Include the signalers each request in the timeline is waiting on, as a
means to try and identify the cause of a stall. This can be quite
verbose, even as for now we only show each request in the timeline and
its immediate antecedents.
This generates output like:
Timeline 886: { count 1, ready: 0, inflight: 0, seqno: { current: 664, last: 666 }, engine: rcs0 }
U 886:29a- prio=0 @ 134ms: gem_exec_parall<4621>
U bc1:27a- prio=0 @ 134ms: gem_exec_parall[4917]
Timeline 825: { count 1, ready: 0, inflight: 0, seqno: { current: 802, last: 804 }, engine: vcs0 }
U 825:324 prio=0 @ 107ms: gem_exec_parall<4518>
U b75:140- prio=0 @ 110ms: gem_exec_parall<5486>
Timeline b46: { count 1, ready: 0, inflight: 0, seqno: { current: 782, last: 784 }, engine: vcs0 }
U b46:310- prio=0 @ 70ms: gem_exec_parall<5428>
U c11:170- prio=0 @ 70ms: gem_exec_parall[5501]
Timeline 96b: { count 1, ready: 0, inflight: 0, seqno: { current: 632, last: 634 }, engine: vcs0 }
U 96b:27a- prio=0 @ 67ms: gem_exec_parall<4878>
U b75:19e- prio=0 @ 67ms: gem_exec_parall<5486>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201119165616.10834-6-chris@chris-wilson.co.uk
#include "i915_debugfs.h"
#include "i915_debugfs_params.h"
#include "i915_irq.h"
+#include "i915_scheduler.h"
#include "i915_trace.h"
#include "intel_pm.h"
#include "intel_sideband.h"
for_each_uabi_engine(engine, i915)
intel_engine_dump(engine, &p, "%s\n", engine->name);
- intel_gt_show_timelines(&i915->gt, &p, NULL);
+ intel_gt_show_timelines(&i915->gt, &p, i915_request_show_with_schedule);
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
spin_unlock_irq(&schedule_lock);
}
+void i915_request_show_with_schedule(struct drm_printer *m,
+ const struct i915_request *rq,
+ const char *prefix,
+ int indent)
+{
+ struct i915_dependency *dep;
+
+ i915_request_show(m, rq, prefix, indent);
+ if (i915_request_completed(rq))
+ return;
+
+ rcu_read_lock();
+ for_each_signaler(dep, rq) {
+ const struct i915_request *signaler =
+ node_to_request(dep->signaler);
+
+ /* Dependencies along the same timeline are expected. */
+ if (signaler->timeline == rq->timeline)
+ continue;
+
+ if (i915_request_completed(signaler))
+ continue;
+
+ i915_request_show(m, signaler, prefix, indent + 2);
+ }
+ rcu_read_unlock();
+}
+
static void i915_global_scheduler_shrink(void)
{
kmem_cache_shrink(global.slab_dependencies);
#include "i915_scheduler_types.h"
+struct drm_printer;
+
#define priolist_for_each_request(it, plist, idx) \
for (idx = 0; idx < ARRAY_SIZE((plist)->requests); idx++) \
list_for_each_entry(it, &(plist)->requests[idx], sched.link)
__i915_priolist_free(p);
}
+void i915_request_show_with_schedule(struct drm_printer *m,
+ const struct i915_request *rq,
+ const char *prefix,
+ int indent);
+
#endif /* _I915_SCHEDULER_H_ */