Quoting Daniel Vetter (2017-08-07 17:26:56) > On Fri, Aug 04, 2017 at 06:05:10PM +0100, Chris Wilson wrote: > > Quoting Daniel Vetter (2017-08-04 17:07:22) > > > We now have full (or a lot at least) igt running in beta CI, and snb > > > blt hangs are really unhappy: > > > > > > - drv_hangman@error-state-capture-blt and gem_exec_capture@capture-blt > > > reliably result in insta-machine death when we try to reset the gpu, > > > both on the CI snb and the one I have here. > > > > > > - Other testcases also randomly (and sometimes rather rarely) die on > > > snb. > > > > > > We can't use the endless batch because that results in a reset failure > > > and wedged gpu, so also not really better. > > > > It shouldn't be the recursion, but the invalid instruction we use to try > > and trigger the hang quicker (otherwise hangcheck may see the advancing > > ACTHD and give us longer to escape the loop). > > > > In gem_exec_capture we shouldn't even need that invalid instruction, we > > just need the busy batch as we pull the trigger ourselves, and if that > > fails to reset a simple recursive batch we have some issues to resolve. > > Endless loop for haning results in a reset failure on blt as described in > the commit message. We end up with a permanent and unrecoverable -EIO, > which is as deadly to CI as outright killing the machine. No, it doesn't. snb-gt1 exhibiting the machine death on invalid blt instruction as reported, after fixes: Subtest error-state-basic: SUCCESS (0.001s) Subtest error-state-capture-render: SUCCESS (7.740s) Subtest error-state-capture-bsd: SUCCESS (6.024s) Test requirement not met in function test_error_state_capture, file drv_hangman.c:187: Test requirement: gem_has_ring(device, ring_id) Subtest error-state-capture-bsd1: SKIP (0.000s) Test requirement not met in function test_error_state_capture, file drv_hangman.c:187: Test requirement: gem_has_ring(device, ring_id) Subtest error-state-capture-bsd2: SKIP (0.000s) Subtest error-state-capture-blt: SUCCESS (13.965s) Test requirement not met in function test_error_state_capture, file drv_hangman.c:187: Test requirement: gem_has_ring(device, ring_id) Subtest error-state-capture-vebox: SKIP (0.000s) Subtest capture-render: SUCCESS (0.003s) Test requirement not met in function __real_main175, file gem_exec_capture.c:202: Test requirement: gem_can_store_dword(fd, e->exec_id | e->flags) Subtest capture-bsd: SKIP (0.000s) Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1642: Test requirement: gem_has_ring(fd, ring) Subtest capture-bsd1: SKIP (0.000s) Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1642: Test requirement: gem_has_ring(fd, ring) Subtest capture-bsd2: SKIP (0.000s) Subtest capture-blt: SUCCESS (0.002s) Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1642: Test requirement: gem_has_ring(fd, ring) Subtest capture-vebox: SKIP (0.000s) -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
