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RE: probe timer.profile registration error
As I stated, I was expecting "my" root-cause to fail earlier in the first passes. This is confirmed by your check and experts seem to have found right issue.. Good !
Regards
Fred
OMAP Platform Business Unit - System Platform Engineering - Platform & Product Entitlement
>
Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. 036 420 040 R.C.S Antibes. Capital de EUR 12.654.784
-----Original Message-----
>From: Wenhua Zhang [mailto:shiziwen@gmail.com]
>Sent: Sunday, October 21, 2012 8:26 AM
>To: Turgis, Frederic
>Cc: systemtap@sourceware.org
>Subject: Re: probe timer.profile registration error
>
>Hi，
>Thanks for your reply, and I have checked the config file when I build
>the kernel, I found "CONFIG_PROFILING=y".
>And when I try again, the error not exists.
>So I think it is not the reason.
>May be as Frank Ch. Eigler said:
>"The timer.profile probe, in many kernel versions, is a
>single-concurrent-user-only facility. If there is already another
>systemtap script or some other kernel user of the profiling timer
>interrupt, then subsequent ones get the -EBUSY (-16) error."
>
>I will check it.
>
>Thanks,
>
>Best Wishes,
>Wenhua
>
>2012/10/21 Turgis, Frederic <f-turgis@ti.com>:
>> I think you would have had an error in previous pass but you could check that you have
>CONFIG_PROFILING enabled so that register_timer_hook() is defined in kernel. "probe timer.profile"
>relies on this function.
>>
>> Regards
>> Fred
>>
>> OMAP Platform Business Unit - System Platform Engineering - Platform & Product Entitlement
>>
>>
>>>
>> Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. 036 420 040 R.C.S
>Antibes. Capital de EUR 12.654.784
>>
>> -----Original Message-----
>>>From: systemtap-owner@sourceware.org [mailto:systemtap-owner@sourceware.org] On Behalf Of Wenhua
>Zhang
>>>Sent: Saturday, October 20, 2012 6:00 AM
>>>To: systemtap@sourceware.org
>>>Subject: probe timer.profile registration error
>>>
>>>Hi ，
>>>When I run the stap command as below,
>>>
>>> /opt/systemtap/bin/stap --ldd -d /usr/local/nginx/sbin/nginx
>>> --all-modules -D MAXMAPENTRIES=5120 -D MAXACTION=20000 -D
>>> MAXTRACE=50 -D MAXSTRINGLEN=1024 -D MAXBACKTRACE=100 -x 25017 a.stp
>>> --vp 00001 > a.out
>>>
>>>There is an error:
>>> WARNING: missing unwind/symbol data for module
>>> 'stap_97bdcbebec34bca89d728c7b361aa64_24788'
>>> WARNING: missing unwind/symbol data for module 'uprobes'
>>> Pass 5: starting run.
>>> ERROR: probe timer.profile registration error (rc -16)
>>>
>>> The stap file as:
>>>global s;
>>> global quit = 0;
>>>
>>> probe timer.profile {
>>> if (pid() == target()) {
>>> if (quit) {
>>> foreach (i in s-) {
>>> print_ustack(i);
>>> printf("\t%d\n", @count(s[i]));
>>> }
>>> exit()
>>> } else {
>>> s[ubacktrace()] <<< 1;
>>> }
>>> }
>>> }
>>>
>>> probe timer.s(20) {
>>> quit = 1
>>> }
>>>
>>>Can you help me find what happened and what should I do to resolve it?
>>>Thanks very much.
>>>
>>>Best Wishes,
>>>Wenhua
>>