From 3fba517bdd03551f7c7ff21dfe1896c677cbccda Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Tue, 26 Jan 2016 10:34:42 -0800 Subject: [PATCH] vc4: Throttle outstanding rendering after submission. Just make sure that after we've submitted, we get to at least 5 (global) submits ago before we go on to do more. Prevents up to seconds of lag with window movement in X with xcompmgr -c. There may be useful tuning to do in the future, but for now this gets us usability. Cc: "11.0 11.1" Signed-off-by: Eric Anholt --- src/gallium/drivers/vc4/vc4_job.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/gallium/drivers/vc4/vc4_job.c b/src/gallium/drivers/vc4/vc4_job.c index e7b52e3..41660f6 100644 --- a/src/gallium/drivers/vc4/vc4_job.c +++ b/src/gallium/drivers/vc4/vc4_job.c @@ -250,6 +250,15 @@ vc4_job_submit(struct vc4_context *vc4) } } + if (vc4->last_emit_seqno - vc4->screen->finished_seqno > 5) { + if (!vc4_wait_seqno(vc4->screen, + vc4->last_emit_seqno - 5, + PIPE_TIMEOUT_INFINITE, + "job throttling")) { + fprintf(stderr, "Job throttling failed\n"); + } + } + if (vc4_debug & VC4_DEBUG_ALWAYS_SYNC) { if (!vc4_wait_seqno(vc4->screen, vc4->last_emit_seqno, PIPE_TIMEOUT_INFINITE, "sync")) { -- 2.7.4