Hi, Here are 2 small patches which try to fulfill a point in the perf todo list:
* Forward port the page fault tracepoints and use it in 'trace'. http://git.kernel.org/?p=linux/kernel/git/acme/linux.git;a=commitdiff;h=d53b11976093b6d8afeb8181db53aaffc754920d;hp=32ba4abf60ae1b710d22a75725491815de649bc5 There are some questionable points: * With luck I think I found the patch related with the todo item (the link in the todo wiki page is broken); I hope I am not wrong... * In the patch mentioned above, I found only changes related with tracepoints creations and calls; the tracepoints were declared generic (in include/trace/events/kmem.h) but were only called in x86 (arch/x86/mm/fault.c); as in x86, the tracepoint "mm_pagefault_start" looks fairly like "page_fault_user" and "page_fault_kernel", I decided to only create one x86-specific tracepoint: "page_fault_exit"; maybe, you would prefer declaring generic tracepoints; * No option has been added for activating page-fault duration calculation: if the needed tracepoints are available, durations will be printed; maybe, that was not what you were looking for. The patches were generated against tip/perf/core. Alexis. Alexis Berlemont (2): perf, x86-mm: Add exit-fault tracing perf: add page fault duration measures in perf trace arch/x86/include/asm/trace/exceptions.h | 21 +++ arch/x86/mm/fault.c | 1 + tools/perf/builtin-trace.c | 225 ++++++++++++++++++++++++++++---- 3 files changed, 221 insertions(+), 26 deletions(-) -- 2.10.1
