From owner-freebsd-bugs@FreeBSD.ORG Mon Dec 12 05:10:04 2005 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6FADC16A41F for ; Mon, 12 Dec 2005 05:10:04 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id AA90C43D5F for ; Mon, 12 Dec 2005 05:10:02 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id jBC5A2u5039661 for ; Mon, 12 Dec 2005 05:10:02 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id jBC5A2wX039660; Mon, 12 Dec 2005 05:10:02 GMT (envelope-from gnats) Resent-Date: Mon, 12 Dec 2005 05:10:02 GMT Resent-Message-Id: <200512120510.jBC5A2wX039660@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Eric Anholt Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A8BDE16A420 for ; Mon, 12 Dec 2005 05:02:30 +0000 (GMT) (envelope-from anholt@leguin.anholt.net) Received: from leguin.anholt.net (69-30-77-85.dq1sn.easystreet.com [69.30.77.85]) by mx1.FreeBSD.org (Postfix) with ESMTP id 89E4843D4C for ; Mon, 12 Dec 2005 05:02:29 +0000 (GMT) (envelope-from anholt@leguin.anholt.net) Received: from leguin.anholt.net (localhost [127.0.0.1]) by leguin.anholt.net (8.13.4/8.13.1) with ESMTP id jBC52SVl001399 for ; Sun, 11 Dec 2005 21:02:28 -0800 (PST) (envelope-from anholt@leguin.anholt.net) Received: (from anholt@localhost) by leguin.anholt.net (8.13.4/8.13.1/Submit) id jBC52RUp001398; Sun, 11 Dec 2005 21:02:27 -0800 (PST) (envelope-from anholt) Message-Id: <200512120502.jBC52RUp001398@leguin.anholt.net> Date: Sun, 11 Dec 2005 21:02:27 -0800 (PST) From: Eric Anholt To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: kern/90269: panic in pmc sampling mode X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Eric Anholt List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Dec 2005 05:10:04 -0000 >Number: 90269 >Category: kern >Synopsis: panic in pmc sampling mode >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Dec 12 05:10:02 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Eric Anholt >Release: FreeBSD 7.0-CURRENT amd64 >Organization: >Environment: System: FreeBSD leguin.anholt.net 7.0-CURRENT FreeBSD 7.0-CURRENT #22: Thu Dec 1 01:48:14 PST 2005 anholt@leguin.anholt.net:/usr/obj/usr/src/current/sys/MYKERNEL amd64 >Description: Attempting to use pmc to profile a library I'm working on results in panics. While I couldn't get a dump, here's the backtrace: kdb_enter() at kdb_enter+0x2f panic() at panic+0x249 pmc_release_pmc_descriptor() at pmc_release_pmc_descriptor+0x2eb pmc_syscall_handler() at pmc_syscall_handler+0x41a syscall() at syscall+0x217 Xfast_syscall() at Xfast_syscall+0xa8 I didn't get the panic str, it looks like. Started my minicom log too late. I'll get that later by reproducing, but wanted to get the bug filed for now. >How-To-Repeat: Install liboil from ports Download and build libpcg from my website: http://www.anholt.net/libpcg/release/libpcg-0.2.1.tar.bz2 Try to run a shell script containing: pmcstat -S instructions -O samples.out ./tests/timing pmcstat -R samples.out -g Watch your serial console. It'll run for a couple of seconds, but then die (perhaps around the time that the program should be ending). I suspect the actual list of steps is not so specific, but it's what I'm using (modulo that I'm using current libpcg sources that I'm working on making faster :) >Fix: >Release-Note: >Audit-Trail: >Unformatted: