Linux Kernel https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v2.6.29.2 2008-11-26T07:29:32Z 2008-11-26T07:29:32Z Arjan van de Ven arjan@infradead.org 2008-11-24T00:49:58Z urn:sha1:f3f47a6768a29448866da4422b6f6bee485c947f Impact: new "power-tracer" ftrace plugin This patch adds a C/P-state ftrace plugin that will generate detailed statistics about the C/P-states that are being used, so that we can look at detailed decisions that the C/P-state code is making, rather than the too high level "average" that we have today. An example way of using this is: mount -t debugfs none /sys/kernel/debug echo cstate > /sys/kernel/debug/tracing/current_tracer echo 1 > /sys/kernel/debug/tracing/tracing_enabled sleep 1 echo 0 > /sys/kernel/debug/tracing/tracing_enabled cat /sys/kernel/debug/tracing/trace | perl scripts/trace/cstate.pl > out.svg Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>