From mboxrd@z Thu Jan 1 00:00:00 1970 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 30D37C021AA for ; Wed, 19 Feb 2025 19:27:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F100E10E36E; Wed, 19 Feb 2025 19:27:42 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="gsAERBYU"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id EE5BB10E36E for ; Wed, 19 Feb 2025 19:27:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1739993262; x=1771529262; h=date:message-id:from:to:cc:subject:in-reply-to: references:mime-version; bh=mbeFuu5O4F18oB1KGsdngyRxvxZJTSlEP9BZasROaBI=; b=gsAERBYUrsIFK3Y99S2+Kb+U89bHhm6VF/yH7OftM7gjISLC6imiPf7C FpoMdsDHiYMD0nfLA9+fX/OKiSkI1TKNX/NsWlhtjIdIUhgL6mHO7MryJ GPFTAZeoB+iLkspOczXB6ZX2mOjNthM5Pgsz8yRgOmE1rqLmPRg5n37rE R/Qggbrdm86H5Bi+GBqrGOfMHIiowUegyjBV48JsE481jIR6L8KOCU4un BBukYhvk/PeorIK+lVbuABdEUv+FQHXLuNnBic73qYWg85h8pphQXQI2V uOvASFpqS8aZy4vDjIkw4ByVfz9h7j6s9GjxU3ahF9gQQ3PKfFLeN7d6j w==; X-CSE-ConnectionGUID: rXH/3VJmSr2bYkJagM1Sxg== X-CSE-MsgGUID: wermjqSrSYOTL9F+UO+60w== X-IronPort-AV: E=McAfee;i="6700,10204,11350"; a="40889015" X-IronPort-AV: E=Sophos;i="6.13,299,1732608000"; d="scan'208";a="40889015" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Feb 2025 11:27:41 -0800 X-CSE-ConnectionGUID: f1XdWPXiT06GV1gIcWMVmQ== X-CSE-MsgGUID: lzGEJUALQU6gdrj3xBb8Qg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,299,1732608000"; d="scan'208";a="145652906" Received: from orsosgc001.jf.intel.com (HELO orsosgc001.intel.com) ([10.165.21.142]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Feb 2025 11:27:41 -0800 Date: Wed, 19 Feb 2025 11:27:41 -0800 Message-ID: <85r03tohua.wl-ashutosh.dixit@intel.com> From: "Dixit, Ashutosh" To: Harish Chegondi Cc: , , , , Subject: Re: [PATCH v10 0/8] Add support for EU stall sampling In-Reply-To: References: User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/28.2 (x86_64-redhat-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On Tue, 18 Feb 2025 11:53:50 -0800, Harish Chegondi wrote: > > The following patch series add support for EU stall sampling, > a new hardware feature first added in PVC and is being supported > in XE2 and later architecture GPUs. This feature would enable > capturing of EU stall data which include the IP address of the > instruction stalled and various stall reason counts. > > Support for this feature is being added into Mesa: > https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30142 > > New IGT tests for EU stall sampling are being added: > https://patchwork.freedesktop.org/series/143030/ > > This patch series has undergone basic testing with the new IGT tests. > > Issues that need investigation: > 1. Blocked reads with small user buffers may be blocked even with EU > stall data in the kernel buffer as a previous read has set pollin to > false even when kernel buffer has data that could be read but the user > buffer is too small to read all the data. Related to the above would potentially be better locking for stream->pollin. > v2: Rename xe perf layer as xe observation layer (Ashutosh) > > Test-with: cover.1739901972.git.harish.chegondi@intel.com Not sure why we don't see the EU stall IGT's running in Xe.CI.Full.