On Fri, Oct 12, 2012 at 10:50:49AM +0200, Woegerer, Paul wrote: > Hi, > > the attached patch enables tracing of sched_process_exec events by > adding upstream kernel commit: > https://github.com/torvalds/linux/commit/4ff16c25e2cc48cbe6956e356c38a25ac063a64d > to the linux-omap4-3.1.0 kernel recipe (tested with pandaboard). > > We added this to our meta-ti mirror. It would be great if this could > also be upstream.
Paul, Care to port it to the 3.4 version we now have for OMAP4? -- Denys > -- > Paul Woegerer | SW Development Engineer > http://go.mentor.com/sourceryanalyzer > > Mentor Embedded(tm) | Prinz Eugen Straße 72/2/4, Vienna, 1040 Austria > Nucleus® | Linux® | Android(tm) | Services | UI | Multi-OS > > Android is a trademark of Google Inc. Use of this trademark is subject to > Google Permissions. > Linux is the registered trademark of Linus Torvalds in the U.S. and other > countries. > > From f1ae5aa3b3029073d20e542a45f8f6b25a4aab12 Mon Sep 17 00:00:00 2001 > From: Paul Woegerer <[email protected]> > Date: Fri, 12 Oct 2012 00:40:24 -0700 > Subject: [PATCH] linux-omap4-3.1.0: Add sched_process_exec tracing > > --- > .../linux-omap4-3.1.0/add_exec_tracepoint.patch | 109 > ++++++++++++++++++++ > recipes-kernel/linux/linux-omap4_3.1.0.bb | 3 +- > 2 files changed, 111 insertions(+), 1 deletion(-) > create mode 100644 > recipes-kernel/linux/linux-omap4-3.1.0/add_exec_tracepoint.patch > > diff --git a/recipes-kernel/linux/linux-omap4-3.1.0/add_exec_tracepoint.patch > b/recipes-kernel/linux/linux-omap4-3.1.0/add_exec_tracepoint.patch > new file mode 100644 > index 0000000..0d9a63b > --- /dev/null > +++ b/recipes-kernel/linux/linux-omap4-3.1.0/add_exec_tracepoint.patch > @@ -0,0 +1,109 @@ > +From 4ff16c25e2cc48cbe6956e356c38a25ac063a64d Mon Sep 17 00:00:00 2001 > +From: David Smith <[email protected]> > +Date: Tue, 7 Feb 2012 10:11:05 -0600 > +Subject: [PATCH] tracepoint, vfs, sched: Add exec() tracepoint > + > +Added a minimal exec tracepoint. Exec is an important major event > +in the life of a task, like fork(), clone() or exit(), all of > +which we already trace. > + > +[ We also do scheduling re-balancing during exec() - so it's useful > + from a scheduler instrumentation POV as well. ] > + > +If you want to watch a task start up, when it gets exec'ed is a good place > +to start. With the addition of this tracepoint, exec's can be monitored > +and better picture of general system activity can be obtained. This > +tracepoint will also enable better process life tracking, allowing you to > +answer questions like "what process keeps starting up binary X?". > + > +This tracepoint can also be useful in ftrace filtering and trigger > +conditions: i.e. starting or stopping filtering when exec is called. > + > +Signed-off-by: David Smith <[email protected]> > +Signed-off-by: Peter Zijlstra <[email protected]> > +Cc: Steven Rostedt <[email protected]> > +Cc: Christoph Hellwig <[email protected]> > +Cc: Al Viro <[email protected]> > +Cc: Andrew Morton <[email protected]> > +Cc: Linus Torvalds <[email protected]> > +Link: http://lkml.kernel.org/r/[email protected] > +Signed-off-by: Ingo Molnar <[email protected]> > +--- > + fs/exec.c | 9 ++++++--- > + include/trace/events/sched.h | 27 +++++++++++++++++++++++++++ > + 2 files changed, 33 insertions(+), 3 deletions(-) > + > +diff --git a/fs/exec.c b/fs/exec.c > +index aeb135c..d0d2080 100644 > +--- a/fs/exec.c > ++++ b/fs/exec.c > +@@ -63,6 +63,8 @@ > + #include <trace/events/task.h> > + #include "internal.h" > + > ++#include <trace/events/sched.h> > ++ > + int core_uses_pid; > + char core_pattern[CORENAME_MAX_SIZE] = "core"; > + unsigned int core_pipe_limit; > +@@ -1401,9 +1403,10 @@ int search_binary_handler(struct linux_binprm > *bprm,struct pt_regs *regs) > + */ > + bprm->recursion_depth = depth; > + if (retval >= 0) { > +- if (depth == 0) > +- ptrace_event(PTRACE_EVENT_EXEC, > +- old_pid); > ++ if (depth == 0) { > ++ trace_sched_process_exec(current, > old_pid, bprm); > ++ ptrace_event(PTRACE_EVENT_EXEC, > old_pid); > ++ } > + put_binfmt(fmt); > + allow_write_access(bprm->file); > + if (bprm->file) > +diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h > +index 6ba596b..e61ddfe 100644 > +--- a/include/trace/events/sched.h > ++++ b/include/trace/events/sched.h > +@@ -6,6 +6,7 @@ > + > + #include <linux/sched.h> > + #include <linux/tracepoint.h> > ++#include <linux/binfmts.h> > + > + /* > + * Tracepoint for calling kthread_stop, performed to end a kthread: > +@@ -276,6 +277,32 @@ TRACE_EVENT(sched_process_fork, > + ); > + > + /* > ++ * Tracepoint for exec: > ++ */ > ++TRACE_EVENT(sched_process_exec, > ++ > ++ TP_PROTO(struct task_struct *p, pid_t old_pid, > ++ struct linux_binprm *bprm), > ++ > ++ TP_ARGS(p, old_pid, bprm), > ++ > ++ TP_STRUCT__entry( > ++ __string( filename, bprm->filename ) > ++ __field( pid_t, pid ) > ++ __field( pid_t, old_pid ) > ++ ), > ++ > ++ TP_fast_assign( > ++ __assign_str(filename, bprm->filename); > ++ __entry->pid = p->pid; > ++ __entry->old_pid = p->pid; > ++ ), > ++ > ++ TP_printk("filename=%s pid=%d old_pid=%d", __get_str(filename), > ++ __entry->pid, __entry->old_pid) > ++); > ++ > ++/* > + * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE > + * adding sched_stat support to SCHED_FIFO/RR would be welcome. > + */ > +-- > +1.7.6.5 > diff --git a/recipes-kernel/linux/linux-omap4_3.1.0.bb > b/recipes-kernel/linux/linux-omap4_3.1.0.bb > index c57d034..7e67055 100644 > --- a/recipes-kernel/linux/linux-omap4_3.1.0.bb > +++ b/recipes-kernel/linux/linux-omap4_3.1.0.bb > @@ -3,7 +3,7 @@ COMPATIBLE_MACHINE = "pandaboard" > require linux.inc > > # The main PR is now using MACHINE_KERNEL_PR, for omap4 see > conf/machine/include/omap4.inc > -MACHINE_KERNEL_PR_append = "a" > +MACHINE_KERNEL_PR_append = "b" > > CORTEXA8FIXUP = "no" > > @@ -12,6 +12,7 @@ SRCREV = "a5c60c099296fcfc0c8fa8085c40883971486512" > > SRC_URI = > "git://dev.omapzoom.org/pub/scm/integration/kernel-ubuntu.git;protocol=git;branch=ti-ubuntu-3.1-1282 > \ > > file://0001-Makefile.fwinst-fix-install-breakage-for-FW-images-r.patch \ > + file://add_exec_tracepoint.patch \ > file://defconfig \ > " > > -- > 1.7.9.5 > > _______________________________________________ > meta-ti mailing list > [email protected] > https://lists.yoctoproject.org/listinfo/meta-ti _______________________________________________ meta-ti mailing list [email protected] https://lists.yoctoproject.org/listinfo/meta-ti
