Re: spinlocks on HP-UX

From: Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Tatsuo Ishii <ishii(at)postgresql(dot)org>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: spinlocks on HP-UX
Date: 2011-10-18 06:20:31
Message-ID: CABOikdPv=KaNk=8zd24EJgcOOFzgiNXP02oAWHnzCw_idb69cw@mail.gmail.com
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On Tue, Oct 18, 2011 at 10:04 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:

> Hmm, so you added the non-locked test in TAS()?  Did you try adding it
> just to TAS_SPIN()?  On Itanium, I found that it was slightly better
> to do it only in TAS_SPIN() - i.e. in the contended case.
>

Would it be a good change for S_LOCK() to use TAS_SPIN() as well ?

Thanks,
Pavan

--
Pavan Deolasee
EnterpriseDB     http://www.enterprisedb.com

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