Hello, I have tried lsiutil and it cannot recognize the LSI controllers. I have talked to the LSI tech support and they told me that lsiutil doesn't support this type of HBA controllers. I found lsiutil in some other place. I couldn't find it in on LSI's website. Do you know where I can download it from LSI's website? Thanks, Da On Mon, Jun 17, 2013 at 2:44 PM, Baruch Even <baruch@xxxxxxxxx> wrote: > On Fri, Jun 14, 2013 at 7:44 PM, Zheng Da <zhengda1936@xxxxxxxxx> wrote: >> Hello, >> >> First, I'm not very sure if this mailing list allows to ask technical >> questions. I apologize if it's not a right place to ask questions. >> >> I use one LSI SAS 9207-8e controllers to attach 8 SSDs to my server. >> They together can deliver over 300,000 IO per second. I use mpt2sas >> driver and MPI-X is enabled. In order to handle so many IOs, I assign >> different IRQs to different CPU cores. >> >> I see very high CPU consumption, so I hope to enable interrupt >> coalescing to reduce CPU consumption. I monitored interrupts by using >> systemtap to count the number of invocations of handle_irq, and found >> the number of interrupts delivered by the LSI HBA is more or less the >> same as the number of IOs performed on the SSDs. I assume interrupt >> coalescing doesn't work in my case. >> >> If so, how do I enable interrupt coalescing in the LSI HBA. I checked >> all mpt2sas parameters and none of them are used to control it. The >> tool lsiutil doesn't work for this controller. I'm pretty sure the LSI >> HBA supports interrupt coalescing. Do I have to use some special >> configuration (the Linux kernel or hardware) in order to make it work? > > lsiutil will enable you to read and control the interrupt coalescing on the hba. > It should be possible to find it on lsi's website. > > Baruch -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
