| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | "Dickson S(dot) Guedes" <listas(at)guedesoft(dot)net> |
| Cc: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | Re: Better LWLocks with compare-and-swap (9.4) |
| Date: | 2013-05-20 12:35:28 |
| Message-ID: | 20130520123528.GA6146@alap2.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
On 2013-05-20 09:31:15 -0300, Dickson S. Guedes wrote:
> Hum, I was supposing that I was doing something wrong but I'm getting
> the same result as before even using your test case and my results is
> still different from yours:
>
>
> + 71,27% postgres postgres [.] AtEOXact_Buffers
> + 7,67% postgres postgres [.] AtEOXact_CatCache
> + 6,30% postgres postgres [.] AllocSetCheck
> + 5,34% postgres libc-2.12.so [.] __mcount_internal
> + 2,14% postgres [kernel.kallsyms][k] activate_page
That looks like you have configured with --enable-cassert and probably
also --enable-profiling? The former will give completely distorted
performance results...
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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