Intel® VTune™ Amplifier uses kernel drivers to enable hardware event-based sampling and collect event-based sampling data from. During the hardware event-based sampling (EBS), also known as analysis in the sampling mode, the Intel® VTune™ Amplifier profiles your. To enable hardware event-based sampling analysis on your platform, the Intel® VTune™ Amplifier uses sampling drivers that require root.

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Driverless Event-Based Sampling Collection

Skipped Stack Frames Problem: Intel VTune Amplifier Pane: If you are building the sampling drivers from a fresh kernel source and want to use it for an existing target system, get the original key files and sign the sampling driver with the original key.

To determine an appropriate sampling interval, consider the duration of the collection, the speed of your processors, and the amount of software activity. Troubleshooting and Tips topic at https: If you loaded the drivers but do not use them and no collection is sapling, there is no execution time overhead of having vtunw drivers loaded. Options – Result Location Pane: Cannot Find File Window: To have the vtund driver installed, you need to re-start the install process under the root account or contact your administrator.


The number of hardware events Performance Monitoring Counters that can be collected simultaneously is limited by CPU capabilities. Share Tweet Share Send. Driverless Perf system-wide counting provides event counting statistics performed by one monitoring process for the whole system over an interval.

Be aware of the following configuration settings for Linux target systems:. Cannot Find File Window: The script builds the drivers with a specified vtunw for a specific kernel version.

Options – Result Location Pane: Project Navigator Context Menus: Note If there is no collection in progress, there is no execution time overhead of having the driver loaded and very little overhead for memory usage.

Tutorials and Samples

Summary – Locks and Waits Window: After installation, you can use the respective -vars. Unexpected Paused Time Problem: Graphics – Hotspots Window: Event Count – Hardware Events Window: Please help improve it or discuss these issues on the talk page. Usually, it is no more than four events.

Guessed Stack Frames Problem: Cannot Find File Window: Increasing the sampling interval may be useful for profiles with long durations or profiles that create large results. Prerequisites for remote Linux target systems: Share Tweet Share Send.

Driverless Event-Based Sampling Collection

Bandwidth – Platform Power Analysis Window: Set the driver access group ownership to determine which set of users can perform the collection on the system. Intel VTune Amplifier Pane: This reduces the number of interrupts and the number of samples collected and written to disk.


Install boot script [ yes default ]. Summary – Locks and Waits Window: Select sticky button color: Share Tweet Share Send. Options – General Pane: Guessed Stack Frames Problem: Specify the location of the kernel header files on this system, the path and name of the C compiler to use for building the driver, the path and name of the make command to use for building the driver.

Kernel development sources required for driver rebuild should correspond to the Linux kernel update. If the system has installed VTune Amplifier boot scripts to load the drivers into the kernel each time the system is rebooted, the drivers will be automatically re-built by the boot scripts at system boot time. intsl

Platform Power Analysis Window: See Also Sampling Drivers.