[dpdk-dev] [PATCH v2] eal: fix compile error for old glibc caused by pthread_setname_np()
Roger B. Melton
rmelton at cisco.com
Wed Nov 25 15:20:12 CET 2015
On 11/25/15 9:03 AM, Thomas Monjalon wrote:
> 2015-11-25 08:51, Roger B. Melton:
>> Have you thought about a way to set thread name when glibc < 2.12. I
>> also ran into the problem recently and played around with prctl()
>> (Linux) to set thread (process) name. e.g.
>>
>> ret = prctl(PR_SET_NAME,<thread_name>,0,0,0);
>>
>>
>> There are 2 issues I think:
>>
>> 1) The semantics are different than prthread_setname_np(). With
>> pthread_setname_np() a name can be assigned to any thread, with
>> prctl() the name is assigned to the active thread. That would mean
>> that rather than rte_eal_init(), rte_eal_intr_init() could not
>> assign thread names. Rather the threads would have to name themselves.
>>
>> 2) I think BSD lacks prctl(), but some (not all?) BSD
>> implementations have setproctitle() to do the same thing.
>>
>>
>> It might be too late for 2.2, but something to think about for the future.
> I don't think this feature is important enough to deal with old environments
> and to risk some complicated bugs.
> Do you think it deserves more tricks?
> .
>
I agree with you Thomas. While I am one of those living in an old
environment, I believe that the complications of the tricks out weight
the debug benefit. However there may be other in the community who have
a different view, so I thought I would at least suggest that there are
alternatives.
Thanks,
-Roger
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