m->name; m++)
+	for (const struct mode *m = modes; m->name; m++) {
 		igt_subtest_f("%s", m->name)
 			whisper(fd, -1, m->flags);
+		igt_subtest_f("%s-all", m->name)
+			whisper(fd, -1, m->flags | ALL);
+	}
 
 	for (const struct intel_execution_engine *e = intel_execution_engines;
 	     e->name; e++) {
-- 
2.16.1