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Full Discussion: Using perf stat -p argument
Top Forums Shell Programming and Scripting Using perf stat -p argument Post 302965926 by BHASKAR JUPUDI on Thursday 4th of February 2016 05:22:38 PM
Old 02-04-2016
Linux Using perf stat -p argument
Hi,

I'm trying to record metrics for an application called memcached. The procedure that I followed is:

1) Start the server using this command:
Code:
memcached -t 4 -m 4096 -n 550

2) Start the client using this command (after warming up the server):
Code:
./loader -a ../twitter_dataset/twitter_dataset_30x -s servers.txt -g 0.8 -T 1 -c 200 -w 8 -e -r (requests_per_second)

3) Now after the connection is established, I'm now trying to record the metrics using this command:
Code:
perf stat --log-fd 3 -e cycles -p $pid sleep 1 3>results.log

Explanation of perf command that I'm using:
This will record metric - cycles for the server memcached for 1 second.

But I'm getting weird results from the above command. I think that pid that I'm catching is not the full load of the server. I'm getting the results in order of 100's which seems weird. Can anyone please suggest any alternative method to overcome this (or what am I doing wrong here)?
 

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LEARN ABOUT DEBIAN

memccp

MEMCP(1)							   libmemcached 							  MEMCP(1)

NAME

       memcp - libmemcached Documentation

       Copies files to a collection of memcached servers

SYNOPSIS

       memcp [options] [file] [server]

DESCRIPTION

       memcp copies one or more files into memcached(1) servers.  It is similar to the standard UNIX cp(1) command.

       The key names will be the names of the files, without any directory path.

OPTIONS

       You can specify servers via the option:

       --servers

       or via the environment variable:

       `MEMCACHED_SERVERS`

       If you do not specify either these, the final value in the command line list is the name of a server(s).

       For a full list of operations run the tool with the option:

       --help

HOME

       To find out more information please check: http://libmemcached.org/

AUTHOR

       Brian Aker, <brian@tangent.org>

       Mark Atwood, <mark@fallenpegasus.com>

SEE ALSO

       memcached(1) libmemcached(3)

AUTHOR

       Brian Aker

COPYRIGHT

       2011, Brian Aker DataDifferential, http://datadifferential.com/

1.0.8								   May 22, 2012 							  MEMCP(1)
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