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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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To have the sampling driver installed, you need to re-start the install process under the root account or contact your administrator.

VTune – Wikipedia

Summary – Microarchitecture Exploration Window: You can also create a custom analysis type based on the hardware event-based sampling collection. You may need kernel header sources and other additional software to build and load the kernel drivers on Linux.

Cannot Open Data Error Message: Note For hardware event-based sampling types, the sampling interval serves as a simple SAV multiplier so that the default interval value of 1ms just leaves the SAV intact.

Inaccurate Sum in the Grid Problem: Cannot Find File Window: To restrict access, see the Driver permissions option below. Unless data is being collected by the VTune Amplifier, there will be no latency impact on system performance.

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Guessed Stack Frames Problem: Prerequisites for samplin target systems: Summary – Hotspots by Thread Intep Window: For example, your operating system limits on the maximum amount of files opened by a process as well as maximum memory mapped to a process address space still apply and may affect Perf-based profiling.

Summary – Memory Consumption Window: Event Count ijtel Hardware Events Window: When the VTune Amplifier collects an event, it attributes not only that event but the entire sampling interval prior to it often 10, to 2, events to the current code context.

Source Search Hot Keys Menu: Driver permissions [ default ] Change permissions for the driver. Cannot Open Data Error Message: Driver access group [ vtune default ]. Results may vtjne depending on the nature of the analysis and the code to which it is applied.

Driverless Event-Based Sampling Collection. The smaller the sampling interval, the larger the number of samples collected and written to disk. Retrieved from ” https: VTune Amplifier uses the hardware event-based sampling collector to collect data for the following analysis types:.

Sampling Drivers

Verify the driver configuration. Intel VTune Amplifier Pane: Source Search Hot Keys Menu: Inaccurate Sum in the Grid Problem: Summary – Hotspots by Thread Concurrency Window: Verify the sampling driver is installed.

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Event Count – Hardware Events Window: This reduces the number of interrupts and the number of samples collected and written inteo disk. Skipped Stack Frames Problem: Deprecated Tutorials The following tutorials are deprecated and have not been updated for the latest Intel VTune Amplifier release. Summary – Hotspots Window: In this case, you may either ignore hotspots showing an insignificant number of samples or switch to a higher granularity for example, function.

Building the Sampling Driver Prerequisites: Since it requires performance counters virtualization vvtune process, it can bring more overhead in comparison with system-wide collection. Copy the archive file from the installation directory to a writable directory or share on your system. The compiler should be available from the PATH environment. Graphics – Hotspots Window: 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.

Graphics – Hotspots Vtume To install the drivers: Sample Count – Hardware Events Window: