New VTune 8.0 causes more overhead than ever.

[mfcking]

Hello,

I installed the latest VTune analyzer 8.0 and VTune rdc. After I did several profiling, I found this new version causes more overhead than the old one.

Here is the summary for the overhead caused by VTune:

Samp_Write_PC_File about 15% clock ticks

Prepare_Wait about 8% clockticks

Finish_To_Wait about 8% clock ticks

I remember the old VTune 7.2 caused 20~25% overhead and the older older VTune consumes only 5% overhead. I don't understand why VTune cause so much overhead. I was told vtl will be better and SEP will be better than vtl. It seems I have to use SEP now.

L.Y.

Message Edited by mfcking@yahoo.com on 02-15-2006 01:08 PM

[Intel_C_Intel]

Hi

If you are describing the overhead caused by the GUI, try the same thing using the command line and see if you get the same results. There is more overhead when you use the gui.

Cheers,

JackD