[igt-dev] [PATCH i-g-t v2] i915/kms_busy: reduce heartbeat intervals only if neccessary

[Andrzej Hajda <andrzej.hajda@intel.com>]

Reducing heartbeat intervals may downgrade individual engine resets
to full GPU resets. The latter is not desirable, especially
on simulations, which do not support GPU reset. Only tests with
reset flag enabled need reduced hearbeat intervals.

v2: moved timeouts init/restore to fixups of affected tests, to allow
    proper work in case test fail

Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
---
 tests/i915/kms_busy.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/tests/i915/kms_busy.c b/tests/i915/kms_busy.c
index 20d3058fb6f..3b838cb8005 100644
--- a/tests/i915/kms_busy.c
+++ b/tests/i915/kms_busy.c
@@ -390,8 +390,6 @@ igt_main_args("e", NULL, help_str, opt_handler, NULL)
 		{ "extended-modeset-hang-oldfb-with-reset", true, false, true },
 		{ "extended-modeset-hang-newfb-with-reset", true, true, true },
 	};
-	struct gem_engine_properties saved_gpu_timeouts[GEM_MAX_ENGINES];
-	int num_engines;
 	int fd;
 
 	igt_fixture {
@@ -409,8 +407,6 @@ igt_main_args("e", NULL, help_str, opt_handler, NULL)
 		for_each_pipe(&display, pipe)
 			active_pipes[last_pipe++] = pipe;
 		last_pipe--;
-
-		gpu_engines_init_timeouts(fd, ARRAY_SIZE(saved_gpu_timeouts), &num_engines, saved_gpu_timeouts);
 	}
 
 	/* XXX Extend to cover atomic rendering tests to all planes + legacy */
@@ -470,8 +466,16 @@ igt_main_args("e", NULL, help_str, opt_handler, NULL)
 	}
 
 	for (i = 0; i < sizeof(tests) / sizeof (tests[0]); i++) {
-		igt_fixture
+		struct gem_engine_properties saved_gpu_timeouts[GEM_MAX_ENGINES];
+		int num_engines;
+
+		igt_fixture {
 			igt_require(display.is_atomic);
+			if (tests[i].reset)
+				gpu_engines_init_timeouts(display.drm_fd,
+							  ARRAY_SIZE(saved_gpu_timeouts),
+							  &num_engines, saved_gpu_timeouts);
+		}
 
 		igt_subtest_with_dynamic(tests[i].name) {
 			igt_hang_t hang;
@@ -501,10 +505,14 @@ igt_main_args("e", NULL, help_str, opt_handler, NULL)
 
 			igt_disallow_hang(display.drm_fd, hang);
 		}
+
+		igt_fixture {
+			if (tests[i].reset)
+				gpu_engines_restore_timeouts(display.drm_fd, num_engines, saved_gpu_timeouts);
+		}
 	}
 
 	igt_fixture {
-		gpu_engines_restore_timeouts(fd, num_engines, saved_gpu_timeouts);
 		igt_display_fini(&display);
 		close(display.drm_fd);
 	}
-- 
2.34.1