diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-05-08 09:06:25 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-05-08 15:06:35 +0100 |
| commit | 519a019491b833209b2920f0fe9db4aa22da6bbe (patch) | |
| tree | 3a7a74045f76ae510a7f6087c8af67734690a5da /drivers/gpu/drm/i915/i915_debugfs.c | |
| parent | 18ecc6c55bcb52e958d1257def58df86ceef7ece (diff) | |
drm/i915/hangcheck: Replace hangcheck.seqno with RING_HEAD
After realising we need to sample RING_START to detect context switches
from preemption events that do not allow for the seqno to advance, we
can also realise that the seqno itself is just a distance along the ring
and so can be replaced by sampling RING_HEAD.
v2: Bonus comment for the mystery separate CS_STALL before MI_USER_INTERRUPT
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190508080704.24223-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index b6094063be9b..cb9b56fb6a8a 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -1288,7 +1288,6 @@ static int i915_hangcheck_info(struct seq_file *m, void *unused) struct drm_i915_private *dev_priv = node_to_i915(m->private); struct intel_engine_cs *engine; u64 acthd[I915_NUM_ENGINES]; - u32 seqno[I915_NUM_ENGINES]; struct intel_instdone instdone; intel_wakeref_t wakeref; enum intel_engine_id id; @@ -1305,10 +1304,8 @@ static int i915_hangcheck_info(struct seq_file *m, void *unused) } with_intel_runtime_pm(dev_priv, wakeref) { - for_each_engine(engine, dev_priv, id) { + for_each_engine(engine, dev_priv, id) acthd[id] = intel_engine_get_active_head(engine); - seqno[id] = intel_engine_get_hangcheck_seqno(engine); - } intel_engine_get_instdone(dev_priv->engine[RCS0], &instdone); } @@ -1325,11 +1322,8 @@ static int i915_hangcheck_info(struct seq_file *m, void *unused) seq_printf(m, "GT active? %s\n", yesno(dev_priv->gt.awake)); for_each_engine(engine, dev_priv, id) { - seq_printf(m, "%s:\n", engine->name); - seq_printf(m, "\tseqno = %x [current %x, last %x], %dms ago\n", - engine->hangcheck.last_seqno, - seqno[id], - engine->hangcheck.next_seqno, + seq_printf(m, "%s: %d ms ago\n", + engine->name, jiffies_to_msecs(jiffies - engine->hangcheck.action_timestamp)); |