Messages in this thread | | | From | Thomas Renninger <> | Subject | Re: [PATCH] cpu-freq: add troubleshooting section for FSB changes | Date | Sat, 7 Nov 2009 23:47:04 +0100 |
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On Saturday 07 November 2009 11:28:12 pm Arjan van de Ven wrote: > Thomas Renninger wrote: > > > On Friday 06 November 2009 09:01:00 pm Luis R. Rodriguez wrote: > >> With cpu frequency scaling you may run into some system > >> performance issues when the FSB changes speed due to the > >> throughput constraints this brings on the system. > > > > Interesting. > > Could you be a bit more detailed how and what kind of perfomance issues > > are seen, please. > > I expect IO based issues like WLAN package throughput or even lost > > connections :) > > the bus doesn't get THAT slow..... I expected wireless problems because 5 people with @atheros.com are in CC. There is zero information about the problem itself and possibly affected devices/machines. > in addition, most FSB systems have the memory controller in the chipset, > next to the PCI logic... so that the FSB bus for DMA transactions only > carries the snoop traffic, not the whole data. So when should people look at this?
Thomas
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