linux-toradex.git/include/trace/events/workqueue.h, branch Colibri_T30_LinuxImageV2.1Beta2_20140206

workqueue: CPU hotplug keep idle workers

2012-08-13T21:49:54+00:00

This change merges two patchsets. The first set,
containing 6 patches, reimplements WQ_HIGHPRI
to use a seperate worker_pool. gcwq->pools[0]
is used for normal priority work and pools[1]
for high priority.

The second patchset contains 9 patches and
reimplements CPU hotplug to keep idle workers.
Updates workqueue CPU hotplug path to use a
disassociated global_cwq, which runs as an
unbound one (WQ_UNBOUND). While this requires
rebinding idle workers, overall hotplug path
is much simpler.

Original patchset:
http://thread.gmane.org/gmane.linux.kernel/1329164

Bug 978010

Change-Id: Ic66ec8848a8d111b5278e63ef6a410846dfd8fcc
Signed-off-by: Mitch Luban 
Reviewed-on: http://git-master/r/118387
Reviewed-by: Diwakar Tundlam 
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Peter Boonstoppel 
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani

workqueue: add queue_work and activate_work trace points

2010-10-05T08:49:55+00:00

These two tracepoints allow tracking when and how a work is queued and
activated.  This patch is based on Frederic's patch to add queue_work
trace point.

Signed-off-by: Tejun Heo 
Cc: Frederic Weisbecker

workqueue: prepare for more tracepoints

2010-10-05T08:41:14+00:00

Define workqueue_work event class and use it for workqueue_execute_end
trace point.  Also, move trace/events/workqueue.h include downwards
such that all struct definitions are visible to it.  This is to
prepare for more tracepoints and doesn't cause any functional change.

Signed-off-by: Tejun Heo 
Cc: Frederic Weisbecker

workqueue: Add basic tracepoints to track workqueue execution

2010-08-21T20:19:37+00:00

With the introduction of the new unified work queue thread pools,
we lost one feature: It's no longer possible to know which worker
is causing the CPU to wake out of idle. The result is that PowerTOP
now reports a lot of "kworker/a:b" instead of more readable results.

This patch adds a pair of tracepoints to the new workqueue code,
similar in style to the timer/hrtimer tracepoints.

With this pair of tracepoints, the next PowerTOP can correctly
report which work item caused the wakeup (and how long it took):

Interrupt (43)            i915      time   3.51ms    wakeups 141
Work      ieee80211_iface_work      time   0.81ms    wakeups  29
Work              do_dbs_timer      time   0.55ms    wakeups  24
Process                   Xorg      time  21.36ms    wakeups   4
Timer    sched_rt_period_timer      time   0.01ms    wakeups   1

Signed-off-by: Arjan van de Ven 
Signed-off-by: Linus Torvalds

workqueue: temporarily remove workqueue tracing

2010-06-29T08:07:11+00:00

Strip tracing code from workqueue and remove workqueue tracing.  This
is temporary measure till concurrency managed workqueue is complete.

Signed-off-by: Tejun Heo 
Cc: Frederic Weisbecker

tracing: Convert some workqueue events to DEFINE_EVENT

2009-11-26T08:14:03+00:00

Use DECLARE_EVENT_CLASS to remove duplicate code:

   text    data     bss     dec     hex filename
  13171     800      72   14043    36db kernel/workqueue.o.old
  12243     800      68   13111    3337 kernel/workqueue.o

Two events are converted:

  workqueue: workqueue_insertion, workqueue_execution

No change in functionality.

Signed-off-by: Li Zefan 
Cc: Steven Rostedt 
Cc: Frederic Weisbecker 
LKML-Reference: <4B0E289F.5010104@cn.fujitsu.com>
Signed-off-by: Ingo Molnar

tracing/workqueue: Use %pf in workqueue trace events

2009-09-22T21:14:58+00:00

Using %pf instead of %pF supresses printing of the function offset
which will always be 0 in the case of worklet functions.

Signed-off-by: Anton Blanchard 
Cc: KOSAKI Motohiro 
Cc: Li Zefan 
Cc: Zhaolei 
Cc: Lai Jiangshan 
Cc: Ingo Molnar 
Cc: Steven Rostedt 
LKML-Reference: <20090922024033.GB31801@kryten>
Signed-off-by: Frederic Weisbecker

tracing/events: Move TRACE_SYSTEM outside of include guard

2009-07-13T08:59:55+00:00

If TRACE_INCLDUE_FILE is defined, 
will be included and compiled, otherwise it will be


So TRACE_SYSTEM should be defined outside of #if proctection,
just like TRACE_INCLUDE_FILE.

Imaging this scenario:

 #include 
    -> TRACE_SYSTEM == foo
 ...
 #include 
    -> TRACE_SYSTEM == bar
 ...
 #define CREATE_TRACE_POINTS
 #include 
    -> TRACE_SYSTEM == bar !!!

and then bar.h will be included and compiled.

Signed-off-by: Li Zefan 
Cc: Steven Rostedt 
Cc: Frederic Weisbecker 
LKML-Reference: <4A5A9CF1.2010007@cn.fujitsu.com>
Signed-off-by: Ingo Molnar

ftrace, workqueuetrace: make workqueue tracepoints use TRACE_EVENT macro

2009-06-01T23:10:40+00:00

v3: zhaolei@cn.fujitsu.com: Change TRACE_EVENT definition to new format
    introduced by Steven Rostedt: consolidate trace and trace_event headers
v2: kosaki@jp.fujitsu.com: print the function names instead of addr, and zap
    the work addr
v1: zhaolei@cn.fujitsu.com: Make workqueue tracepoints use TRACE_EVENT macro

TRACE_EVENT is a more generic way to define tracepoints.
Doing so adds these new capabilities to the tracepoints:

  - zero-copy and per-cpu splice() tracing
  - binary tracing without printf overhead
  - structured logging records exposed under /debug/tracing/events
  - trace events embedded in function tracer output and other plugins
  - user-defined, per tracepoint filter expressions

Then, this patch converts DEFINE_TRACE to TRACE_EVENT in workqueue related
tracepoints.

[ Impact: expand workqueue tracer to events tracing ]

Signed-off-by: Zhao Lei 
Cc: Steven Rostedt 
Cc: Tom Zanussi 
Cc: Oleg Nesterov 
Cc: Andrew Morton 
Signed-off-by: KOSAKI Motohiro 
Signed-off-by: Frederic Weisbecker