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These instructions are deliberately very basic. If you want something clever,go read the real docs ;-) Please don't add more stuff, but feel free to correct my mistakes ;-) (firstname.lastname@example.org)Thanks to John Levon, Dave Hansen, et al. for help writing this.<test> is the thing you're trying to measure.Make sure you have the correct System.map / vmlinux referenced!It is probably easiest to use "make install" for linux and hack/sbin/installkernel to copy vmlinux to /boot, in addition to vmlinuz,config, System.map, which are usually installed by default.Readprofile-----------A recent readprofile command is needed for 2.6, such as found in util-linux2.12a, which can be downloaded from:http://www.kernel.org/pub/linux/utils/util-linux/Most distributions will ship it already.Add "profile=2" to the kernel command line.clear readprofile -r <test>dump output readprofile -m /boot/System.map > captured_profileOprofile--------Get the source (see Changes for required version) fromhttp://oprofile.sourceforge.net/ and add "idle=poll" to the kernel commandline.Configure with CONFIG_PROFILING=y and CONFIG_OPROFILE=y & reboot on new kernel./configure --with-kernel-supportmake installFor superior results, be sure to enable the local APIC. If opreport seesa 0Hz CPU, APIC was not on. Be aware that idle=poll may mean a performancepenalty.One time setup: opcontrol --setup --vmlinux=/boot/vmlinuxclear opcontrol --resetstart opcontrol --start <test>stop opcontrol --stopdump output opreport > output_fileTo only report on the kernel, run opreport -l /boot/vmlinux > output_fileA reset is needed to clear old statistics, which survive a reboot.