Re: Issue perf attaching to processes creating many short-live threads

On 10/23/2015 02:56 PM, David Ahern wrote:
> On 10/23/15 12:52 PM, William Cohen wrote:
>> Earlier this month Rei Odeira found that the oprofile tool operf would
>> have problems attaching and monitoring a process that created many
>> very short-lived threads.  It looks like the kernel's perf tool also
>> has issues when attempting to attach and monitor a process that is
>> creating many short-lived threads.
> 
> known a problem. If this is the problem I think it is you will find that strace shows perf stuck walking /proc directory.
> 
> David
> 

Hi David,

Is the following thread related to the problem?

[PATCH 1/1] perf,tools: add time out to force stop endless mmap processing" 
 http://lkml.iu.edu/hypermail/linux/kernel/1506.1/02251.html 

Or is there some other thread about the problem?

-Will

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