From owner-freebsd-stable@freebsd.org Wed Sep 14 22:17:18 2016 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8497BBDAB07 for ; Wed, 14 Sep 2016 22:17:18 +0000 (UTC) (envelope-from oliver.pinter@hardenedbsd.org) Received: from mail-wm0-x233.google.com (mail-wm0-x233.google.com [IPv6:2a00:1450:400c:c09::233]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 117F41A97 for ; Wed, 14 Sep 2016 22:17:18 +0000 (UTC) (envelope-from oliver.pinter@hardenedbsd.org) Received: by mail-wm0-x233.google.com with SMTP id l68so167395wml.1 for ; Wed, 14 Sep 2016 15:17:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hardenedbsd-org.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=P/pkt4vS3mTjgFBz5qEIIiUTCyAilSUJHcHDeJRdV5U=; b=ce+Jka2Hd/CnQO6AB5/eX4UIHWByQr12vbjOyNab1RHy1kja1Fh7c4W0ieUJyHfGW5 WIFAIW3bmIMhCTQu+N+1NA27PyplASy60iSEy6gzpJ8cEnoBZywDgiUQ0JtOXp6ai8Ro lIEUnItpb+A7ySZMeO/VHFQrc+3dpZ/QkFa23YRxhpWybh9tEb3BwWcJhDfHEF4Eynty OvJUTsxC12Tbr78jJezcoXH8PhyQvhzHNt8vC3cteSEud8W6ZZxB5G6nx1yv1+C9dHZX E+7PYBncyDifULwTBe47Va+c1t6XoTqUONK8QyVX7X2agQ05KOYXgVKZuvza5PK02Elc fYcw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=P/pkt4vS3mTjgFBz5qEIIiUTCyAilSUJHcHDeJRdV5U=; b=J7XVbieF5CQG8ZMbnSBygorQDZ0p10mIQalNf/zXz71wMbvV+2onoX3KaqJXUYkQU+ TeCNEmhURa8Ye3EtUQ30tK0k8TYoKfMSJeowhwi42+4CiSso4m/C7wjlJA2iHRUtefQm kypRu5thcAbcqTHn19SJdVUWM44EfqPs+dcjU32wNwNmgNT3iYIxq2dTMDKYLi8Pfuak ckSdVibL9nyUkrfOjSImIqGEDnoaBfMov6cbsg55TStVOwswRgnPSo16KSGyBOk8Ysi/ QDGeEVPtefMDdrgj8EnImf0G2MnfLx7wJvHMeVQsSomr3Ydi0YRsuoOCij5o9Fd8HH4q Hd2Q== X-Gm-Message-State: AE9vXwOlKp0f5HlKqu14WsAQeUqDYHahocwFS7W9ITcbYWVg1oIIFYoNMzl+zxvmHR7soslqMs838tWJ8sCyyHyg X-Received: by 10.194.9.228 with SMTP id d4mr4716146wjb.135.1473891436623; Wed, 14 Sep 2016 15:17:16 -0700 (PDT) MIME-Version: 1.0 Received: by 10.80.139.208 with HTTP; Wed, 14 Sep 2016 15:17:16 -0700 (PDT) In-Reply-To: References: <20160904215739.GC22212@zxy.spb.ru> <20160905014612.GA42393@strugglingcoder.info> <20160905074348.GE34394@zxy.spb.ru> From: Oliver Pinter Date: Thu, 15 Sep 2016 00:17:16 +0200 Message-ID: Subject: 11.0 stuck on high network load To: Warner Losh Cc: Slawa Olhovchenkov , FreeBSD-STABLE Mailing List , hiren panchasara Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Sep 2016 22:17:18 -0000 On Monday, September 5, 2016, Warner Losh > wrote: > On Mon, Sep 5, 2016 at 1:43 AM, Slawa Olhovchenkov wrote: > > On Sun, Sep 04, 2016 at 06:46:12PM -0700, hiren panchasara wrote: > > > >> On 09/05/16 at 12:57P, Slawa Olhovchenkov wrote: > >> > I am try using 11.0 on Dual E5-2620 (no X2APIC). > >> > Under high network load and may be addtional conditional system go to > >> > unresponsible state -- no reaction to network and console (USB IPMI > >> > emulation). INVARIANTS give to high overhad. Is this exist some way to > >> > debug this? > >> > >> Can you panic it from console to get to db> to get backtrace and other > >> info when it goes unresponsive? > > > > no > > no reaction > > So the canonical 'ipmitool chassis power diag' doesn't send an NMI to > get you to the debugger? > > I've seen this at Netflix on one variant of our flash offload box with > a Intel e5-2697v2 running with the Chelsio driver. We're working > around it by having fewer receive threads than CPUs in the system. The > only way the boxes would come back was with watchdog. The load was > streaming video > ~36Gbps out 4 lagged 10G ports. Console is totally > unresponsive as well. > Try to set kern.sched.preempt_thresh sysctl to 224 to get back your > console.. > This is on our FreeBSD-10 stable based fork. > From my debugging, we go from totally fine as far as I can tell from > ps, etc in the moments leading to the hang to being totally wedged. It > seems a very sudden-onset condition. Sound at all familiar? > > Warner > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >