From: Cody P Schafer Date: Thu, 8 Jan 2015 01:13:52 +0000 (-0800) Subject: perf Documentation: Add event parameters X-Git-Tag: fixes-v4.0-rc1~180^2~10^2~16 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98a43e0e9917059da32db89829b0eb95453a11ee;p=pandora-kernel.git perf Documentation: Add event parameters Event parameters are a basic way for partial events to be specified in sysfs with per-event names given to the fields that need to be filled in when using a particular event. It is intended for supporting cases where the single 'cpu' parameter is insufficient. For example, POWER 8 has events for physical sockets/cores/cpus that are accessible from with virtual machines. To keep using the single 'cpu' parameter we'd need to perform a mapping between Linux's cpus and the physical machine's cpus (in this case Linux is running under a hypervisor). This isn't possible because bindings between our cpus and physical cpus may not be fixed, and we probably won't have a "cpu" on each physical cpu. Signed-off-by: Cody P Schafer Signed-off-by: Sukadev Bhattiprolu Acked-by: Jiri Olsa Cc: Cody P Schafer Cc: Haren Myneni Cc: Jiri Olsa Cc: Michael Ellerman Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Sukadev Bhattiprolu Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1420679633-28856-4-git-send-email-sukadev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo --- Reading git-diff-tree failed