Re: Fw: Fw: bad performance on irix

Dear Tom,

The evidence is from the Process Activity Recorder, an Irix utility
similar to strace the reports syscall usage. A number of semop's are performed
in the operation of backend. Luis can send you specifics. --Bob

Luis Alberto Amigo Navarro writes:
>
>
> ----- Original Message -----
> From: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
> To: "Luis Alberto Amigo Navarro" <lamigo(at)atc(dot)unican(dot)es>
> Cc: <pgsql-hackers(at)postgresql(dot)org>; "Robert E. Bruccoleri"
> <bruc(at)stone(dot)congenomics(dot)com>
> Sent: Monday, March 18, 2002 5:36 PM
> Subject: Re: Fw: [HACKERS] bad performance on irix
>
>
> > "Luis Alberto Amigo Navarro" <lamigo(at)atc(dot)unican(dot)es> forwards:
> > >> It's using the spinlocks
> > >> for some locks, but semaphores for others.
> >
> > That doesn't make any sense to me. For one thing, if HAS_TEST_AND_SET
> > is defined in the config header, the executable will just plain fail to
> > build if there's no tas implementation, because lmgr/spin.c won't be
> > compiled. And I sure don't see how some of the locks might be
> > implemented one way and some the other.
> >
> > Which ones do you think are being implemented as semaphores, and what's
> > your evidence?
> >
> > regards, tom lane
> >
> > ---------------------------(end of broadcast)---------------------------
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> >
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> >
>
>

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| Robert E. Bruccoleri, Ph.D. | email: bruc(at)acm(dot)org |
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