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  1. 21 9月, 2009 2 次提交
  3. 20 9月, 2009 1 次提交
  5. 19 9月, 2009 1 次提交
  7. 18 9月, 2009 1 次提交
  9. 16 9月, 2009 2 次提交
  11. 15 9月, 2009 1 次提交
  13. 14 9月, 2009 6 次提交
    • S
      tracing: make testing syscall events a separate configuration · 1f5a6b45
      由 Steven Rostedt 提交于 
      Parag noticed that the number of event tests has increased tremendously:

grep "Testing event" dmesg.31rc9 |wc -l
100

grep "Testing event" dmesg.31git |wc -l
1172

This is due to the testing of every syscall event when ftrace self
test is enabled. This adds a bit more time to kernel boot up and can
affect development by slowing down the time it takes between reboots.

This option makes the testing of the syscall events into a separate
config, to still be able to test most of ftrace internals at boot up
but not have to wait for all the syscall events to be tested.

The syscall event testing only tests the enabling and disabling of
the trace point, since the syscalls are not executed. What really needs
to be done is to somehow have a userspace tool test the syscall tracepoints
as well.
Reported-by: NParag Warudkar <parag.lkml@gmail.com>
LKML-Reference: <f7848160909130815l3e768a30n3b28808bbe5c254b@mail.gmail.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      1f5a6b45
    • L
      tracing: remove some unused macros · 20a58a77
      由 Li Zefan 提交于 
      - remove FTRACE_ENTRY_STRUCT_ONLY()
- remove TRACE_XXX() macros
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4AADF6E6.3080606@cn.fujitsu.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      20a58a77
    • L
      ftrace: add compile-time check on F_printk() · 05ffa2d0
      由 Li Zefan 提交于 
      Make sure F_printk() has corrent format and args, and make sure
changes in F_STRUCT() won't break F_printk().
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4AADF6CC.1060809@cn.fujitsu.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      05ffa2d0
    • L
      tracing: fix F_printk() typos · c16de8fd
      由 Li Zefan 提交于 
      I found some typos in F_printk(), so I wrote compile-time check
for it, and triggered some compile errors and warnings.

I've fixed them on x86_32, but I have no x86_64 in my hand, so there
may still be some compile warnings on 64bits.
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4AADF60B.5070407@cn.fujitsu.com>

[ tested on x86_64, and works fine ]
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      c16de8fd
    • S
      tracing: add static to generated TRACE_EVENT functions · ec827c7e
      由 Steven Rostedt 提交于 
      Some of the generated functions used in the TRACE_EVENT macros are
not declared static, but they are not global.

Discovered by sparse.
Reported-by: NJaswinder Singh Rajput <jaswinder@kernel.org>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      ec827c7e
    • S
      ring-buffer: typecast cmpxchg to fix PowerPC warning · 08a40816
      由 Steven Rostedt 提交于 
      The cmpxchg used by PowerPC does the following:

  ({									 \
     __typeof__(*(ptr)) _o_ = (o);					 \
     __typeof__(*(ptr)) _n_ = (n);					 \
     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,		 \
				    (unsigned long)_n_, sizeof(*(ptr))); \
  })

This does a type check of *ptr to both o and n.

Unfortunately, the code in ring-buffer.c assigns longs to pointers
and pointers to longs and causes a warning on PowerPC:

ring_buffer.c: In function 'rb_head_page_set':
ring_buffer.c:704: warning: initialization makes pointer from integer without a cast
ring_buffer.c:704: warning: initialization makes pointer from integer without a cast
ring_buffer.c: In function 'rb_head_page_replace':
ring_buffer.c:797: warning: initialization makes integer from pointer without a cast

This patch adds the typecasts inside cmpxchg to annotate that a long is
being cast to a pointer and a pointer is being casted to a long and this
removes the PowerPC warnings.
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      08a40816
  15. 13 9月, 2009 8 次提交
  17. 12 9月, 2009 5 次提交
  19. 11 9月, 2009 2 次提交
    • S
      tracing: move tgid out of generic entry and into userstack · 48659d31
      由 Steven Rostedt 提交于 
      The userstack trace required the recording of the tgid entry.
Unfortunately, it was added to the generic entry where it wasted
4 bytes of every entry and was only used by one entry.

This patch moves it out of the generic field and moves it into the
only user (userstack_entry).
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      48659d31
    • S
      tracing: add latency format to function_graph tracer · 49ff5903
      由 Steven Rostedt 提交于 
      While debugging something with the function_graph tracer, I found the
need to see the preempt count of the traces. Unfortunately, since
the function graph tracer has its own output formatting, it does not
honor the latency-format option.

This patch makes the function_graph tracer honor the latency-format
option, but still keeps control of the output. But now we have the
same details that the latency-format supplies.

 # tracer: function_graph
 #
 #      _-----=> irqs-off
 #     / _----=> need-resched
 #    | / _---=> hardirq/softirq
 #    || / _--=> preempt-depth
 #    ||| /
 #    ||||
 # CPU||||  DURATION                  FUNCTION CALLS
 # |  ||||   |   |                     |   |   |   |
  3)  d..1  1.333 us    |        idle_cpu();
  3)  d.h1              |        tick_check_idle() {
  3)  d.h1  0.550 us    |          tick_check_oneshot_broadcast();
  3)  d.h1              |          tick_nohz_stop_idle() {
  3)  d.h1              |            ktime_get() {
  3)  d.h1              |              ktime_get_ts() {
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      49ff5903
  21. 10 9月, 2009 6 次提交
  23. 05 9月, 2009 5 次提交
    • S
      ring-buffer: only enable ring_buffer_swap_cpu when needed · 85bac32c
      由 Steven Rostedt 提交于 
      Since the ability to swap the cpu buffers adds a small overhead to
the recording of a trace, we only want to add it when needed.

Only the irqsoff and preemptoff tracers use this feature, and both are
not recommended for production kernels. This patch disables its use
when neither irqsoff nor preemptoff is configured.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      85bac32c
    • S
      ring-buffer: check for swapped buffers in start of committing · 62f0b3eb
      由 Steven Rostedt 提交于 
      Because the irqsoff tracer can swap an internal CPU buffer, it is possible
that a swap happens between the start of the write and before the committing
bit is set (the committing bit will disable swapping).

This patch adds a check for this and will fail the write if it detects it.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      62f0b3eb
    • S
      tracing: report error in trace if we fail to swap latency buffer · e8165dbb
      由 Steven Rostedt 提交于 
      The irqsoff tracer will fail to swap the cpu buffer with the max
buffer if it preempts a commit. Instead of ignoring this, this patch
makes the tracer report it if the last max latency failed due to preempting
a current commit.

The output of the latency tracer will look like this:

 # tracer: irqsoff
 #
 # irqsoff latency trace v1.1.5 on 2.6.31-rc5
 # --------------------------------------------------------------------
 # latency: 112 us, #1/1, CPU#1 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:4)
 #    -----------------
 #    | task: -4281 (uid:0 nice:0 policy:0 rt_prio:0)
 #    -----------------
 #  => started at: save_args
 #  => ended at:   __do_softirq
 #
 #
 #                  _------=> CPU#
 #                 / _-----=> irqs-off
 #                | / _----=> need-resched
 #                || / _---=> hardirq/softirq
 #                ||| / _--=> preempt-depth
 #                |||| /
 #                |||||     delay
 #  cmd     pid   ||||| time  |   caller
 #     \   /      |||||   \   |   /
    bash-4281    1d.s6  265us : update_max_tr_single: Failed to swap buffers due to commit in progress

Note the latency time and the functions that disabled the irqs or preemption
will still be listed.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      e8165dbb
    • S
      tracing: add trace_array_printk for internal tracers to use · 659372d3
      由 Steven Rostedt 提交于 
      This patch adds a trace_array_printk to allow a tracer to use the
trace_printk on its own trace array.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      659372d3
    • S
      tracing: pass around ring buffer instead of tracer · e77405ad
      由 Steven Rostedt 提交于 
      The latency tracers (irqsoff and wakeup) can swap trace buffers
on the fly. If an event is happening and has reserved data on one of
the buffers, and the latency tracer swaps the global buffer with the
max buffer, the result is that the event may commit the data to the
wrong buffer.

This patch changes the API to the trace recording to be recieve the
buffer that was used to reserve a commit. Then this buffer can be passed
in to the commit.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      e77405ad