INTEL VTUNE SAMPLING PDF

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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Event Count – Hardware Events Window: The sampling interval is used to calculate the target number of samples and the Sample After value SAV. Sampling driver downloads are available from https: Each group consists of events that can be collected simultaneously. Graphics – Hotspots Window: You may set your own group during installation in the Advanced options or change it manually after installation by executing: Skipped Stack Frames Problem: Options – General Pane: Summary – Hotspots by Thread Concurrency Window: Copy the results to the Windows host system and view the collected data with VTune Amplifier.

The script output helps recognize limitations and provides advice on fixing them. You can also create a custom analysis type based on the hardware event-based sampling collection.

Unless the data is being collected by the VTune Amplifier, there will btune no latency impact on the system performance.

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Bandwidth – Platform Power Analysis Window: Skipped Stack Frames Problem: Installing the Sampling Drivers Nitel for remote target systems: Deprecated Tutorials The following tutorials are deprecated and have not been updated for the latest Intel VTune Amplifier release.

Hardware Event-based Sampling Collection

If required, build and install the driver. This article relies too much on references to primary sources. Options – Result Location Pane: If the uncore events support is available on the system, the VTune Amplifier also uses the Perf collection for Memory Access, HPC Performance Characterization, and Microarchitecture Exploration analysis types with the Analyze memory bandwidth option enabled.

Driver access group [ vtune default ] Set the driver access group ownership to determine which set of users can perform the collection on the system.

Tutorials and Samples

Increasing the sampling interval may be useful for sampllng with long durations or profiles that create large results. Bottom-up – Memory Usage Window: Driver build options …. Options – Result Location Pane: Your screens may vary from the screen shots shown throughout these tutorials.

VTune Amplifier uses the hardware event-based sampling collector to collect data for the following analysis types:.

Summary – Hardware Events Window: By using this site, you agree to the Terms of Use and Privacy Policy. Graphics – Hotspots Window: Share Samplling Share Send.

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When the filtering is on, the collector gathers data only for the processes spawned by the user who started the collection. Options – Result Location Pane: Performance Analysis Cookbook For end-to-end tuning and configuration use cases, explore the VTune Amplifier Performance Analysis Cookbook that introduces such recipes as: It has both a graphical user interface GUI and command line and comes in versions for Linux or Microsoft Windows operating systems.

Analysis Limitations Perf-based driverless collection is applicable to all hardware event-based sampling analysis types, such as Hotspots hardware event-based sampling modeMicroarchitecture Exploration, and Custom event-based sampling analysis types on Linux and Android OS.

Summary – Locks and Waits Window: Identify the hardware-related issues in your application such as data sharing, cache misses, branch misprediction, and vtuen. Sample Count – Hardware Events Window: Options – General Pane: It is available as part of Intel Parallel Studio or as a stand-alone product.

Driver permissions [ default ]. Project Navigator Context Menus: Verifying Kernel Configuration To verify kernel configuration: For a big number of samples, this sampling error does not have a serious impact on the accuracy of performance analysis and the final statistical picture is still valid.