From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757949Ab1CBDyS (ORCPT ); Tue, 1 Mar 2011 22:54:18 -0500 Received: from mx1.redhat.com ([209.132.183.28]:27422 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756822Ab1CBDyP convert rfc822-to-8bit (ORCPT ); Tue, 1 Mar 2011 22:54:15 -0500 Date: Wed, 2 Mar 2011 11:58:21 +0800 From: Han Pingtian To: linux-kernel@vger.kernel.org Cc: Arnaldo Carvalho de Melo , Peter Zijlstra Subject: [BUG] perf failed on multi-cpus system with multi-events specified Message-ID: <20110302035821.GA5186@hpt.nay.redhat.com> Mail-Followup-To: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , Peter Zijlstra MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 8BIT User-Agent: Mutt/1.5.20 (2009-12-10) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On a Nehalem-EX system, which has 24 CPUs, perf commands with multi-events specified fail: [root@intel-s3e36-01 perf]# ./perf record -e syscalls:sys_enter_sched_get_priority_min -e kmem:mm_kernel_pagefault -e workqueue:workqueue_execution -e writeback:writeback_pages_written -e kmem:mm_kernel_pagefault -e writeback:writeback_bdi_unregister -e syscalls:sys_exit_capset -e syscalls:sys_enter_sched_get_priority_min -e writeback:writeback_exec -e syscalls:sys_enter_vmsplice -e syscalls:sys_exit_mprotect -e block:block_rq_complete -e syscalls:sys_enter_readlinkat -e signal:signal_overflow_fail -e syscalls:sys_exit_sendfile64 -e block:block_bio_backmerge -e syscalls:sys_exit_unlink -e syscalls:sys_exit_keyctl -e jbd2:jbd2_submit_inode_data -e syscalls:sys_enter_tgkill -e syscalls:sys_exit_lremovexattr -e syscalls:sys_exit_munmap -e syscalls:sys_enter_mmap -e syscalls:sys_exit_sched_getparam -e syscalls:sys_exit_getpgid -e syscalls:sys_exit_clock_getres -e block:block_split -e ext4:ext4_mballoc_discard -e task-clock -e syscalls:sys_enter_sendfile64 -e syscalls:sys_enter_ptrace -e syscalls:sys_enter_nanosleep -e syscalls:sys_exit_setdomainname -e writeback:writeback_nowork -e syscalls:sys_exit_mbind -e ext4:ext4_da_write_begin -e syscalls:sys_enter_recvfrom -e syscalls:sys_enter_write -e syscalls:sys_exit_getresgid -e syscalls:sys_exit_fsync -e syscalls:sys_enter_rt_sigprocmask -e syscalls:sys_enter_getdents -e syscalls:sys_exit_semtimedop -f ls Error: sys_perf_event_open() syscall returned with -1 (Too many open files). /bin/dmesg may provide additional information. Fatal: No CONFIG_PERF_EVENTS=y kernel support configured? trace-cmd: Too many open files No memory to alloc tracepoints list [root@intel-s3e36-01 perf]# ./perf --version perf version 2.6.38.rc6.166.g493f33 [root@intel-s3e36-01 perf]# On another latop which has only two CPUs, there is no this problem. -- Han Pingtian Quality Engineer hpt @ #kernel-qe Red Hat, Inc Freedom ... courage ... Commitment ... ACCOUNTABILITY