Commit f8256288 authored Dec 03, 2013 by Jiri Olsa Committed by Arnaldo Carvalho de Melo Dec 04, 2013

tools lib traceevent: Add kmem plugin

Backporting kmem plugin.

Backported from Steven Rostedt's trace-cmd repo (HEAD 0f2c2fb):
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git



This plugin adds call_site field resolving for following tracepoint
events:

  kmem:kfree
  kmem:kmalloc
  kmem:kmalloc_node
  kmem:kmem_cache_alloc
  kmem:kmem_cache_alloc_node
  kmem:kmem_cache_free

The diff of 'perf script' output generated by old and new code: (data
was generated by 'perf record -e 'kmem:*' -a')

  --- script.kmem.old
  +++ script.kmem.new
  -            perf 27846 [001] 29643.403319: kmem:kfree: call_site=ffffffff810e64f6 ptr=(nil)
  +            perf 27846 [001] 29643.403238: kmem:kfree: (__audit_syscall_exit+0x1f6) call_site=ffffffff810e64f6 ptr=(nil)
  -            perf 27846 [001] 29643.403337: kmem:kmem_cache_alloc: call_site=ffffffff812ff0c5 ptr=0xffff88020e155630 bytes_req=560 bytes_alloc=568 gfp_flags=GFP_KERNEL
  +            perf 27846 [001] 29643.403337: kmem:kmem_cache_alloc: (radix_tree_preload+0x35) call_site=ffffffff812ff0c5 ptr=0xffff88020e155630 bytes_req=560 bytes_alloc=568 gfp_flags=GFP_KERNEL
  -            perf 27846 [001] 29643.403342: kmem:kmem_cache_free: call_site=ffffffff8126ec61 ptr=0xffff88020dffe750
  +            perf 27846 [001] 29643.403342: kmem:kmem_cache_free: (jbd2_journal_stop+0x221) call_site=ffffffff8126ec61 ptr=0xffff88020dffe750
  -         firefox   954 [000] 29643.445477: kmem:kmem_cache_alloc_node: call_site=ffffffff8153c64e ptr=0xffff8801cecb4000 bytes_req=256 bytes_alloc=256 gfp_flags=GFP_KERNEL|GFP_REPEAT node=-1
  +         firefox   954 [000] 29643.445477: kmem:kmem_cache_alloc_node: (__alloc_skb+0x4e) call_site=ffffffff8153c64e ptr=0xffff8801cecb4000 bytes_req=256 bytes_alloc=256 gfp_flags=GFP_KERNEL|GFP_REPEAT node=-1
  -            perf 27846 [001] 29643.445510: kmem:kmalloc: call_site=ffffffff81250642 ptr=0xffff88020fd6c300 bytes_req=96 bytes_alloc=96 gfp_flags=GFP_NOFS|GFP_ZERO
  +            perf 27846 [001] 29643.445510: kmem:kmalloc: (ext4_ext_find_extent+0x362) call_site=ffffffff81250642 ptr=0xffff88020fd6c300 bytes_req=96 bytes_alloc=96 gfp_flags=GFP_NOFS|GFP_ZERO
  -               X   888 [002] 29643.445546: kmem:kmalloc_node: call_site=ffffffff8153c67e ptr=0xffff880103828e00 bytes_req=384 bytes_alloc=512 gfp_flags=GFP_KERNEL|GFP_NOWARN|GFP_REPEAT|GFP_NOMEMALLOC node=-1
  +               X   888 [002] 29643.445546: kmem:kmalloc_node: (__alloc_skb+0x7e) call_site=ffffffff8153c67e ptr=0xffff880103828e00 bytes_req=384 bytes_alloc=512 gfp_flags=GFP_KERNEL|GFP_NOWARN|GFP_REPEAT|GFP_NOMEMALLOC node=-1

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1386076182-14484-15-git-send-email-jolsa@redhat.com


Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent d9d13f8b

tools/lib/traceevent/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -214,6 +214,7 @@ PEVENT_LIB_OBJS += kbuffer-parse.o

		PLUGIN_OBJS = plugin_jbd2.o
		PLUGIN_OBJS += plugin_hrtimer.o
		PLUGIN_OBJS += plugin_kmem.o

		PLUGINS := $(PLUGIN_OBJS:.o=.so)

tools/lib/traceevent/plugin_kmem.c

0 → 100644

+72 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
		*
		* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
		* This program is free software; you can redistribute it and/or
		* modify it under the terms of the GNU Lesser General Public
		* License as published by the Free Software Foundation;
		* version 2.1 of the License (not later!)
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU Lesser General Public License for more details.
		*
		* You should have received a copy of the GNU Lesser General Public
		* License along with this program; if not, see <http://www.gnu.org/licenses>
		*
		* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
		*/
		#include <stdio.h>
		#include <stdlib.h>
		#include <string.h>

		#include "event-parse.h"

		static int call_site_handler(struct trace_seq s, struct pevent_record record,
		struct event_format event, void context)
		{
		struct format_field *field;
		unsigned long long val, addr;
		void *data = record->data;
		const char *func;

		field = pevent_find_field(event, "call_site");
		if (!field)
		return 1;

		if (pevent_read_number_field(field, data, &val))
		return 1;

		func = pevent_find_function(event->pevent, val);
		if (!func)
		return 1;

		addr = pevent_find_function_address(event->pevent, val);

		trace_seq_printf(s, "(%s+0x%x) ", func, (int)(val - addr));
		return 1;
		}

		int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
		{
		pevent_register_event_handler(pevent, -1, "kmem", "kfree",
		call_site_handler, NULL);

		pevent_register_event_handler(pevent, -1, "kmem", "kmalloc",
		call_site_handler, NULL);

		pevent_register_event_handler(pevent, -1, "kmem", "kmalloc_node",
		call_site_handler, NULL);

		pevent_register_event_handler(pevent, -1, "kmem", "kmem_cache_alloc",
		call_site_handler, NULL);

		pevent_register_event_handler(pevent, -1, "kmem",
		"kmem_cache_alloc_node",
		call_site_handler, NULL);

		pevent_register_event_handler(pevent, -1, "kmem", "kmem_cache_free",
		call_site_handler, NULL);
		return 0;
		}