In dd test,I use Linux top tools,and I found 2 raid use different cores, CPU occupancy of each raid5 reach to 80% , is any lock contention between two raid? ------------------------------------------------------------------ 发件人：Tommy Apel <tommyapeldk@xxxxxxxxx> 发送时间：2013年12月16日(星期一) 16:13 收件人：lilofile <lilofile@xxxxxxxxxx> 抄 送：Pieter De Wit <pieter@xxxxxxxxxxxxx>; linux-raid Raid <linux-raid@xxxxxxxxxxxxxxx>; Tommy Apel <tommyapeldk@xxxxxxxxx> 主 题：Re: 答复：two raid5 performance Try to use taskset command to make sure the dd commands are handled by different cores otherwise you'll starve 1 core. On Dec 16, 2013 8:58 AM, "lilofile" <lilofile@xxxxxxxxxx> wrote: the disks involved in the array is sTEC ssd disk,they are connected by mpt2sas 6Gb/s ------------------------------------------------------------------ 发件人：Pieter De Wit <pieter@xxxxxxxxxxxxx> 发送时间：2013年12月16日(星期一) 15:52 收件人：lilofile <lilofile@xxxxxxxxxx>; unlisted-recipients: <unlisted-recipients:> 抄 送：linux-raid <linux-raid@xxxxxxxxxxxxxxx> 主 题：Re: two raid5 performance On 16/12/2013 14:07, lilofile wrote: > when I Create a raid5,dd 1M block size,the performance can reached to 1GB/s > when I create another raid5,dd 1M block size ,the performance can reached to 1GB/s > when I simultaneously dd the two different raid,the total performance only reached to 1.4GB/s,why can not reached to 2GB/s. > > the memory is 32GB,CPU is x5660,the stripe size is 4096 > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html What is the disks involved in the array ? How are they connected ? -- To unsubscribe from this list: send the line "unsubscribe linux-raid" 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-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
