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 ;-)    (mbligh@aracnet.com)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_profile Oprofile--------Get the source (I use 0.8) from http://oprofile.sourceforge.net/and add "idle=poll" to the kernel command lineConfigure with CONFIG_PROFILING=y and CONFIG_OPROFILE=y & reboot on new kernel./configure --with-kernel-supportmake install For 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/vmlinux clear		opcontrol --resetstart		opcontrol --start		<test>stop		opcontrol --stopdump output	opreport >  output_file To only report on the kernel, run opreport /boot/vmlinux > output_file A reset is needed to clear old statistics, which survive a reboot.