1These instructions are deliberately very basic. If you want something clever, 2go read the real docs ;-) Please don't add more stuff, but feel free to 3correct my mistakes ;-) (mbligh@aracnet.com) 4Thanks to John Levon, Dave Hansen, et al. for help writing this. 5 6<test> is the thing you're trying to measure. 7Make sure you have the correct System.map / vmlinux referenced! 8IMHO it's easier to use "make install" for linux and hack /sbin/installkernel 9to copy config files, system.map, vmlinux to /boot. 10 11Readprofile 12----------- 13You need a fixed readprofile command for 2.5 ... either get hold of 14a current version from: 15http://www.kernel.org/pub/linux/utils/util-linux/ 16or get readprofile binary fixed for 2.5 / akpm's 2.5 patch from 17ftp://ftp.kernel.org/pub/linux/kernel/people/mbligh/tools/readprofile/ 18 19Add "profile=2" to the kernel command line. 20 21clear readprofile -r 22 <test> 23dump output readprofile -m /boot/System.map > captured_profile 24 25Oprofile 26-------- 27get source (I use 0.5) from http://oprofile.sourceforge.net/ 28add "idle=poll" to the kernel command line 29Configure with CONFIG_PROFILING=y and CONFIG_OPROFILE=y & reboot on new kernel 30./configure --with-kernel-support 31make install 32 33One time setup (pick appropriate one for your CPU): 34P3 opcontrol --setup --vmlinux=/boot/vmlinux \ 35 --ctr0-event=CPU_CLK_UNHALTED --ctr0-count=100000 36Athlon/x86-64 opcontrol --setup --vmlinux=/boot/vmlinux \ 37 --ctr0-event=RETIRED_INSNS --ctr0-count=100000 38P4 opcontrol --setup --vmlinux=/boot/vmlinux \ 39 --ctr0-event=GLOBAL_POWER_EVENTS \ 40 --ctr0-unit-mask=1 --ctr0-count=100000 41 42start daemon opcontrol --start-daemon 43clear opcontrol --reset 44start opcontrol --start 45 <test> 46stop opcontrol --stop 47dump output oprofpp -dl -i /boot/vmlinux > output_file 48 49