On Tue, 2013-01-15 at 15:38 +0800, Mike Qiu wrote: > Currently, multiple MSI feature hasn't been enabled in pSeries, > These patches try to enbale this feature.
Hi Mike, > These patches have been tested by using ipr driver, and the driver patch > has been made by Wen Xiong <wenxi...@linux.vnet.ibm.com>: So who wrote these patches? Normally we would expect the original author to post the patches if at all possible. > [PATCH 0/7] Add support for new IBM SAS controllers I would like to see the full series, including the driver enablement. > Test platform: One partition of pSeries with one cpu core(4 SMTs) and > RAID bus controller: IBM PCI-E IPR SAS Adapter (ASIC) in POWER7 > OS version: SUSE Linux Enterprise Server 11 SP2 (ppc64) with 3.8-rc3 kernel > > IRQ 21 and 22 are assigned to the ipr device which support 2 mutiple MSI. > > The test results is shown by 'cat /proc/interrups': > CPU0 CPU1 CPU2 CPU3 > 21: 6 5 5 5 XICS Level host1-0 > 22: 817 814 816 813 XICS Level host1-1 This shows that you are correctly configuring two MSIs. But the key advantage of using multiple interrupts is to distribute load across CPUs and improve performance. So I would like to see some performance numbers that show that there is a real benefit for all the extra complexity in the code. cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
