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vtune profile qemu (modified), but "The application uses the notification signal for its own needs"

peng_wp
Beginner
‎07-16-2012 07:53 PM
397 Views
Hi.
I tried to use vtune (Intel VTune Amplifier XE 2011 Update 9 (build 229127)) to profile a modified qemu on linux (kernel version: 3.3.7). but vtune reported: "vtune amplifier The application uses the notification signal for its own needs", and vtune thoughts the profile was over, but in fact it had profiled nothing.
I also used vtune to profile qemu which was not modified, and it could work well.
In our modified qemu, we have used the SIGRTMIN, SIGRTMIN+1,SIGRTMIN+2,SIGRTMIN+3,SIGRTMIN+4.
Dose this mean the signals above vtune also uses? and how can I use vtune to profile our modified qemu?
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Peter_W_Intel
Employee
‎07-16-2012 08:10 PM
397 Views
Possibly interruptionsare used byVTune, I guess.
Can you use hotspots instead of lightweigtht-hotspots? It profiles your qemu.exe in user-mode.
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