From patchwork Thu Mar 3 22:37:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Harrison X-Patchwork-Id: 12768223 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 6E534C433F5 for ; Thu, 3 Mar 2022 22:37:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 75D3110E38E; Thu, 3 Mar 2022 22:37:39 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id 59DD710E38C; Thu, 3 Mar 2022 22:37:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1646347058; x=1677883058; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=SAIZn7QMcErgUj045llNbSAaHZzAH+QF2uvWKFGNeXg=; b=dI7O9OBt+ullKZjoGAQHCGBtEPRrJumOdMIhZwGnTNI4Y2agMRC23GWV 4DOSVubWp0TIZ6O72pCkfcAxi9aP9QRbeqeXqSyFWYVybkhF4YpT03PPU tHby3QG/WrUFkTTu0n5EYA5scYauK0kh3qInzhrFY7HVjHEC/6aLosH4w ugXs6JVeJ+tQ1FSm6fEHl/S3utb+zIKJ49ae75if8g1HeupdJtCdw0otM TQlUjAhyYQZwGqIaNZsL5sFrtWWhtpAQRbIn2Fdm12X2AR8jcLXTMy+BJ YNSe1cNInqr7hmUyeFve8M9Tdxk+n9OtCk3gEtpUhgEd7iAIjNZE+nWan Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10275"; a="233794761" X-IronPort-AV: E=Sophos;i="5.90,153,1643702400"; d="scan'208";a="233794761" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Mar 2022 14:37:37 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,153,1643702400"; d="scan'208";a="609745278" Received: from relo-linux-5.jf.intel.com ([10.165.21.134]) by fmsmga004.fm.intel.com with ESMTP; 03 Mar 2022 14:37:37 -0800 From: John.C.Harrison@Intel.com To: Intel-GFX@Lists.FreeDesktop.Org Subject: [PATCH v3 0/4] Improve anti-pre-emption w/a for compute workloads Date: Thu, 3 Mar 2022 14:37:33 -0800 Message-Id: <20220303223737.708659-1-John.C.Harrison@Intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Organization: Intel Corporation (UK) Ltd. - Co. Reg. #1134945 - Pipers Way, Swindon SN3 1RJ X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: John Harrison , DRI-Devel@Lists.FreeDesktop.Org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: John Harrison Compute workloads are inherently not pre-emptible on current hardware. Thus the pre-emption timeout was disabled as a workaround to prevent unwanted resets. Instead, the hang detection was left to the heartbeat and its (longer) timeout. This is undesirable with GuC submission as the heartbeat is a full GT reset rather than a per engine reset and so is much more destructive. Instead, just bump the pre-emption timeout to a big value. Also, update the heartbeat to allow such a long pre-emption delay in the final heartbeat period. v2: Add clamping helpers. v3: Remove long timeout algorithm and replace with hard coded value (review feedback from Tvrtko). Also, fix execlist selftest failure and fix bug in compute enabling patch related to pre-emption timeouts. Signed-off-by: John Harrison John Harrison (4): drm/i915/guc: Limit scheduling properties to avoid overflow drm/i915: Fix compute pre-emption w/a to apply to compute engines drm/i915: Make the heartbeat play nice with long pre-emption timeouts drm/i915: Improve long running OCL w/a for GuC submission drivers/gpu/drm/i915/Kconfig.profile | 26 +++++- drivers/gpu/drm/i915/gt/intel_engine.h | 6 ++ drivers/gpu/drm/i915/gt/intel_engine_cs.c | 92 +++++++++++++++++-- .../gpu/drm/i915/gt/intel_engine_heartbeat.c | 18 ++++ drivers/gpu/drm/i915/gt/sysfs_engines.c | 25 +++-- drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 9 ++ 6 files changed, 153 insertions(+), 23 deletions(-)