Setting Windows driver affinity | HP c-Class Performance Tuning

Setting Windows driver affinity	....................................................................................................................29
Acronyms and abbreviations	31
Index	32

Contents 4

Image 4

HP c-Class Performance Tuning manual Setting Windows driver affinity

Contents

HP IO Accelerator Performance Tuning Guide Page Contents Setting Windows driver affinity About the Performance and Tuning Guide Introduction System performance Verifying Linux system performance Write bandwidth test System performance Verifying Windows system performance with Iometer Improperly configured benchmark Debugging performance issuesOversubscribed bus Handling PCIe errors PCIe link width improperly negotiated CPU thermal throttling or auto-idling Using CP and other system utilities Slow performance using RAID5 on LinuxBenchmarking through a filesystem To avoid this issue. For more information, see the patch Using direct I/O, unbuffered, or zero copy General tuning techniquesMultiple outstanding IOs Pre-conditioning $ dd if=/dev/zero of=/dev/fioX bs=10M oflag=direct Pre-allocating memory $ echo 4096 /sys/block/fio name/queue/nrrequests Preallocatemb Tuning techniques for writes Increased steady-state write performance with fio-format Linux filesystem tuning Ext2-3-4 tuningStride = chunk size / filesystem block size Stripewidth = dbd * stride Using the IO Accelerator as swap space Options iomemory-vsl preallocatememory=1072,4997,6710,10345 Compiling the fio benchmark Fio benchmark$ tar xjvf fio-X.Y.Z.tar.bz2 $ cd fio-X.Y.Z Page Programming using direct I/O Using direct I/O on LinuxFd = openfilename, Owronly Fd = openfilename, Owronly Odirect Using direct I/O on Windows ++ code sample Programming using direct I/O Programming using direct I/O Setting Windows driver affinity Windows driver affinity Create the SetWorkerAffinity2 tag of type Regdword Acronyms and abbreviations Index Index