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From: Martin Peres <martin.peres-GANU6spQydw@public.gmane.org>
To: Lucas Stach <dev-8ppwABl0HbeELgA04lAiVw@public.gmane.org>
Cc: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: Re: "enable ctxprog xfer only when we need it to save power" introduces big performance regression
Date: Tue, 17 Jan 2012 22:17:38 +0100	[thread overview]
Message-ID: <4F15E572.5020003@free.fr> (raw)
In-Reply-To: <1326833749.1536.11.camel@tellur>

Le 17/01/2012 21:55, Lucas Stach a écrit :
> Isn't it possible that the performance regression seen with xfer 
> disabled by default is caused by slow memory clock speed? Martin, you 
> saw only a 1% performance drop on your 8600 which is running with full 
> speed by default. Marcins nv92 is likely running at a much lower clock 
> speed. It would be nice to know if the perf regression is still as big 
> when running with full speed. We could stop caring about this when the 
> perf regression is not observable in the highest perf level.
Well, actually, the performance hit should be higher when running at a 
highest memory clock since we context switch more often (there is no 
logic here, just a personal experience).

Anyway, I tried again last week end at every possible speed and I 
haven't been able to spot any performance hit *at all*.
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      reply	other threads:[~2012-01-17 21:17 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-29 17:08 "enable ctxprog xfer only when we need it to save power" introduces big performance regression Marcin Slusarz
     [not found] ` <20111029170801.GA3219-OI9uyE9O0yo@public.gmane.org>
2011-10-29 17:29   ` Marcin Slusarz
     [not found]     ` <20111029172923.GA3110-OI9uyE9O0yo@public.gmane.org>
2011-10-29 18:00       ` Maarten Maathuis
     [not found]         ` <CAGZ4FETt6QzMkxrMQwJsszjuQq0wdt85ujRZbxkdurkduaHh2A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-10-30  1:15           ` Ben Skeggs
2011-10-29 19:09       ` Marcin Slusarz
     [not found]         ` <20111029190938.GA3105-OI9uyE9O0yo@public.gmane.org>
2011-10-30  0:25           ` Maxim Levitsky
2011-10-30 10:33             ` Marcin Slusarz
     [not found]               ` <20111030103349.GA3157-OI9uyE9O0yo@public.gmane.org>
2011-10-30 10:37                 ` Marcin Kościelnicki
2011-11-09 22:10           ` Marcin Slusarz
     [not found]             ` <20111109221009.GD3402-OI9uyE9O0yo@public.gmane.org>
2011-11-10  7:10               ` Martin Peres
     [not found]                 ` <4EBB78F4.2020902-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org>
2011-12-28 21:39                   ` Marcin Slusarz
     [not found]                     ` <20111228213902.GA4275-OI9uyE9O0yo@public.gmane.org>
2011-12-28 23:58                       ` Martin Peres
     [not found]                         ` <4EFBAD2B.8080207-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org>
2011-12-29  1:38                           ` Marcin Slusarz
     [not found]                             ` <20111229013850.GA4076-OI9uyE9O0yo@public.gmane.org>
2012-01-13 21:26                               ` Martin Peres
     [not found]                                 ` <4F10A18E.1030908-GANU6spQydw@public.gmane.org>
2012-01-17 20:55                                   ` Lucas Stach
2012-01-17 21:17                                     ` Martin Peres [this message]

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