RAID-5 & RAID-0 lower read performance using ADMA + HW XOR engine | |
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Recently I ported ADMA interface to of of our AMCC powerPC chips. Which has High Speed DMA and HW XOR acceleration. I am using high speed DMA to do memcopy in RAID-0 . In RAID-5 I am using DMA + HW XOR engine. I am using IO-meter to test the performance. RAID-0: (page size 64k, File System Block size 64k) READ: 27MBps Write: 68MBps RAID-5: (Page size 64K and File system Block size 64k) READ: 28MBps WRITE: 50MBps I see there is lot of IO wait time. Any suggestions how to reduce IO wait time ? For sure there is no HW acceleration on Read path. Thanks in advance, Marri -- 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
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