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authorFrederic Weisbecker <fweisbec@gmail.com>2008-12-29 16:42:23 -0500
committerIngo Molnar <mingo@elte.hu>2008-12-30 03:36:13 -0500
commit36994e58a48fb8f9651c7dc845a6de298aba5bfc (patch)
treefac4b8a1c30560e91460651487f3a57ef7f2b5cc /include/linux/kmemtrace.h
parent7a51cffbd10886c0557677dd916c090097c691ef (diff)
tracing/kmemtrace: normalize the raw tracer event to the unified tracing API
Impact: new tracer plugin This patch adapts kmemtrace raw events tracing to the unified tracing API. To enable and use this tracer, just do the following: echo kmemtrace > /debugfs/tracing/current_tracer cat /debugfs/tracing/trace You will have the following output: # tracer: kmemtrace # # # ALLOC TYPE REQ GIVEN FLAGS POINTER NODE CALLER # FREE | | | | | | | | # | type_id 1 call_site 18446744071565527833 ptr 18446612134395152256 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 0 call_site 18446744071565636711 ptr 18446612134345164672 bytes_req 240 bytes_alloc 240 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 0 call_site 18446744071565636711 ptr 18446612134345164912 bytes_req 240 bytes_alloc 240 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 0 call_site 18446744071565636711 ptr 18446612134345165152 bytes_req 240 bytes_alloc 240 gfp_flags 208 node -1 type_id 0 call_site 18446744071566144042 ptr 18446612134346191680 bytes_req 1304 bytes_alloc 1312 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 That was to stay backward compatible with the format output produced in inux/tracepoint.h. This is the default ouput, but note that I tried something else. If you change an option: echo kmem_minimalistic > /debugfs/trace_options and then cat /debugfs/trace, you will have the following output: # tracer: kmemtrace # # # ALLOC TYPE REQ GIVEN FLAGS POINTER NODE CALLER # FREE | | | | | | | | # | - C 0xffff88007c088780 file_free_rcu + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname - C 0xffff88007cad6000 putname + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname + K 240 240 000000d0 0xffff8800790dc780 -1 d_alloc - C 0xffff88007cad6000 putname + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname + K 240 240 000000d0 0xffff8800790dc870 -1 d_alloc - C 0xffff88007cad6000 putname + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname + K 240 240 000000d0 0xffff8800790dc960 -1 d_alloc + K 1304 1312 000000d0 0xffff8800791d7340 -1 reiserfs_alloc_inode - C 0xffff88007cad6000 putname + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname - C 0xffff88007cad6000 putname + K 992 1000 000000d0 0xffff880079045b58 -1 alloc_inode + K 768 1024 000080d0 0xffff88007c096400 -1 alloc_pipe_info + K 240 240 000000d0 0xffff8800790dca50 -1 d_alloc + K 272 320 000080d0 0xffff88007c088780 -1 get_empty_filp + K 272 320 000080d0 0xffff88007c088000 -1 get_empty_filp Yeah I shall confess kmem_minimalistic should be: kmem_alternative. Whatever, I find it more readable but this a personal opinion of course. We can drop it if you want. On the ALLOC/FREE column, + means an allocation and - a free. On the type column, you have K = kmalloc, C = cache, P = page I would like the flags to be GFP_* strings but that would not be easy to not break the column with strings.... About the node...it seems to always be -1. I don't know why but that shouldn't be difficult to find. I moved linux/tracepoint.h to trace/tracepoint.h as well. I think that would be more easy to find the tracer headers if they are all in their common directory. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/kmemtrace.h')
-rw-r--r--include/linux/kmemtrace.h86
1 files changed, 0 insertions, 86 deletions
diff --git a/include/linux/kmemtrace.h b/include/linux/kmemtrace.h
deleted file mode 100644
index 5bea8ead6a6b..000000000000
--- a/include/linux/kmemtrace.h
+++ /dev/null
@@ -1,86 +0,0 @@
1/*
2 * Copyright (C) 2008 Eduard - Gabriel Munteanu
3 *
4 * This file is released under GPL version 2.
5 */
6
7#ifndef _LINUX_KMEMTRACE_H
8#define _LINUX_KMEMTRACE_H
9
10#ifdef __KERNEL__
11
12#include <linux/types.h>
13#include <linux/marker.h>
14
15enum kmemtrace_type_id {
16 KMEMTRACE_TYPE_KMALLOC = 0, /* kmalloc() or kfree(). */
17 KMEMTRACE_TYPE_CACHE, /* kmem_cache_*(). */
18 KMEMTRACE_TYPE_PAGES, /* __get_free_pages() and friends. */
19};
20
21#ifdef CONFIG_KMEMTRACE
22
23extern void kmemtrace_init(void);
24
25static inline void kmemtrace_mark_alloc_node(enum kmemtrace_type_id type_id,
26 unsigned long call_site,
27 const void *ptr,
28 size_t bytes_req,
29 size_t bytes_alloc,
30 gfp_t gfp_flags,
31 int node)
32{
33 trace_mark(kmemtrace_alloc, "type_id %d call_site %lu ptr %lu "
34 "bytes_req %lu bytes_alloc %lu gfp_flags %lu node %d",
35 type_id, call_site, (unsigned long) ptr,
36 (unsigned long) bytes_req, (unsigned long) bytes_alloc,
37 (unsigned long) gfp_flags, node);
38}
39
40static inline void kmemtrace_mark_free(enum kmemtrace_type_id type_id,
41 unsigned long call_site,
42 const void *ptr)
43{
44 trace_mark(kmemtrace_free, "type_id %d call_site %lu ptr %lu",
45 type_id, call_site, (unsigned long) ptr);
46}
47
48#else /* CONFIG_KMEMTRACE */
49
50static inline void kmemtrace_init(void)
51{
52}
53
54static inline void kmemtrace_mark_alloc_node(enum kmemtrace_type_id type_id,
55 unsigned long call_site,
56 const void *ptr,
57 size_t bytes_req,
58 size_t bytes_alloc,
59 gfp_t gfp_flags,
60 int node)
61{
62}
63
64static inline void kmemtrace_mark_free(enum kmemtrace_type_id type_id,
65 unsigned long call_site,
66 const void *ptr)
67{
68}
69
70#endif /* CONFIG_KMEMTRACE */
71
72static inline void kmemtrace_mark_alloc(enum kmemtrace_type_id type_id,
73 unsigned long call_site,
74 const void *ptr,
75 size_t bytes_req,
76 size_t bytes_alloc,
77 gfp_t gfp_flags)
78{
79 kmemtrace_mark_alloc_node(type_id, call_site, ptr,
80 bytes_req, bytes_alloc, gfp_flags, -1);
81}
82
83#endif /* __KERNEL__ */
84
85#endif /* _LINUX_KMEMTRACE_H */
86
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