perf 工具介绍1

https://perf.wiki.kernel.org/index.php/Tutorial

http://os.51cto.com/art/201105/265133.htm

在LINUX 源代码中安装perf

[root@localhost perf]# pwd
/usr/src/kernels/linux-2.6.32/tools/perf

[root@localhost perf]# yum install binutils-devel

[root@localhost perf]# make

[root@localhost perf]# make install
install -d -m 755 '/root/bin'
install perf '/root/bin'

[root@localhost perf]# mount   -t  debugfs none  /sys/kernel/debug/

[root@localhost perf]# perf list

List of pre-defined events (to be used in -e):

  cpu-cycles OR cycles                       [Hardware event]
  instructions                               [Hardware event]
  cache-references                           [Hardware event]
  cache-misses                               [Hardware event]
  branch-instructions OR branches            [Hardware event]
  branch-misses                              [Hardware event]
  bus-cycles                                 [Hardware event]

  cpu-clock                                  [Software event]
  task-clock                                 [Software event]
  page-faults OR faults                      [Software event]
  minor-faults                               [Software event]
  major-faults                               [Software event]
  context-switches OR cs                     [Software event]
  cpu-migrations OR migrations               [Software event]

  L1-dcache-loads                            [Hardware cache event]
  L1-dcache-load-misses                      [Hardware cache event]
  L1-dcache-stores                           [Hardware cache event]
  L1-dcache-store-misses                     [Hardware cache event]
  L1-dcache-prefetches                       [Hardware cache event]
  L1-dcache-prefetch-misses                  [Hardware cache event]
  L1-icache-loads                            [Hardware cache event]
  L1-icache-load-misses                      [Hardware cache event]
  L1-icache-prefetches                       [Hardware cache event]
  L1-icache-prefetch-misses                  [Hardware cache event]
  LLC-loads                                  [Hardware cache event]
  LLC-load-misses                            [Hardware cache event]
  LLC-stores                                 [Hardware cache event]
  LLC-store-misses                           [Hardware cache event]
  LLC-prefetches                             [Hardware cache event]
  LLC-prefetch-misses                        [Hardware cache event]
  dTLB-loads                                 [Hardware cache event]
  dTLB-load-misses                           [Hardware cache event]
  dTLB-stores                                [Hardware cache event]
  dTLB-store-misses                          [Hardware cache event]
  dTLB-prefetches                            [Hardware cache event]
  dTLB-prefetch-misses                       [Hardware cache event]
  iTLB-loads                                 [Hardware cache event]
  iTLB-load-misses                           [Hardware cache event]
  branch-loads                               [Hardware cache event]
  branch-load-misses                         [Hardware cache event]

  rNNN                                       [raw hardware event descriptor]

  skb:kfree_skb                              [Tracepoint event]
  skb:skb_copy_datagram_iovec                [Tracepoint event]
  block:block_rq_abort                       [Tracepoint event]
  block:block_rq_insert                      [Tracepoint event]
  block:block_rq_issue                       [Tracepoint event]
  block:block_rq_requeue                     [Tracepoint event]
  block:block_rq_complete                    [Tracepoint event]
  block:block_bio_bounce                     [Tracepoint event]
  block:block_bio_complete                   [Tracepoint event]
  block:block_bio_backmerge                  [Tracepoint event]
  block:block_bio_frontmerge                 [Tracepoint event]
  block:block_bio_queue                      [Tracepoint event]
  block:block_getrq                          [Tracepoint event]
  block:block_sleeprq                        [Tracepoint event]
  block:block_plug                           [Tracepoint event]
  block:block_unplug_timer                   [Tracepoint event]
  block:block_unplug_io                      [Tracepoint event]
  block:block_split                          [Tracepoint event]
  block:block_remap                          [Tracepoint event]
  block:block_rq_remap                       [Tracepoint event]
  kmem:kmalloc                               [Tracepoint event]
  kmem:kmem_cache_alloc                      [Tracepoint event]
  kmem:kmalloc_node                          [Tracepoint event]
  kmem:kmem_cache_alloc_node                 [Tracepoint event]
  kmem:kfree                                 [Tracepoint event]
  kmem:kmem_cache_free                       [Tracepoint event]
  kmem:mm_page_free_direct                   [Tracepoint event]
  kmem:mm_pagevec_free                       [Tracepoint event]
  kmem:mm_page_alloc                         [Tracepoint event]
  kmem:mm_page_alloc_zone_locked             [Tracepoint event]
  kmem:mm_page_pcpu_drain                    [Tracepoint event]
  kmem:mm_page_alloc_extfrag                 [Tracepoint event]
  power:power_start                          [Tracepoint event]
  power:power_end                            [Tracepoint event]
  power:power_frequency                      [Tracepoint event]
  module:module_load                         [Tracepoint event]
  module:module_free                         [Tracepoint event]
  module:module_get                          [Tracepoint event]
  module:module_put                          [Tracepoint event]
  module:module_request                      [Tracepoint event]
  workqueue:workqueue_insertion              [Tracepoint event]
  workqueue:workqueue_execution              [Tracepoint event]
  workqueue:workqueue_creation               [Tracepoint event]
  workqueue:workqueue_destruction            [Tracepoint event]
  timer:timer_init                           [Tracepoint event]
  timer:timer_start                          [Tracepoint event]
  timer:timer_expire_entry                   [Tracepoint event]
  timer:timer_expire_exit                    [Tracepoint event]
  timer:timer_cancel                         [Tracepoint event]
  timer:hrtimer_init                         [Tracepoint event]
  timer:hrtimer_start                        [Tracepoint event]
  timer:hrtimer_expire_entry                 [Tracepoint event]
  timer:hrtimer_expire_exit                  [Tracepoint event]
  timer:hrtimer_cancel                       [Tracepoint event]
  timer:itimer_state                         [Tracepoint event]
  timer:itimer_expire                        [Tracepoint event]
  irq:irq_handler_entry                      [Tracepoint event]
  irq:irq_handler_exit                       [Tracepoint event]
  irq:softirq_entry                          [Tracepoint event]
  irq:softirq_exit                           [Tracepoint event]
  sched:sched_kthread_stop                   [Tracepoint event]
  sched:sched_kthread_stop_ret               [Tracepoint event]
  sched:sched_wait_task                      [Tracepoint event]
  sched:sched_wakeup                         [Tracepoint event]
  sched:sched_wakeup_new                     [Tracepoint event]
  sched:sched_switch                         [Tracepoint event]
  sched:sched_migrate_task                   [Tracepoint event]
  sched:sched_process_free                   [Tracepoint event]
  sched:sched_process_exit                   [Tracepoint event]
  sched:sched_process_wait                   [Tracepoint event]
  sched:sched_process_fork                   [Tracepoint event]
  sched:sched_signal_send                    [Tracepoint event]
  sched:sched_stat_wait                      [Tracepoint event]
  sched:sched_stat_runtime                   [Tracepoint event]
  sched:sched_stat_sleep                     [Tracepoint event]
  sched:sched_stat_iowait                    [Tracepoint event]
  syscalls:sys_enter                         [Tracepoint event]
  syscalls:sys_exit                          [Tracepoint event]

[root@localhost perf]# perf --help

 usage: perf [--version] [--help] COMMAND [ARGS]

 The most commonly used perf commands are:
   annotate    Read perf.data (created by perf record) and display annotated code
   list        List all symbolic event types
   record      Run a command and record its profile into perf.data
   report      Read perf.data (created by perf record) and display the profile
   sched       Tool to trace/measure scheduler properties (latencies)
   stat        Run a command and gather performance counter statistics
   timechart   Tool to visualize total system behavior during a workload
   top         System profiling tool.
   trace       Read perf.data (created by perf record) and display trace output

 See 'perf help COMMAND' for more information on a specific command

usage: perf stat [<options>] <command>

    -e, --event <event>   event selector. use 'perf list' to list available events
    -i, --inherit         child tasks inherit counters
    -p, --pid <n>         stat events on existing pid
    -a, --all-cpus        system-wide collection from all CPUs
    -c, --scale           scale/normalize counters
    -v, --verbose         be more verbose (show counter open errors, etc)
    -r, --repeat <n>      repeat command and print average + stddev (max: 100)
    -n, --null            null run - dont start any counters

[root@localhost perf]# perf stat  dd if=/dev/zero of=/dev/null count= + records in
+ records out
 bytes ( MB) copied, 0.522033 seconds,  MB/s

 Performance counter stats for 'dd if=/dev/zero of=/dev/null count=1000000':

     514.982845  task-clock-msecs         #      0.978 CPUs
                context-switches         #      0.000 M/sec
                CPU-migrations           #      0.000 M/sec
              page-faults              #      0.000 M/sec
                cycles                   #      0.000 M/sec
                instructions             #      0.000 IPC
                cache-references         #      0.000 M/sec
                cache-misses             #      0.000 M/sec

    0.526756322  seconds time elapsed

[root@localhost perf]# perf stat -e r1a8 -a sleep 

 Performance counter stats for 'sleep 1':

                raw 0x1a8                #      0.000 M/sec

    1.003503666  seconds time elapsed

[root@localhost perf]# perf stat -r  sleep 

 Performance counter stats for 'sleep 1' ( runs):

       3.083876  task-clock-msecs         #      0.003 CPUs    ( +-  13.690% )
                context-switches         #      0.000 M/sec   ( +-   0.000% )
                CPU-migrations           #      0.000 M/sec   ( +-     nan% )
              page-faults              #      0.046 M/sec   ( +-   0.171% )
                cycles                   #      0.000 M/sec   ( +-     nan% )
                instructions             #      0.000 IPC     ( +-     nan% )
                cache-references         #      0.000 M/sec   ( +-     nan% )
                cache-misses             #      0.000 M/sec   ( +-     nan% )

    1.005166673  seconds time elapsed   ( +-   0.050% )