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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-06 12:30:52 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-06 12:30:52 -0400 |
commit | 4aed2fd8e3181fea7c09ba79cf64e7e3f4413bf9 (patch) | |
tree | 1f69733e5daab4915a76a41de0e4d1dc61e12cfb /Documentation/ABI/testing | |
parent | 3a3527b6461b1298cc53ce72f336346739297ac8 (diff) | |
parent | fc9ea5a1e53ee54f681e226d735008e2a6f8f470 (diff) |
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (162 commits)
tracing/kprobes: unregister_trace_probe needs to be called under mutex
perf: expose event__process function
perf events: Fix mmap offset determination
perf, powerpc: fsl_emb: Restore setting perf_sample_data.period
perf, powerpc: Convert the FSL driver to use local64_t
perf tools: Don't keep unreferenced maps when unmaps are detected
perf session: Invalidate last_match when removing threads from rb_tree
perf session: Free the ref_reloc_sym memory at the right place
x86,mmiotrace: Add support for tracing STOS instruction
perf, sched migration: Librarize task states and event headers helpers
perf, sched migration: Librarize the GUI class
perf, sched migration: Make the GUI class client agnostic
perf, sched migration: Make it vertically scrollable
perf, sched migration: Parameterize cpu height and spacing
perf, sched migration: Fix key bindings
perf, sched migration: Ignore unhandled task states
perf, sched migration: Handle ignored migrate out events
perf: New migration tool overview
tracing: Drop cpparg() macro
perf: Use tracepoint_synchronize_unregister() to flush any pending tracepoint call
...
Fix up trivial conflicts in Makefile and drivers/cpufreq/cpufreq.c
Diffstat (limited to 'Documentation/ABI/testing')
-rw-r--r-- | Documentation/ABI/testing/debugfs-kmemtrace | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/Documentation/ABI/testing/debugfs-kmemtrace b/Documentation/ABI/testing/debugfs-kmemtrace deleted file mode 100644 index 5e6a92a02d85..000000000000 --- a/Documentation/ABI/testing/debugfs-kmemtrace +++ /dev/null | |||
@@ -1,71 +0,0 @@ | |||
1 | What: /sys/kernel/debug/kmemtrace/ | ||
2 | Date: July 2008 | ||
3 | Contact: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> | ||
4 | Description: | ||
5 | |||
6 | In kmemtrace-enabled kernels, the following files are created: | ||
7 | |||
8 | /sys/kernel/debug/kmemtrace/ | ||
9 | cpu<n> (0400) Per-CPU tracing data, see below. (binary) | ||
10 | total_overruns (0400) Total number of bytes which were dropped from | ||
11 | cpu<n> files because of full buffer condition, | ||
12 | non-binary. (text) | ||
13 | abi_version (0400) Kernel's kmemtrace ABI version. (text) | ||
14 | |||
15 | Each per-CPU file should be read according to the relay interface. That is, | ||
16 | the reader should set affinity to that specific CPU and, as currently done by | ||
17 | the userspace application (though there are other methods), use poll() with | ||
18 | an infinite timeout before every read(). Otherwise, erroneous data may be | ||
19 | read. The binary data has the following _core_ format: | ||
20 | |||
21 | Event ID (1 byte) Unsigned integer, one of: | ||
22 | 0 - represents an allocation (KMEMTRACE_EVENT_ALLOC) | ||
23 | 1 - represents a freeing of previously allocated memory | ||
24 | (KMEMTRACE_EVENT_FREE) | ||
25 | Type ID (1 byte) Unsigned integer, one of: | ||
26 | 0 - this is a kmalloc() / kfree() | ||
27 | 1 - this is a kmem_cache_alloc() / kmem_cache_free() | ||
28 | 2 - this is a __get_free_pages() et al. | ||
29 | Event size (2 bytes) Unsigned integer representing the | ||
30 | size of this event. Used to extend | ||
31 | kmemtrace. Discard the bytes you | ||
32 | don't know about. | ||
33 | Sequence number (4 bytes) Signed integer used to reorder data | ||
34 | logged on SMP machines. Wraparound | ||
35 | must be taken into account, although | ||
36 | it is unlikely. | ||
37 | Caller address (8 bytes) Return address to the caller. | ||
38 | Pointer to mem (8 bytes) Pointer to target memory area. Can be | ||
39 | NULL, but not all such calls might be | ||
40 | recorded. | ||
41 | |||
42 | In case of KMEMTRACE_EVENT_ALLOC events, the next fields follow: | ||
43 | |||
44 | Requested bytes (8 bytes) Total number of requested bytes, | ||
45 | unsigned, must not be zero. | ||
46 | Allocated bytes (8 bytes) Total number of actually allocated | ||
47 | bytes, unsigned, must not be lower | ||
48 | than requested bytes. | ||
49 | Requested flags (4 bytes) GFP flags supplied by the caller. | ||
50 | Target CPU (4 bytes) Signed integer, valid for event id 1. | ||
51 | If equal to -1, target CPU is the same | ||
52 | as origin CPU, but the reverse might | ||
53 | not be true. | ||
54 | |||
55 | The data is made available in the same endianness the machine has. | ||
56 | |||
57 | Other event ids and type ids may be defined and added. Other fields may be | ||
58 | added by increasing event size, but see below for details. | ||
59 | Every modification to the ABI, including new id definitions, are followed | ||
60 | by bumping the ABI version by one. | ||
61 | |||
62 | Adding new data to the packet (features) is done at the end of the mandatory | ||
63 | data: | ||
64 | Feature size (2 byte) | ||
65 | Feature ID (1 byte) | ||
66 | Feature data (Feature size - 3 bytes) | ||
67 | |||
68 | |||
69 | Users: | ||
70 | kmemtrace-user - git://repo.or.cz/kmemtrace-user.git | ||
71 | |||