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Re: [Xen-devel] Re: [Xen-users] Re: xenoprof error

To: "Santos, Jose Renato G" <joserenato.santos@xxxxxx>
Subject: Re: [Xen-devel] Re: [Xen-users] Re: xenoprof error
From: "john bryant" <bryant.johan@xxxxxxxxx>
Date: Thu, 7 Feb 2008 11:05:35 -0500
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Renato and all,

I had posted this error in oprofile list.  This was an issue in oprofile 0.9.2 which was corrected in oprofile 0.9.3. I have used xenoprof patch for both  0.9.2 and 0.9.3. I still see this error in xenoprof whereas with oprofile 0.9.3 I don't see this error- oprofile 0.9.3 works fine.

I had used xenoprof some months back. That time i used RHEL 4 and I didn't see this error previously.


On Feb 6, 2008 12:22 PM, Santos, Jose Renato G <joserenato.santos@xxxxxx> wrote:
This does not seem to be an xenoprof problem, but a general oprofile error.
It seems you are not being able to write to oprofilefs for some reason.
You should see several files under /dev/oprofile after you execute any opcontrol command for the first time (e.g. opcontrol --reset).
Anyway, I suggest that you post your question to the oprofile mailing list (oprofile-list@xxxxxxxxxxxxxxxxxxxxx)

From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of john bryant
Sent: Monday, February 04, 2008 1:06 PMSubject: [Xen-devel] Re: [Xen-users] Re: xenoprof error

Is there a xenoprof developer who can help me ?

On Feb 3, 2008 11:33 PM, john bryant <bryant.johan@xxxxxxxxx> wrote:

For those who are new to xenoprof ( e.g. Todd), I have installed xenorpof patch from following website (please follow the instructions):

For oprofile, I have downloaded from
I have used oprofile 0.9.2


On Feb 3, 2008 10:51 PM, Todd Deshane <deshantm@xxxxxxxxx> wrote:
Hi John,

I don't think you provided the list with enough information. How did you get to this point? What did you install etc.? For example I don't have a opcontrol file that I am aware of.

I don't have much experience with xenoprof either. Could you provide links or packages and a litlle more background into the problem?

Best Regards,

On Feb 3, 2008 6:57 PM, john bryant <bryant.johan@xxxxxxxxx> wrote:

Any help with following mail will be great. I am using oprofile 0.9.2. Also, when i run"opreport -l" I get segmentation fault. Running "opreport"  works correctly. Any help will be great. I am using fedora core.


On Feb 1, 2008 11:06 AM, john bryant <bryant.johan@xxxxxxxxx> wrote:
Hi ,

I am getting following error when i try to run xenoprof

/usr/local/bin/opcontrol: line 1082: echo: write error: Invalid argument
Using 2.6+ OProfile kernel interface.
Reading module info.
Using log file /var/lib/oprofile/oprofiled.log
Daemon started.

what is this write error ?

Any help is really appreciated.


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