On Sunday September 22, sarek@uliweb.de wrote: > Hi! > > It seems as my computer (Athlon XP 2000+) chooses the wrong checksumming > function. > > The kernel output is as follows: > > raid5: measuring checksumming speed > 8regs : 2564.000 MB/sec > 32regs : 2260.000 MB/sec > pIII_sse : 4748.400 MB/sec > pII_mmx : 3921.200 MB/sec > p5_mmx : 5022.400 MB/sec > raid5: using function: pIII_sse (4748.400 MB/sec) > > I hope I can help the developers with this piece of information. > And I also hope I mailed at the right address. The only problem here is that the message is misleading. pIII_sse is deliberately chosen despite appearing not to be so fast because it avoid the level-1 cache which is appropriate for this data which is only used by the CPU once. NeilBrown > > Greets, > -- > Sebastian Schäfer > E-Mail: sarek@uliweb.de || http://www.uliweb.de > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
