From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756892AbYAIXbE (ORCPT ); Wed, 9 Jan 2008 18:31:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754878AbYAIXat (ORCPT ); Wed, 9 Jan 2008 18:30:49 -0500 Received: from ms-smtp-05.nyroc.rr.com ([24.24.2.59]:57454 "EHLO ms-smtp-05.nyroc.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754723AbYAIXar (ORCPT ); Wed, 9 Jan 2008 18:30:47 -0500 Message-Id: <20080109233043.661075252@goodmis.org> References: <20080109232914.676624725@goodmis.org> User-Agent: quilt/0.46-1 Date: Wed, 09 Jan 2008 18:29:23 -0500 From: Steven Rostedt To: LKML Cc: Ingo Molnar , Linus Torvalds , Andrew Morton , Peter Zijlstra , Christoph Hellwig , Mathieu Desnoyers , Gregory Haskins , Arnaldo Carvalho de Melo , Thomas Gleixner , Tim Bird , Sam Ravnborg , "Frank Ch. Eigler" , Steven Rostedt Subject: [RFC PATCH 09/22 -v2] mcount tracer show task comm and pid Content-Disposition: inline; filename=mcount-tracer-add-pid-comm.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This adds the task comm and pid to the trace output. This gives the output like: CPU 0: sshd:2605 [] remove_wait_queue+0xc/0x4a <-- [] free_poll_entry+0x1e/0x2a CPU 2: bash:2610 [] tty_check_change+0x9/0xb6 <-- [] tty_ioctl+0x59f/0xcdd CPU 0: sshd:2605 [] _spin_lock_irqsave+0xe/0x81 <-- [] remove_wait_queue+0x17/0x4a CPU 2: bash:2610 [] find_vpid+0x9/0x24 <-- [] tty_ioctl+0x62f/0xcdd CPU 0: sshd:2605 [] _spin_unlock_irqrestore+0x9/0x3a <-- [] remove_wait_queue+0x45/0x4a CPU 0: sshd:2605 [] fput+0x9/0x1b <-- [] free_poll_entry+0x26/0x2a Signed-off-by: Steven Rostedt --- lib/tracing/tracer.c | 6 +++++- lib/tracing/tracer.h | 3 +++ 2 files changed, 8 insertions(+), 1 deletion(-) Index: linux-compile-i386.git/lib/tracing/tracer.c =================================================================== --- linux-compile-i386.git.orig/lib/tracing/tracer.c 2008-01-09 14:12:52.000000000 -0500 +++ linux-compile-i386.git/lib/tracing/tracer.c 2008-01-09 15:17:39.000000000 -0500 @@ -34,6 +34,7 @@ mctracer_add_trace_entry(struct mctracer { unsigned long idx, idx_next; struct mctracer_entry *entry; + struct task_struct *tsk = current; idx = tr->trace_idx[cpu]; idx_next = idx + 1; @@ -52,6 +53,8 @@ mctracer_add_trace_entry(struct mctracer entry->idx = atomic_inc_return(&tr->cnt); entry->ip = ip; entry->parent_ip = parent_ip; + entry->pid = tsk->pid; + memcpy(entry->comm, tsk->comm, TASK_COMM_LEN); } static notrace void trace_function(const unsigned long ip, @@ -217,7 +220,8 @@ static int s_show(struct seq_file *m, vo if (iter->ent == NULL) { seq_printf(m, "mctracer:\n"); } else { - seq_printf(m, " CPU %d: ", iter->cpu); + seq_printf(m, "CPU %d: ", iter->cpu); + seq_printf(m, "%s:%d ", iter->ent->comm, iter->ent->pid); seq_print_ip_sym(m, iter->ent->ip); if (iter->ent->parent_ip) { seq_printf(m, " <-- "); Index: linux-compile-i386.git/lib/tracing/tracer.h =================================================================== --- linux-compile-i386.git.orig/lib/tracing/tracer.h 2008-01-09 14:11:35.000000000 -0500 +++ linux-compile-i386.git/lib/tracing/tracer.h 2008-01-09 15:17:39.000000000 -0500 @@ -2,11 +2,14 @@ #define _LINUX_MCOUNT_TRACER_H #include +#include struct mctracer_entry { unsigned long idx; unsigned long ip; unsigned long parent_ip; + char comm[TASK_COMM_LEN]; + pid_t pid; }; struct mctracer_trace { --