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01-16-2008, 07:08 PM
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 Running PA-RISC executables on Itanium Hi all, I am trying to run multi-thread application built on HP-UX 11.11 (PA) on Itanium machine (HP-UX 11.22i) When configured to operate in single thread it runs ok (although not as fast as we expected). When changing configuration to multi-threaded mode huge performance degradation occures (10-15 times!!). It doesn't matter if we change thread_scope from PTHREAD_SCOPE_PROCESS to PTHREAD_SCOPE_SYSTEM , policy from SCHED_TIMESHARE to SCHED_OTHER or detachstate from PTHREAD_CREATE_JOINABLE to PTHREAD_CREATE_DETACHED. Does anyone have an idea how this can be fixed/tuned ? Thanks and best regards, Evgeny      |
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01-16-2008, 07:08 PM
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| Re: Running PA-RISC executables on Itanium In article <1115203732.097420.23140@z14g2000cwz.googlegroups. com>, EvgK wrote: > Hi all, > > I am trying to run multi-thread application built on HP-UX 11.11 (PA) > on Itanium machine (HP-UX 11.22i) > When configured to operate in single thread it runs ok (although not as > fast as we expected). > When changing configuration to multi-threaded mode huge performance > degradation occures (10-15 times!!). > > It doesn't matter if we change thread_scope from PTHREAD_SCOPE_PROCESS > to PTHREAD_SCOPE_SYSTEM , > policy from SCHED_TIMESHARE to SCHED_OTHER > or detachstate from PTHREAD_CREATE_JOINABLE to PTHREAD_CREATE_DETACHED. > > Does anyone have an idea how this can be fixed/tuned ? Not that it solves your problem, but isn't it generally recommended to be running 11.23 on Itanium systems? 11.22 is not really being patched that I have seen... Kevin -- Unix Guy Consulting, LLC Unix and Linux Automation, Shell, Perl and CGI scripting http://www.unix-guy.com |
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01-16-2008, 07:08 PM
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| Re: Running PA-RISC executables on Itanium Do you have much in the way of mutex contention in your threaded application? It might be interesting to compare a tusc trace of the application running under PA-RISC with a tusc trace of the same application running under the Aries emulator on IPF. I suppose that the usual song and dance about making sure you have the latest versions of Aries intalled would apply, even if you are already on 11.23. rick jones -- Wisdom Teeth are impacted, people are affected by the effects of events. these opinions are mine, all mine; HP might not want them anyway...  feel free to post, OR email to raj in cup.hp.com but NOT BOTH... |
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