| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Mark Cave-Ayland <mark(dot)cave-ayland(at)ilande(dot)co(dot)uk>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Spinlocks and compiler/memory barriers |
| Date: | 2014-07-02 00:21:37 |
| Message-ID: | 14348.1404260497@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On 2014-07-01 23:21:07 +0100, Mark Cave-Ayland wrote:
>> Also if you're struggling for Sun buildfarm animals, recent versions of QEMU
>> will quite happily install and run later versions of 32-bit Solaris over
>> serial, and 2.0 even manages to give you a cgthree framebuffer for the full
>> experience.
> Well. I have to admit I'm really not interested in investing that much
> time in something I've no stake in. If postgres developers have to put
> emulated machines to develop features something imo went seriously
> wrong. That's more effort than at least I'm willing to spend.
Perhaps more to the point, I have no faith at all that an emulator will
mimic multiprocessor timing behavior to the level of detail needed to
tell whether memory-barrier-related logic works. See the VAX discussion
just a couple days ago.
regards, tom lane
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