Home > mailing lists

Re: spinlocks on powerpc - Mailing list pgsql-hackers

From	Manabu Ori
Subject	Re: spinlocks on powerpc
Date	January 2, 2012 16:10:51
Msg-id	CADWW1HGMPf2+21JkU7AXcXEYhY8ASZW8E=B1JwPnRb5-5MzJSg@mail.gmail.com Whole thread Raw
In response to	Re: spinlocks on powerpc (Tom Lane <tgl@sss.pgh.pa.us>)
List	pgsql-hackers

By the way...

2012/1/2 Tom Lane <tgl@sss.pgh.pa.us>

> (It's depressing that these numbers have hardly moved since August ---

> at least on this test, the work that Robert's done has not made any

> difference.)

I merged some results and created another graph.

Please find an attached png file and you'll see obvious

performance improvement...

All the results are run on the same system:

Power 750 (32 physical cores, virtually 128 cores using SMT4)

mem: 256GB

OS: RHEL6.1 kernel 2.6.32-131.0.15.el6.ppc64

gcc version 4.4.5 20110214 (Red Hat 4.4.5-6)

From: Simon Riggs
Date: 02 January 2012, 16:09:41
Subject: Re: ALTER TABLE lock strength reduction patch is unsafe

From: Tom Lane
Date: 02 January 2012, 16:17:53
Subject: Re: ALTER TABLE lock strength reduction patch is unsafe