HP c-Class Performance Tuning manual Index

Page 33

Windows driver affinity, setting	29
Windows system performance	9, 24
write bandwidth test 7

Z

zero copy 10 16

Index 33

Image 33

Contents HP IO Accelerator Performance Tuning Guide Page Contents Setting Windows driver affinity Introduction About the Performance and Tuning GuideVerifying Linux system performance System performanceWrite bandwidth test System performance Verifying Windows system performance with Iometer Debugging performance issues Improperly configured benchmarkOversubscribed bus Handling PCIe errors PCIe link width improperly negotiated CPU thermal throttling or auto-idling Slow performance using RAID5 on Linux Using CP and other system utilitiesBenchmarking through a filesystem To avoid this issue. For more information, see the patch General tuning techniques Using direct I/O, unbuffered, or zero copyMultiple outstanding IOs $ dd if=/dev/zero of=/dev/fioX bs=10M oflag=direct Pre-conditioning$ echo 4096 /sys/block/fio name/queue/nrrequests Pre-allocating memoryPreallocatemb Increased steady-state write performance with fio-format Tuning techniques for writesExt2-3-4 tuning Linux filesystem tuningStride = chunk size / filesystem block size Stripewidth = dbd * strideOptions iomemory-vsl preallocatememory=1072,4997,6710,10345 Using the IO Accelerator as swap spaceFio benchmark Compiling the fio benchmark$ tar xjvf fio-X.Y.Z.tar.bz2 $ cd fio-X.Y.Z Page Using direct I/O on Linux Programming using direct I/OFd = openfilename, Owronly Fd = openfilename, Owronly OdirectUsing direct I/O on Windows ++ code sample Programming using direct I/O Programming using direct I/O Windows driver affinity Setting Windows driver affinityCreate the SetWorkerAffinity2 tag of type Regdword Acronyms and abbreviations Index Index