TPROF(8) BSD System Manager's Manual TPROF(8)NAME
tprof -- record tprof profiling samples
SYNOPSIS
tprof [-c] [-o file] command ...
DESCRIPTION
The tprof is a sampling based profiler.
tprof utility makes the kernel driver start profiling, executes the specified command, keeps recording samples from the kernel driver until
the command finishes, and reports statistics to the standard error.
The tprof pseudo driver and a suitable backend should be loaded beforehand.
The tprof utility accepts the following options.
-o file Write the collected samples to the file named file. The default is ``tprof.out''.
-c Write the collected samples to the standard output. Note that the output is a binary stream.
EXAMPLES
The following command profiles the system during 1 second and shows the top-10 kernel functions which likely consumed CPU cycles.
tprof -c sleep 1 2>/dev/null | tpfmt -skCLP | head -10
DIAGNOSTICS
The tprof utility reports the following statistics about the activities of the tprof pseudo driver.
sample The number of samples collected and prepared for userland consumption.
overflow The number of samples dropped because the per-CPU buffer was full.
buf The number of buffers successfully prepared for userland consumption.
emptybuf The number of buffers which have been dropped because they were empty.
dropbuf The number of buffers dropped because the number of buffers kept in the kernel exceeds the limit.
dropbuf_samples The number of samples dropped because the buffers containing the samples were dropped.
SEE ALSO tpfmt(1), tprof(4)AUTHORS
The tprof utility is written by YAMAMOTO Takashi.
CAVEATS
The contents and representation of recorded samples are undocumented and will likely be changed for future releases of NetBSD in an incompat-
ible way.
BSD November 26, 2011 BSD
Check Out this Related Man Page
sadc(8) BSD System Manager's Manual sadc(8)NAME
sadc -- system activity data collector
SYNOPSIS
/usr/lib/sa/sadc [-m mode] [t n] [ofile]
DESCRIPTION
The sadc tool is used to collect cumulative system activity data. The sample system data is collected at intervals t seconds apart, in a
loop n times. The binary sample data is written to ofile if specified. Otherwise, the binary data is written to stdout. If the ofile file
does not exist, it is created, otherwise it is truncated.
sadc is intended to be used as the engine behind the sar(1) command, and is not typically invoked on the command line. Two shell scripts,
sa1 and sa2, are provided to drive the typical sampling, saving, and reporting process.
OPTIONS
The following options modify the way data is collected by sadc.
-m mode Modify the collection of system statistics as specified by mode. Currently only one mode is supported.
PPP By default, the collection of ppp network interface statistics is turned off. This is because the number of ppp connec-
tions can be very high, causing the raw data file to grow unexpectedly large, especially when samples are collected at
short intervals. Use the PPP mode to turn the collection back on.
EXAMPLES
/usr/lib/sa/sadc 15 20 /tmp/sample.out
This call collects 20 samples at 15 second intervals. The binary data is written to the /tmp/sample.out file
FILES
/var/log/sa/sadd Default daily activity file that holds the binary sampling data. dd are digits that represent the day of the month.
/usr/lib/sa/sa1 Shell script used to drive the sar data collection.
/usr/lib/sa/sa2 Shell script used to drive the sar data reporting.
SEE ALSO fs_usage(1), netstat(1), sar(1), sc_usage(1), top(1), vm_stat(1), iostat(8), sa1(8), sa2(8)Mac OS X Jul 25 2003 Mac OS X
Hi,
I have very little knowledge with unix and pmcmd. I need help with a issue.
I have to see whether a file has been dropped in a particular location/path. If the file dropped I have to check the last modified time, which should be greater than 8pmEST the prior day. If the file has been... (4 Replies)
I'm using a shell script to manipulate a data file. I have a large file with two sets of data samples (tracking memory consumption) taken over a long period of time, so I have many samples. The problem is that all the data is in the same file so that each sample contains two sets of data.... (2 Replies)
Hi.
I have a LOOONG list of samples but I am not sure how to write the loop/script to calculate the mean...
I normally use awk...
...................MEAN
Sample1 25.82 40.61333
Sample1 47.6
Sample1 48.42
Sample2 54.03 54.12
Sample2 53.98
Sample2 54.35
etc.....
I would like to... (4 Replies)