Even if one client is blocked on a resource, that should not impact
another client.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
tests/i915/gem_ctx_exec.c | 122 +++++++++++++++++++++++++++++++++++++-
1 file changed, 121 insertions(+), 1 deletion(-)
diff --git a/tests/i915/gem_ctx_exec.c b/tests/i915/gem_ctx_exec.c
index ad2f9e545..d7cd56424 100644
--- a/tests/i915/gem_ctx_exec.c
+++ b/tests/i915/gem_ctx_exec.c
@@ -35,8 +35,9 @@
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
-#include <sys/stat.h>
#include <sys/ioctl.h>
+#include <sys/poll.h>
+#include <sys/stat.h>
#include <sys/time.h>
#include <drm.h>
@@ -331,6 +332,122 @@ static void nohangcheck_hostile(int i915)
close(i915);
}
+static void kill_children(int sig)
+{
+ sighandler_t old;
+
+ old = signal(sig, SIG_IGN);
+ kill(-getpgrp(), sig);
+ signal(sig, old);
+}
+
+static bool has_persistence(int i915)
+{
+ struct drm_i915_gem_context_param p = {
+ .param = I915_CONTEXT_PARAM_PERSISTENCE,
+ };
+ uint64_t saved;
+
+ if (__gem_context_get_param(i915, &p))
+ return false;
+
+ saved = p.value;
+ p.value = 0;
+ if (__gem_context_set_param(i915, &p))
+ return false;
+
+ p.value = saved;
+ return __gem_context_set_param(i915, &p) == 0;
+}
+
+static void pi_active(int i915)
+{
+ igt_spin_t *spin = igt_spin_new(i915);
+ unsigned long count = 0;
+ bool blocked = false;
+ struct pollfd pfd;
+ int lnk[2];
+ int *done;
+
+ igt_require(gem_scheduler_enabled(i915));
+ igt_require(has_persistence(i915)); /* for graceful error recovery */
+
+ done = mmap(NULL, 4096, PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
+ igt_assert(done != MAP_FAILED);
+
+ igt_assert(pipe(lnk) == 0);
+
+ igt_fork(child, 1) {
+ struct sigaction sa = { .sa_handler = alarm_handler };
+
+ sigaction(SIGHUP, &sa, NULL);
+
+ do {
+ uint32_t ctx;
+
+ if (__gem_context_clone(i915, 0,
+ I915_CONTEXT_CLONE_ENGINES |
+ I915_CONTEXT_CLONE_VM,
+ 0, &ctx))
+ break;
+
+ gem_context_set_persistence(i915, ctx, false);
+ if (READ_ONCE(*done))
+ break;
+
+ spin->execbuf.rsvd1 = ctx;
+ if (__execbuf(i915, &spin->execbuf))
+ break;
+
+ count++;
+ write(lnk[1], &count, sizeof(count));
+ } while (1);
+ }
+
+ pfd.fd = lnk[0];
+ pfd.events = POLLIN;
+ close(lnk[1]);
+
+ igt_until_timeout(90) {
+ if (poll(&pfd, 1, 1000) == 0) {
+ igt_info("Child blocked after %lu active contexts\n",
+ count);
+ blocked = true;
+ break;
+ }
+ read(pfd.fd, &count, sizeof(count));
+ }
+
+ if (blocked) {
+ struct sigaction old_sa, sa = { .sa_handler = alarm_handler };
+ struct itimerval itv;
+
+ sigaction(SIGALRM, &sa, &old_sa);
+ itv.it_value.tv_sec = 0;
+ itv.it_value.tv_usec = 250000; /* 250ms */
+ setitimer(ITIMER_REAL, &itv, NULL);
+
+ igt_assert_f(__execbuf(i915, &spin->execbuf) == 0,
+ "Active execbuf blocked for more than 250ms by %lu
child contexts\n",
+ count);
+
+ memset(&itv, 0, sizeof(itv));
+ setitimer(ITIMER_REAL, &itv, NULL);
+ sigaction(SIGALRM, &old_sa, NULL);
+ } else {
+ igt_info("Not blocked after %lu active contexts\n",
+ count);
+ }
+
+ *done = 1;
+ kill_children(SIGHUP);
+ igt_waitchildren();
+ gem_quiescent_gpu(i915);
+ close(lnk[0]);
+
+ munmap(done, 4096);
+}
+
igt_main
{
const uint32_t batch[2] = { 0, MI_BATCH_BUFFER_END };
@@ -375,6 +492,9 @@ igt_main
igt_subtest("basic-nohangcheck")
nohangcheck_hostile(fd);
+ igt_subtest("basic-pi-active")
+ pi_active(fd);
+
igt_subtest("reset-pin-leak") {
int i;
--
2.26.2
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