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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Once enabled by the administrator during the installation, this mode cannot be turned off by a regular user, which is intentional to preclude samplng users from observing the performance data over the whole node including activities of other users. Load driver [ yes default ].

Load driver [ yes default ] Load the driver into the kernel.

Sampling Drivers

Skipped Stack Frames Problem: When it is off defaultsamples from all processes on the system are collected. Prerequisites for all Linux systems: Summary – Hotspots by Thread Concurrency Window: The minimal value of the sampling interval for sampking user-mode sampling and tracing collection depends on the system:. It has both a graphical user interface GUI samplinng command line and comes in versions for Linux or Microsoft Windows operating systems.

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Build and Install the Sampling Drivers for Linux* Targets

Summary – Memory Usage Window: Increasing the sampling interval may be useful for profiles with long durations or profiles that create large results. This reduces the number of interrupts and the number of samples collected and written to disk. samplkng

Extract the sample from the archive. This example uses the following options:.

Summary – Memory Consumption Window: Samplkng determine an appropriate sampling interval, consider the duration of the collection, the speed of your processors, and the amount of software activity. Root privileges are required. If the option is not specified, the host GCC compiler is used for the build.

Build and Install the Sampling Drivers for Linux* Targets

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Guessed Stack Frames Problem: Sample Count – Hardware Events Window: Samplihg – Result Location Pane: For more complete information about compiler optimizations, see our Optimization Notice. Alternatively, build the new kernel and flash it to the target device so the target device uses your kernel build. The sampling interval value of 10ms multiplies the SAV for all events by 10 making them overflow 10 times less frequently.

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Make sure the following options are enabled in the kernel configuration for hardware event-based sampling EBS collection:. Skipped Stack Frames Ontel Options – Result Location Pane: Install the driver, if required. Source Search Hot Keys Menu: To install the driver that is built with the per-user event-based sampling collection on, use the -pu -per-user option as follows:.

Source Search Hot Keys Menu: Views Read Edit View history. You can access the sample code at https: Check whether the sampling drivers are installed: To overcome this limitation, the VTune Amplifier splits the event list into several event groups.

VTune – Wikipedia

Summary – Memory Usage Window: By default, the VTune Amplifier collector samples your target and does not analyze execution paths. If required, build and install the vtjne.

Skipped Stack Frames Problem: