Re: [PerfSuite-users] How to Profile a daemon process

[Rick K. <rk...@nc...>]

Dawei,

One thing you might consider trying is to replace the executable that=20
corresponds to the daemon program with a wrapper script that invokes psrun=
=20
on the true daemon program.  For example, rename Child.exe to=20
Child.exe.orig and create a new file named Child.exe that is a shell=20
script that runs the command "psrun Child.exe.orig", passing along any=20
arguments necessary for Child.exe.  This would be the quickest way to see
if things might work as a first cut.

Also, psrun does not actually do any performance monitoring itself nor=20
does it write out the XML result documents; this is done through libraries=
=20
that are "inserted" into the program that is being monitored.

The usual reason for zeroes being reported are that the program does not=20
consume enough CPU time to collect any data, and it sounds like this is=20
what you may be seeing here.

Rick

On Sun, 7 Jan 2007, liudawei wrote:

> Hi:
>
> I have encountered a problem when I use psrun to profile a Demon process =
and its child process is also Demon process. The example is here.
>
> Psrun -f Daemon.exe
>
> Iet me describe the how this  Daemon work, I want to profile the Daemon a=
nd its child process. here, all the child process is daemon process too. Th=
e problem I encountered is that all the results(xml file produced by psrun)=
 is zero. I try to read the source code of the psrun. I guess that psrun wi=
ll fork a process to execute the program which is profiled (here is the Dae=
mon.exe). But as we know that if the program to be profiled is daemon proce=
ss, I think when the daemon process is created successfully, it will kill h=
is father process, however, psrun is just waiting for this signal to finish=
ed the profile. so, if the Daemon is start,the psrun will stop right now. s=
o, all the results is zero.
>
> Can any one give some suggestion? or give a patch to psrun, so let psrun =
can monitor daemon type program.
>
> You can download the Oracle TimesTen , then use psrun to verify the probl=
em I encountred.
>
>
> Waiting for a reply.
>
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