On Thu, Mar 1, 2012 at 6:48 PM, Dmitry Antipov
<[email protected]> wrote:
> On 02/28/2012 05:27 PM, Ming Lei wrote:
>
>> I am sure that several guys have tried the current omap4 pmu patch
>> and make perf work well on pandaboard.
>
>
> On a freshly booted panda board which is mostly idle:
The following are all tracepoint events, and the arm a9 pmu is not
involved with them.
>
> root@linaro-developer:~# uptime
> 14:44:36 up 1 min, 3 users, load average: 0.17, 0.11, 0.05
> root@linaro-developer:~# perf stat -a `perf list | grep kmem | awk '{printf
> ("-e %s ", $1)}'` sleep 1
It is OK by 'perf stat -a -e kmem:* sleep 1'
>
> Performance counter stats for 'sleep 1':
>
> 55 kmem:kmalloc
> [99.99%]
> 143 kmem:kmem_cache_alloc
> [99.99%]
> 0 kmem:kmalloc_node
> [99.99%]
> 0 kmem:kmem_cache_alloc_node
> [99.99%]
> 29 kmem:kfree
> [99.99%]
> 301 kmem:kmem_cache_free
> [100.00%]
> 45 kmem:mm_page_free
> [100.00%]
> 32 kmem:mm_page_free_batched
> [100.00%]
> 35 kmem:mm_page_alloc
> [100.00%]
> 1 kmem:mm_page_alloc_zone_locked
> [100.00%]
> 0 kmem:mm_page_pcpu_drain
> [100.00%]
> 0 kmem:mm_page_alloc_extfrag
>
> 1.022554950 seconds time elapsed
>
> root@linaro-developer:~# perf stat -a `perf list | grep sched | awk '{printf
> ("-e %s ", $1)}'` sleep 1
>
> Performance counter stats for 'sleep 1':
>
> 0 sched:sched_kthread_stop
> [99.98%]
> 0 sched:sched_kthread_stop_ret
> [99.98%]
> 12 sched:sched_wakeup
> [99.98%]
> 0 sched:sched_wakeup_new
> [99.99%]
> 26 sched:sched_switch
> [99.99%]
> 0 sched:sched_migrate_task
> [99.99%]
> 1 sched:sched_process_free
> [99.99%]
> 1 sched:sched_process_exit
> [99.99%]
> 0 sched:sched_wait_task
> [99.99%]
> 1 sched:sched_process_wait
> [99.99%]
> 0 sched:sched_process_fork
> [99.99%]
> 4867991 sched:sched_stat_wait
> [100.00%]
> 10864556009 sched:sched_stat_sleep
> [100.00%]
> 0 sched:sched_stat_iowait
> [100.00%]
> 940098109 sched:sched_stat_blocked
> [100.00%]
> 243187241 sched:sched_stat_runtime
> [100.00%]
> 0 sched:sched_pi_setprio
>
> 1.068707582 seconds time elapsed
>
> No objections for kmem counters, but I'm pretty sure that some sched
> counters are bogus.
Maybe you can verify these counters via ftrace interface, but I bet you can
get same result.
thanks
--
Ming Lei
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