________________________________________ > From: linux-ide-owner@xxxxxxxxxxxxxxx [linux-ide-owner@xxxxxxxxxxxxxxx] on behalf of Li Yang [leoli@xxxxxxxxxxxxx] > Sent: Friday, January 13, 2012 3:36 AM > To: Liu Qiang-B32616 > Cc: jgarzik@xxxxxxxxx; linux-ide@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linuxppc-dev@xxxxxxxxxxxxxxxx; Liu Qiang-B32616 > Subject: Re: [PATCH][SDK v1.2] sata: I/O load balancing > On Fri, Jan 13, 2012 at 4:25 PM, Qiang Liu <qiang.liu@xxxxxxxxxxxxx> wrote: > > From: Qiang Liu <b32616@xxxxxxxxxxxxx> > > > > Reduce interrupt singnals through reset Interrupt Coalescing Control Reg. > > Increase the threshold value of interrupt and timer will reduce the number > > of complete interrupt sharply. Improve the system performance effectively. > There is always a trade off of throughput and latency by using > interrupt coalescing. It's not reasonable to assume that the > throughput is the only factor to be considered and set the coalescing > threshold and timeout to the max value by default. Have you carried > out other benchmark like copying many small files? No, I didn't test small file. I think this won't affect system load. I can have a test and describe the result in next patch. > It will be safer to make the coalescing runtime configurable like the > sata_mv driver, IMO. Ok, I will do it like this in next patch. - Leo -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
