From patchwork Mon Jan 13 21:45:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 11330981 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E331192A for ; Mon, 13 Jan 2020 21:45:52 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CB12A2080D for ; Mon, 13 Jan 2020 21:45:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CB12A2080D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 11FF989C52; Mon, 13 Jan 2020 21:45:52 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id C8EBD89C52 for ; Mon, 13 Jan 2020 21:45:50 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from haswell.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 19867466-1500050 for ; Mon, 13 Jan 2020 21:45:47 +0000 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Mon, 13 Jan 2020 21:45:46 +0000 Message-Id: <20200113214546.1990139-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.25.0.rc2 MIME-Version: 1.0 Subject: [Intel-gfx] [CI] drm/i915/gt: Always reset the timeslice after a context switch X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Currently, we reset the timer after a pre-eemption event. This has the side-effect that the timeslice runs into the second context after the first is completed after a normal promotion event, causing the second context to be swapped out early and switched for a third context. To be more fair, we want to reset the clock after promotion as well. Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Reviewed-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20200113104442.1753973-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/gt/intel_lrc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 9af1b2b493f4..9e430590fb3a 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -1694,7 +1694,7 @@ active_timeslice(const struct intel_engine_cs *engine) { const struct i915_request *rq = *engine->execlists.active; - if (i915_request_completed(rq)) + if (!rq || i915_request_completed(rq)) return 0; if (engine->execlists.switch_priority_hint < effective_prio(rq)) @@ -2285,7 +2285,6 @@ static void process_csb(struct intel_engine_cs *engine) /* Point active to the new ELSP; prevent overwriting */ WRITE_ONCE(execlists->active, execlists->pending); - set_timeslice(engine); if (!inject_preempt_hang(execlists)) ring_set_paused(engine, 0); @@ -2326,6 +2325,7 @@ static void process_csb(struct intel_engine_cs *engine) } while (head != tail); execlists->csb_head = head; + set_timeslice(engine); /* * Gen11 has proven to fail wrt global observation point between