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b=EQ98xnfstNm40Ez0ScnEWb6m69RKTpveEKd5hI0GYVYJK4zCL2YspNskOb+WHn4o6bDX6t2xdr0uYO08jetHbxCDIuch2HUdAyHxFWYSS3K36pLQNZAMl7+xnobPv2EaU/JFAO1A/s6Str1OGszD1f36D0tEuLvcsWGi+mqAFtM4jIytnAXnHWs+7e94YPAobcTlqroUpYeZ8MZeuvJtn0oIqSRgaqKe9TTWxZKf76K80gtxShh48Y7LAY EruqXs5SZeJr1N0XewsfQYuVKMPms5T4yi3Os6llsTVWdrCWQCLlCfXRhDGIsjlTU5oG72cy52fRM2/8XP18/y5SfFjg== ARC-Authentication-Results: i=1; mx.dynu.com; dkim=none; dmarc=fail Received: from GRAPHRT (188-24-194-9.rdsnet.ro [188.24.194.9]) by mx1.wiredblade.com with ESMTPSA (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256) ; Mon, 29 Jun 2026 09:33:24 +0000 X-Original-Rcpt-To: m95d+git@psihoexpert.ro Date: Mon, 29 Jun 2026 12:33:28 +0300 From: Marius Dinu To: Erik Faye-Lund Cc: Boris Brezillon , Marius Dinu , dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, Steven Price , Liviu Dudau Subject: Re: [BUG] drm/panthor: intermittent freezes in Xorg xserver Message-ID: References: <20260629094419.6bb56d99@fedora-2.home> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Authentication-Results: mx.dynu.com; dkim=none; dmarc=fail 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Mon, 2026-06-29 10.51.32 ++0200, Erik Faye-Lund wrote: > Silly me, I forgot to disable HTML email, so this one bounced for > some, resending. Sorry about the duplicate. > > I wonder if you're experiencing the same issue as this? > > https://gitlab.freedesktop.org/mesa/mesa/-/work_items/15116 > I have no ideea. That bug report is way above my understanding. Sorry. > > > On Mon, Jun 29, 2026 at 10:24 AM Boris Brezillon wrote: > >> > >> On Fri, 26 Jun 2026 14:50:17 +0300 > >> Marius Dinu wrote: > >> > >> > Hi. > >> > > >> > The system is Radxa Rock 5 ITX, RK3588, 32GB RAM, > >> > mainline kernel v7.1.0 with panthor driver, mesa 26.0.7 with panfrost driver, > >> > xorg-server v21.1.22 accelerated by modesetting driver, x11perf v1.7.0. > >> > >> Are we sure that's a panthor issue? Also, is this a regression > >> introduced by the latest kernel version, or has it been like that from > >> the start? > >> > >> Also, would you mind opening an issue on [1]? > >> > >> > > >> > The most clean way to reproduce this bug: > >> > Form a console or ssh session, start Xorg in background, without a window > >> > manager, and then run x11perf on that display. > >> > > >> > Xorg :0 & > >> > x11perf -all -display :0 > >> > > >> > The bug: weird intermittent performance issues in some of the tests. > >> > Examples: > >> > > >> > 1000 reps @ 18.0799 msec ( 55.3/sec): 10x10 rectangle outline > >> > 1000 reps @ 18.0791 msec ( 55.3/sec): 10x10 rectangle outline > >> > 1000 reps @ 18.0790 msec ( 55.3/sec): 10x10 rectangle outline > >> > 1000 reps @ 18.0789 msec ( 55.3/sec): 10x10 rectangle outline > >> > 1000 reps @ 0.0287 msec ( 34800.0/sec): 10x10 rectangle outline > >> > 5000 trep @ 14.4691 msec ( 69.1/sec): 10x10 rectangle outline > >> > > >> > 5000000 reps @ 0.0029 msec (345000.0/sec): 1-pixel solid circle > >> > 5000000 reps @ 0.0009 msec (1100000.0/sec): 1-pixel solid circle > >> > 5000000 reps @ 0.0012 msec (818000.0/sec): 1-pixel solid circle > >> > 5000000 reps @ 0.0000 msec (20900000.0/sec): 1-pixel solid circle > >> > 5000000 reps @ 0.0000 msec (32300000.0/sec): 1-pixel solid circle > >> > 25000000 trep @ 0.0010 msec (979000.0/sec): 1-pixel solid circle > >> > > >> > 1000 reps @ 31.6607 msec ( 31.6/sec): Fill 10x10 trapezoid > >> > 1000 reps @ 16.9012 msec ( 59.2/sec): Fill 10x10 trapezoid > >> > 1000 reps @ 0.0234 msec ( 42700.0/sec): Fill 10x10 trapezoid > >> > 1000 reps @ 0.0272 msec ( 36700.0/sec): Fill 10x10 trapezoid > >> > 1000 reps @ 32.1268 msec ( 31.1/sec): Fill 10x10 trapezoid > >> > 5000 trep @ 16.1479 msec ( 61.9/sec): Fill 10x10 trapezoid > >> > > >> > There are no messages in kernel log or Xorg log. > >> > > >> > Visually, most of the tests runs fast as expected, but in some of the tests > >> > it gets "stuck" randomly. The test suddenly freezes while drawing the pattern. > >> > Then, after a while (a few seconds up to a couple of minutes), it gets > >> > unstuck by itself, draws a few more patterns extremely fast for less than a > >> > second, and then it gets stuck again. > >> > >> It smells like a signalling issue. Can you check the CPU activity and > >> report any outstanding process? Can you maybe connect a gdb to the > >> x11perf to see where it's blocked, and post the backtrace here (or in > >> the gitlab issue)? > >> > >> Regards, > >> > >> Boris > >> > >> [1]https://gitlab.freedesktop.org/mesa/mesa Marius