Re: Performance Events hangs with Intel P4 system

Jaswinder Singh Rajput
2010-05-14T04:25:18Z

Hello Cyrill,

On Fri, May 14, 2010 at 8:49 AM, Cyrill Gorcunov <gorcunov@gmail.com> wrote:
> On Friday, May 14, 2010, Jaswinder Singh Rajput
> <jaswinderlinux@gmail.com> wrote:
>> Hello,
>>
>> I am testing Performance Events on P4 with HT:
>>
>> [    0.002243] Performance Events: Netburst events, Netburst P4/Xeon PMU driver.
>> [    0.002432] ... version:                0
>> [    0.002545] ... bit width:              40
>> [    0.002659] ... generic registers:      18
>> [    0.002772] ... value mask:             000000ffffffffff
>> [    0.002887] ... max period:             0000007fffffffff
>> [    0.003004] ... fixed-purpose events:   0
>> [    0.003118] ... event mask:             000000000003ffff
>>
>> dmesg : http://userweb.kernel.org/~jaswinder/P4_HT/dmesg-2634-rc7-tip.txt
>> config : http://userweb.kernel.org/~jaswinder/P4_HT/config-2634-rc7-tip.txt
>>
>> [jaswinder@ht perf]$ ./perf stat -e cycles ls > /dev/null
>>
>>  Performance counter stats for 'ls':
>>
>>   <not counted>  cycles
>>
>>     0.003447053  seconds time elapsed
>>
>> [jaswinder@ht perf]$ ./perf stat -e cycles,instructions ls > /dev/null
>>
>>  Performance counter stats for 'ls':
>>
>>   <not counted>  cycles
>>         1862188  instructions             #      0.000 IPC    (scaled
>> from 54.91%)
>>
>>     0.003419230  seconds time elapsed
>>
>> [jaswinder@ht perf]$ ./perf stat -e
>> cycles,instructions,cache-references ls > /dev/null
>>
>> <<this dumps on screen and hangs the systems>>
>>
>> How can I fix this problem.
>>
>> Thanks,
>> --
>> Jaswinder Singh.
>>
>
> thanks for testing. Is there any issue in dmesg for first two perf
> calls before it hangs?

There is no issue in dmesg for first two perf calls.

> And is there a chance for screen dump (photo or
> netconsole)?
>

Here is netconsole :

[jaswinder@ht perf]$ ./perf stat -e
cycles,instructions,cache-references ls > /dev/null

Message from syslogd@ht at May 14 09:39:32 ...
kernel:[ 314.908284] general protection fault: 0000 [#1] PREEMPT SMP

Message from syslogd@ht at May 14 09:39:32 ...
kernel:[ 314.908296] last sysfs file:
/sys/class/net/eth1/statistics/collisions

Message from syslogd@ht at May 14 09:39:32 ...
kernel:[ 314.908346] Process ls (pid: 2726, ti=edac2000
task=ed9eb240 task.ti=edac2000)

Message from syslogd@ht at May 14 09:39:32 ...
kernel:[ 314.908349] Stack:

Message from syslogd@ht at May 14 09:39:32 ...
kernel:[ 314.908387] Call Trace:

Message from syslogd@ht at May 14 09:39:32 ...
kernel:[ 314.908549] Code: cb 89 d1 e8 89 c7 13 00 8b 75 dc 8b 45 e4
8b 55 d0 23 15 68 37 58 c1 8b b6 c4 00 00 00 01 75 f0 f7 d8 8b 4d f0
23 05 64 37 58 c1 <0f> 30 8b 45 dc e8 a4 63 06 00 8b 45 ec 83 c4 30 5b
5e 5f 5d c3

Message from syslogd@ht at May 14 09:39:32 ...
kernel:[ 314.908612] EIP: [<c100ccca>]
x86_perf_event_set_period+0x19d/0x1b2 SS:ESP 0068:edac3d70

If you need more information, please let me know.

Thanks,
--

Jaswinder Singh.