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Date: Tue, 3 Jun 2008 11:50:40 -0400 (EDT)
From: Steven Rostedt <rostedt@goodmis.org>
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To: Thomas Gleixner <tglx@linutronix.de>
cc: linux-rt-users <linux-rt-users@vger.kernel.org>,
Darren Hart <dvhltc@us.ibm.com>,
Subrata Modak <subrata@linux.vnet.ibm.com>
Subject: [PATCH - cyclictest] handle latest ftrace
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This patch has cyclictest work a bit better with ftrace. Some new options
have been added.
When -b is used:
-P : use the preemptoff tracer
-I : use the irqsoff tracer
-B : use preemptirqsoff tracer
If the above are not set, then it tries to use "events" tracer if it is
available (currently only available in the -rt kernel) and if that is not
set, it defaults to the sched-switch tracer.
-f will enabled the function tracer.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Clark Williams <williams@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Luis Claudio Goncalves <lclaudio@uudg.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Clark Williams <williams@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Luis Claudio Goncalves <lclaudio@uudg.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Clark Williams <williams@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Luis Claudio Goncalves <lclaudio@uudg.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Problem: when running cyclic test, short options are not parsing
optional arguments correctly when followed by a space.
"-t3" works, but "-t 3" does not.
- Fix the processing of options with optional parameters, so that the user
can write -tNUM or -t NUM and it will work as expected. This was done
for the -t and -a options
- Modify the usage messages to correspond with the way the program makes use
of the options.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Import an updated version number into RPM spec file.
Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Data reduction (-o mode) did not work correctly with >1 threads.
Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
I noticed I had a typo on sched_switch. I tested this on linux-tip tree
and it works there.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Darren Hart <dvhltc@us.ibm.com>
Cc: Subrata Modak <subrata@linux.vnet.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This patch has cyclictest work a bit better with ftrace. Some new options
have been added.
When -b is used:
-P : use the preemptoff tracer
-I : use the irqsoff tracer
-B : use preemptirqsoff tracer
If the above are not set, then it tries to use "events" tracer if it is
available (currently only available in the -rt kernel) and if that is not
set, it defaults to the sched-switch tracer.
-f will enabled the function tracer.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Darren Hart <dvhltc@us.ibm.com>
Cc: Subrata Modak <subrata@linux.vnet.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Not everyone mounts debugfs at /debug. This patch makes cyclictest search
for debugfs in the /proc/mounts directory.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Darren Hart <dvhltc@us.ibm.com>
Cc: Subrata Modak <subrata@linux.vnet.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The appropriate cycle number of the maximum is now sent when in -o
mode. This is needed to more accurately determine the trace line that
is related to a particular latency.
Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The version check in cyclic test fails if proc isn't mounted or if OS
name isn't Linux (uClinux isn't uncommon). This patch fixes both
issues.
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
CPU affinity isn't supported by all uClibc ports right now.
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
as of uClibc-20080416 clock_nanosleep is still not implemented.
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
When the output of the -v option is piped into another program and if
more data are sent than the other program can eat, data points get
lost. Since high latency values normally occur much less frequently
than average latency values, the connected program will miss many of
the high latency values, and the realtime capability of a given system
may appear much better than it is.
Therefore, the new option -o RED was introduced. This option causes
cyclictest to suppress every subsequent RED number of samples and
replace them with the maximum of the values encountered during that
sampling interval.
Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
- Added support for the kernel tracer as of kernel 2.6.24
- Options mostly identical, irrespective of the kernel version
- Added check whether debug fs is mounted and tracing configured
- -v (verbose) option additionally makes tracing more verbose
Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Add CPU affinitt option to cyclictest.
1. New option -a:
without argument to a cyclictest spreads the threads consecutive on
the available CPUs. On a quad core machine we get:
-a -t4 Thread #0 -> CPU #0
Thread #1 -> CPU #1
Thread #2 -> CPU #2
Thread #3 -> CPU #3
-a -t5 Thread #0 -> CPU #0
Thread #1 -> CPU #1
Thread #2 -> CPU #2
Thread #3 -> CPU #3
Thread #4 -> CPU #0
Adding a CPU number to the -a option all threads are pinned to
the given CPU:
-a3 -t4 Thread #0 -> CPU #3
Thread #1 -> CPU #3
Thread #2 -> CPU #3
Thread #3 -> CPU #3
2. extension of the -t option:
Without argument to -t cyclictest starts as many threads as CPUs are
available.
Signed-off-by: Carsten Emde <c.emde@osadl.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Clark Williams
Alessio Igor Bogani
Sven-Thorsten Dietrich
Thomas Gleixner
John Kacur
Carsten Emde
Steven Rostedt
Sebastian Siewior