Intel® VTune™ Amplifier XE

Help: L2 cache load hit rate is negative in the sampling data.

I collected some sampling data for kernel functions in Linux kernel 2.6.9 using VTune RDC, I found one hotspot function even has a negative L2 load hit rate (-37.289), it does have very high L2 cache miss per instruction (1.373) though. Is that possible?

Thanks,

L.Y.

Message Edited by mfcking@yahoo.com on 06-10-2005 09:57 AM

Hot off the presses! (Intel Press, that is...)

Hey folks,

It occurred to me that the readers of this forum may not know about Intel Press, which writes some pretty amazing books. They just released a new VTune book which looks pretty impressive in its scope and I am NOT saying that just cuz I have a spiffy signed copy of it right here at my desk.

Check it out:

"VTune Performance Analyzer Essentials -- Measurement and Tuning Techniques for Software Developers" by James Reinders.

Hot off the presses: "VTune(TM) Performance Analyzer Essentials"

Hey folks,

It occurred to me that the readers of this forum may not know about Intel Press, which writes some pretty amazing books.

They just released a new VTune book which looks pretty impressive in its scope and I am *NOT* saying that just cuz I have a spiffy signed copy of it right here at my desk...

...check it out:

"VTune Performance Analyzer Essentials -- Measurement and Tuning Techniques for Software Developers" by James Reinders.

Installation on nonsupported distro (Gentoo)...

I'm trying to install VTune 3.0 on Gentoo Linux (kernel 2.6.11.11, P4 2.8G HT.)

Downloaded the tar file, untarred, and invoked ./install.
After accepting some license agreements, it stops saying:

ERROR: unable to find command chkconfig
Please add the location to the above commands to your PATH and re-run the script

I know chkconfig on Redhat, but Gentoo doesn't use/have it. Then I tried by editing config.ini;

NONSUPPORTEDINSTALL=Yes

But in vain. Nothing has changed. What can I do?

Thanks in advance!

Base Relocation Problem (New User)

Hello,

I am trying to use VTune for the first time. I am working with IVF 8.1.030 and VTune 7.2 on IA-32.

Step #1
I installed VTune from CD and then performed the upgrade which came out in the first week of June; this amounted to copying a couple files.

Step #2
I walked through the supplied VTune example project, which is based on a simple C project. Works great. Pretty call graphs.

How to use VTune for PXA270

I have installed VTune 7.2 and I have a Dell AXIMX50 with PXA270 processor. The OS is Windows Mobile 2003 Second Edition. I wonder how I can use VTune to measure the performance of my PDA. I tried all three methods (IRDC, TLDC, SRDC)that mentioned in the help document and none of them works. Is Dell AXIM X50 support Vtune?

Thanks for help!

Message Edited by k.kun.wang@gmail.com on 06-06-2005 11:32 AM

Message Edited by k.kun.wang@gmail.com on 06-06-2005 11:36 AM

Clocktick issues in two xeon cpu system.

Hi,
I am running RH Linux EL 4.0 with two xeon cpus. After the sampling is done, I added the clockticks of cpu0 to the clockticks of cpu1 and find the sum is much higher than total clockticks. The same thinghappens to the L2 load miss rate. Any idea about this problem?
Thanks a lot,
Liang

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