From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp2 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id gLtAHz+3aV+WWQAA0tVLHw (envelope-from ) for ; Tue, 22 Sep 2020 08:35:11 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp2 with LMTPS id OKAgGz+3aV8LZQAAB5/wlQ (envelope-from ) for ; Tue, 22 Sep 2020 08:35:11 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id BCF6994065D for ; Tue, 22 Sep 2020 08:35:10 +0000 (UTC) Received: from localhost ([::1]:36176 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kKdlV-0004bP-6B for larch@yhetil.org; Tue, 22 Sep 2020 04:35:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52968) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kKdlO-0004Zu-37 for guix-patches@gnu.org; Tue, 22 Sep 2020 04:35:02 -0400 Received: from debbugs.gnu.org ([209.51.188.43]:45558) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kKdlN-0007hZ-PM for guix-patches@gnu.org; Tue, 22 Sep 2020 04:35:01 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kKdlN-0002eR-LS for guix-patches@gnu.org; Tue, 22 Sep 2020 04:35:01 -0400 X-Loop: help-debbugs@gnu.org Subject: [bug#43552] [PATCH] Add watchdog support. Resent-From: Mathieu Othacehe Original-Sender: "Debbugs-submit" Resent-CC: guix-patches@gnu.org Resent-Date: Tue, 22 Sep 2020 08:35:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 43552 X-GNU-PR-Package: guix-patches X-GNU-PR-Keywords: patch To: 43552@debbugs.gnu.org Received: via spool by 43552-submit@debbugs.gnu.org id=B43552.160076365310130 (code B ref 43552); Tue, 22 Sep 2020 08:35:01 +0000 Received: (at 43552) by debbugs.gnu.org; 22 Sep 2020 08:34:13 +0000 Received: from localhost ([127.0.0.1]:57104 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kKdkb-0002dK-48 for submit@debbugs.gnu.org; Tue, 22 Sep 2020 04:34:13 -0400 Received: from eggs.gnu.org ([209.51.188.92]:45906) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kKdkZ-0002d3-JD for 43552@debbugs.gnu.org; Tue, 22 Sep 2020 04:34:12 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:45154) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kKdkU-0007bQ-9t for 43552@debbugs.gnu.org; Tue, 22 Sep 2020 04:34:06 -0400 Received: from [2a01:e0a:19b:d9a0:9d9d:97cc:d92a:8ac0] (port=34436 helo=cervin) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kKdkT-0006FA-Ig for 43552@debbugs.gnu.org; Tue, 22 Sep 2020 04:34:06 -0400 From: Mathieu Othacehe References: <20200921164908.1396570-1-othacehe@gnu.org> Date: Tue, 22 Sep 2020 10:34:03 +0200 In-Reply-To: <20200921164908.1396570-1-othacehe@gnu.org> (Mathieu Othacehe's message of "Mon, 21 Sep 2020 18:49:08 +0200") Message-ID: <87blhy1a84.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-Spam-Score: -3.3 (---) X-BeenThere: guix-patches@gnu.org List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-patches-bounces+larch=yhetil.org@gnu.org Sender: "Guix-patches" X-Scanner: scn0 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=none; spf=pass (aspmx1.migadu.com: domain of guix-patches-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-patches-bounces@gnu.org X-Spam-Score: -1.01 X-TUID: pwr1RfTIaFMt Hello, > I've noticed that during several hours all Cuirass fibers seem to be > stucked. I suspect that this is because a fiber is doing a blocking action, > hence preventing its scheduler to run other fibers. I think the issue is that we are communicating with guix-daemon over a blocking socket. When Cuirass calls "build-derivations", and the "read" over guix-daemon socket blocks, the whole Fiber scheduler is also blocked. As the GC is running for 6 - 7 hours a day[1], a Fiber scheduler is also blocked for that duration. There's still some activity happening on other schedulers, but that's still quite unfortunate. For instance, nothing has been fetched since 4:00 this morning. Thanks, Mathieu [1]: https://issues.guix.gnu.org/24937