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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Summary – Microarchitecture Exploration Window: Verify the sampling driver is installed. Share Tweet Share Send.
After installation, you can use the respective -vars. It is recommended to install the sampling driver for hardware event-based sampling collection types. A regular user cannot change the mode after the product is installed.
Intel® VTune™ Amplifier Sampling Driver Downloads | Intel® Software
itnel 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.
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.
Prerequisites for Driverless Collection VTune Amplifier can use the driverless Perf-based collection if the following requirements are satisfied: Identify where your application is spending time, detect the most time-consuming program units and how they were called. For more complete information about compiler optimizations, see our Optimization Notice.
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. Each group consists of events that can be collected simultaneously. Platform Power Analysis 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.
Usually, it is no more than four events. Summary – Platform Power Analysis Window: Once enabled by the administrator during the installation, this mode cannot be turned off by a regular user, which is intentional to preclude individual users from observing the performance data over the whole node including activities of other users.
VTune Amplifier provides the following options: Install the hardware event-based collector driver with the per-user filtering on.
The script builds the drivers with a specified cross-compiler for a specific kernel version. Bottom-up – Memory Usage Window: Analysis types that use the hardware event-based sampling collector are limited to only one collection allowed at a time on a system.
Driverless Event-Based Sampling Collection
The following additional limitations are also possible for the driverless collection: Be aware of the following configuration settings for Linux target systems:. Guessed Stack Frames Problem: Bottom-up – Memory Usage Window: By default, the VTune Amplifier collector samples your target and does not analyze execution paths.
Source Search Hot Keys Menu: For user-mode sampling and tracing typesspecify a number in milliseconds between 1 and See Also Sampling Drivers. Options – General Pane: Cannot Find File Window: Depending on your target system, you can manage the sampling drivers as sqmpling Share Tweet Share Send. You may set your own group during installation in the Advanced options or change it manually after installation by executing: Summary – Microarchitecture Exploration Window: VTune Amplifier provides the following options:.
The smaller the sampling interval, the larger the number of samples collected and written to disk. Summary – Microarchitecture Exploration Window: Copy the results to the Windows host system and view the collected data with VTune Amplifier. Unexpected Paused Time Problem: