Subject: Re: [Xen-users] Re: xenoprof
error
Anna,
Thanks for helping me. I am novice in Xen.
I have installed xen 3.0.4 and oprofile 0.9.2. Dom0 and DomU
kernel is 2.6.16.33-xen. Let us take a simple case when there is one VM
only. In this case, following is sequence of commands I
type:
> opcontrol --reset
> opcontrol --start-daemon
--event=CPU_CLK_UNHALTED:10000:0:1:1 --xen=/boot/xen-syms-3.0.4-1
--vmlinux=/boot/vmlinux-syms-2.6.16.33-xen --active-domains=0
I get following reply:
/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.
First question: what is
this invalid argument error ? Apparently, opcontrol starts and log
(/var/lib/oprofile/oprofiled.log) does not indicate any
error
Now, assuming oprofile started
correctly, I do some activity such as "ls" or run some of my C programs.
Then i follow this command sequence:
> opcontrol --dump
>
opreport
This gives following error (warning
seems ok as i have not given some of symbol files):
warning: /bridge could not be found.
warning: /ehci_hcd could not be found.
warning: /evdev could not be found.
warning: /ext3 could not be found.
warning: /jbd could not be found.
warning: /oprofile could not be found.
warning: /tg3 could not be found.
warning: /uhci_hcd could not be found.
warning: /usbcore could not be found.
warning: /xen-unknown could not be found.
CPU: Core 2, speed 1995.03 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with
a unit mask of 0x00 (Unhalted core cycles) count 100000
Segmentation fault
If I try
only "opreport" I get following output (I am giving partial output as it
seems ok):
CPU: Core 2, speed 1995.03
MHz (estimated)
Counted CPU_CLK_UNHALTED
events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted
core cycles) count 100000
CPU_CLK_UNHALT...|
samples|
%|
------------------
33557
14.8824 libfb.so
31884 14.1404
libmozjs.so
26669 11.8276
xen-syms-3.0.4-1
26373 11.6963
libgklayout.so
19726
8.7484
libc-2.5.so
18600 8.2490 vmlinux-syms-2.6.16.33-xen
8806 3.9054 libxpcom_core.so
8342 3.6996
libxpconnect.so
5327
2.3625 Xorg
CPU_CLK_UNHALT...|
samples| %|
So, why I am getting segmentation fault with "opreport -l" (
Second Question ). I am not sure what logs you may need or is there a way
i can detect the fault ? let me know any other information I can give
you.
Thanks again.
-John
On Feb 4,
2008 4:20 PM, Fischer, Anna <
anna.fischer@xxxxxx> wrote:
John,
Maybe you can post some more details on
what exactly you've been running, Xen version, Dom0 kernel version, how
exactly did you start xenoprofile and when exactly do you get the first
error? Also, please provide more detailed logs from the segmentation fault
that you see. That would be very
helpful.
________________________________
From:
xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:
xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of john
bryant
Sent: 04 February 2008 21:06
To:
xen-users@xxxxxxxxxxxxxxxxxxx;
xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: 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:
Hi.
For those who are new to xenoprof ( e.g. Todd), I have
installed xenorpof patch from following website (please follow the
instructions):
http://xenoprof.sourceforge.net/
For oprofile, I have downloaded from
http://oprofile.sourceforge.net/news/
I have used oprofile 0.9.2
-John
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,
Todd
On Feb 3, 2008 6:57 PM, john bryant <
bryant.johan@xxxxxxxxx> wrote:
Hi,
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.
-John
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.
-John
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