Commit 7d7569ac authored Feb 09, 2020 by Chris Wilson

drm/i915/execlists: Ignore tracek for nop process_csb

Recording the frequent inspection of CSB head/tail when there is
expected to be no update adds noise to the debug trace. (Not entirely
useless, but since we know the sequence of function calls, we can
surmise the function was called -- so redundant.)

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/20200209131922.180287-2-chris@chris-wilson.co.uk

parent 26208d87

drivers/gpu/drm/i915/gt/intel_lrc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2248,7 +2248,6 @@ static void process_csb(struct intel_engine_cs *engine)
		*/
		head = execlists->csb_head;
		tail = READ_ONCE(*execlists->csb_write);
		ENGINE_TRACE(engine, "cs-irq head=%d, tail=%d\n", head, tail);
		if (unlikely(head == tail))
		return;

		@@ -2262,6 +2261,7 @@ static void process_csb(struct intel_engine_cs *engine)
		*/
		rmb();

		ENGINE_TRACE(engine, "cs-irq head=%d, tail=%d\n", head, tail);
		do {
		bool promote;