| From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
|---|---|
| To: | Florian Pflug <fgp(at)phlo(dot)org> |
| Cc: | "P(dot) Caillaud" <peufeu(at)peufeu(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: LLVM / clang |
| Date: | 2010-06-10 08:49:33 |
| Message-ID: | 1276159773.32193.2.camel@fsopti579.F-Secure.com |
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| Thread: | |
| Lists: | pgsql-hackers |
On ons, 2010-06-09 at 09:59 +0200, Florian Pflug wrote:
> The most heavily platform dependent part of the code is the spinlock
> implementation. You might want to check that it actually uses the
> version optimized for your platform, not the (much slower) generic
> implementation based on semaphores.
You only get the slow implementation if you configure explicitly with
--disable-spinlocks. A toolchain that didn't support spinlocks would
fail the build and then the user could use that option to get past that
problem.
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