NR_CPUS and NR_COUNTERS goes up quadratic ... 1024x4096 was far
too ambitious upper limit - go for 256x256 which is still plenty.

[ Impact: reduce perf tool memory consumption ]

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

c6eb13 increased stack usage such that perf-top now croaks on startup.

Take event_array and mmap_array off the stack to prevent segfault on boxen
with smallish ulimit -s setting.
Signed-off-by: NMike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

recent userspace (F11) seems to already include the
linux/unistd.h bits which means we cannot include the version
in the kernel sources due to the header guards being the same.

Ensure we include the kernel version first.
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <20090523163012.739756497@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

I tried to run with 300 active counters and the tools bailed out
because our limit was at 64. So increase the counter limit to 1024
and the CPU limit to 4096.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Provide perf top -F as alternative to -c.

[ Impact: new 'perf top' feature ]
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <20090515132018.707922166@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Before this change, if a long-running perf stat workload was Ctrl-C-ed,
the utility exited without displaying statistics.

After the change, the Ctrl-C gets propagated into the workload (and
causes its early exit there), but perf stat itself will still continue
to run and will display counter results.

This is useful to run open-ended workloads, let them run for
a while, then Ctrl-C them to get the stats.

[ Impact: extend perf stat with new functionality ]

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Allow specifying a pid instead of always fork+exec'ing a command.

Because the PERF_EVENT_COMM and PERF_EVENT_MMAP events happened before
we connected, we must synthesize them so that 'perf report' can get what
it needs.

[ Impact: add new command line option ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20090515015046.GA13664@ghostprotocols.net>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

There is a buffer overwrite problem in builtin-top.c line 526, When I
tried to use ./perf top command, it was giving memory corruption
problem.

[ Impact: fix 'perf top' crash ]

LKML-Reference: <3fee128b0905092313x608e65e0l7b1116d86914114f@mail.gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Signed-off-by: NIngo Molnar <mingo@elte.hu>

"perf record":
 - per task counter
 - inherit switch
 - nmi switch

"perf report":
 - userspace/kernel filter

"perf stat":
 - userspace/kernel filter
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090505155437.389163017@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

ctype.h crawled out of the bit bucket :)
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Avoid further confusion during development
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Neither process_options nor execvp take an const **char as argument.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

No change, move of duplicated stuff only.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

These files are generated during the build process. No need to have
them in the git repository.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Signed-off-by: NIngo Molnar <mingo@elte.hu>

Update the documentation to reflect the current state of affairs

[ Impact: documentation update ]
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090501102533.296727903@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Avoid perf-report barfing on 0-length data files.

[ Impact: fix perf-report SIGBUS ]
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090501102533.196245693@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Bail out early if a record has zero size - we have no chance to make
reliable progress in that case. Print out the offset where this happens,
and print the number of bytes we missed out on.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Turn on scaling display by default - this is less confusing.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Build it explicitly until it's a proper builtin command.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

The documentation about the perf-top build was outdated after
perfstat has been implemented. This updates it.

[ Impact: update documentation ]
Signed-off-by: NRobert Richter <robert.richter@amd.com>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1241002046-8832-30-git-send-email-robert.richter@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Mike Galbraith reported:

> marge:..Documentation/perf_counter # make
>     CC builtin-stat.o
> In file included from builtin-stat.c:71:
> /usr/include/ctype.h:102: error: expected expression before ‘]’ token

Remove the ctype.h include.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Clean up the top level directory a bit by moving all the helper libraries
to util/*.[ch].
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Remove Git leftovers from this area.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Signed-off-by: NIngo Molnar <mingo@elte.hu>

Hook up the 'perf version' built-in command.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Move perf-record.c into the perf suite of commands.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Add Documentation/perf-stat.txt and Documentation/perf-top.txt.

The template that was used for it: Documentation/git-add.txt from Git.

Fix up small bugs to make these help texts show up both in the 'perf'
common-command summary output screen, and on the individual help screens.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Lets use the Git framework of built-in commands.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Signed-off-by: NIngo Molnar <mingo@elte.hu>

First very raw version at having a central 'perf' command and
a list of subcommands:

  perf top
  perf stat
  perf record
  perf report
  ...

This is done by picking up Git's collection of utility functions,
and hacking them to build fine in this new environment.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

We'd like to have a similar user-space structure as Git has, for the
perfcounter tools - so copy in Git's toplevel makefile as-is.

We'll strip it down in subsequent commits to make it fit the
perfcounters code.

The Git version used: 66996ec: Sync with 1.6.2.4
Signed-off-by: NIngo Molnar <mingo@elte.hu>

It's handier than an <unknown> entry.
Also replace the kernel/user column with a more compact version:

  0.52              cc1  [k]  page_fault
  0.57               :0  [k]   _spin_lock
  0.59            :7506  [.]  <unknown>
  0.69               as  [.]  /usr/bin/as: <unknown>
  0.76              cc1  [.]  /lib64/libc-2.8.so: _int_free
  0.92              cc1  [k]  clear_page_c
  1.00            :7465  [.]  <unknown>
  1.43              cc1  [.]  /lib64/libc-2.8.so: memset
  1.86              cc1  [.]  /lib64/libc-2.8.so: _int_malloc
 70.33              cc1  [.]  /usr/libexec/gcc/x86_64-redhat-linux/4.3.2/cc1: <unknown>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

# perf-record make -j4 kernel/
 # perf-report | tail -15

  0.39              cc1 [kernel] lock_acquired
  0.42              cc1 [kernel] lock_acquire
  0.51              cc1 [ user ] /lib64/libc-2.8.90.so: _int_free
  0.51               as [kernel] clear_page_c
  0.53              cc1 [ user ] /lib64/libc-2.8.90.so: memcpy
  0.56              cc1 [ user ] /lib64/libc-2.8.90.so: _IO_vfprintf
  0.63              cc1 [kernel] lock_release
  0.67              cc1 [ user ] /lib64/libc-2.8.90.so: strlen
  0.68              cc1 [kernel] debug_smp_processor_id
  1.38              cc1 [ user ] /lib64/libc-2.8.90.so: _int_malloc
  1.55              cc1 [ user ] /lib64/libc-2.8.90.so: memset
  1.77              cc1 [kernel] __lock_acquire
  1.88              cc1 [kernel] clear_page_c
  3.61               as [ user ] /usr/bin/as: <unknown>
 59.16              cc1 [ user ] /usr/libexec/gcc/x86_64-redhat-linux/4.3.2/cc1: <unknown>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
LKML-Reference: <20090408130409.220518450@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Update kerneltop to use PERF_EVENT_MISC_OVERFLOW
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090408130408.947197470@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

```---------------------------------------------------------------------------
 KernelTop:   90551 irqs/sec  kernel:15.0% [NMI, 100000 CPU cycles],  (all, 4 CPUs)
```

---------------------------------------------------------------------------

             events    pcnt         RIP          kernel function
  ______     ______   _____   ________________   _______________

           16871.00 - 19.1% - ffffffff80328e20 : clear_page_c
            8810.00 -  9.9% - ffffffff8048ce80 : page_fault
            4746.00 -  5.4% - ffffffff8048cae2 : _spin_lock
            4428.00 -  5.0% - ffffffff80328e70 : copy_page_c
            3340.00 -  3.8% - ffffffff80329090 : copy_user_generic_string!
            2679.00 -  3.0% - ffffffff8028a16b : get_page_from_freelist
            2254.00 -  2.5% - ffffffff80296f19 : unmap_vmas
            2082.00 -  2.4% - ffffffff80297e19 : handle_mm_fault
            1754.00 -  2.0% - ffffffff80288dc8 : __rmqueue_smallest
            1553.00 -  1.8% - ffffffff8048ca58 : _spin_lock_irqsave
            1400.00 -  1.6% - ffffffff8028cdc8 : release_pages
            1337.00 -  1.5% - ffffffff80285400 : find_get_page
            1335.00 -  1.5% - ffffffff80225a23 : do_page_fault
            1299.00 -  1.5% - ffffffff802ba8e7 : __d_lookup
            1174.00 -  1.3% - ffffffff802b38f3 : __link_path_walk
            1155.00 -  1.3% - ffffffff802843e1 : perf_swcounter_ctx_event!
            1137.00 -  1.3% - ffffffff8028d118 : ____pagevec_lru_add
             963.00 -  1.1% - ffffffff802a670b : kmem_cache_alloc
             885.00 -  1.0% - ffffffff8024bc61 : __wake_up_bit

Display per function percentage along with event count.
Signed-off-by: NMike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Update to reflect the new record_type ABI changes.
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Orig-LKML-Reference: <20090402091319.407283141@chello.nl>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Decouple kerneltop display from event acquisition by introducing
a separate data acquisition thread. This fixes annnoying kerneltop
display refresh jitter and missed events.

Also add a -r <prio> option, to switch the data acquisition thread
to real-time priority.
Signed-off-by: NMike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Orig-LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>