The Microarchitecture analysis group introduces analysis types that help you estimate how effectively you code runs on modern hardware.

  • Microarchitecture Exploration helps identify the most significant hardware issues affecting the performance of your application. Consider this analysis type as a starting point when you do hardware-level analysis.

  • Memory Access measures a set of metrics to identify memory access related issues (for example, specific to NUMA architectures).

Prerequisites:

It is recommended to install the sampling driver for hardware event-based sampling collection types. For Linux* and Android* targets, if the sampling driver is not installed, VTune Amplifier can work on Perf* (driverless collection). Be aware of the following configuration settings for Linux target systems:

  • To enable system-wide and uncore event collection that allows the measurement of DRAM and MCDRAM memory bandwidth that is a part of the Memory Access analysis type, use root or sudo to set /proc/sys/kernel/perf_event_paranoid to 0.

    echo 0>/proc/sys/kernel/perf_event_paranoid
  • To enable collection with the Microarchitecture Exploration analysis type, increase the default limit of opened file descriptors. Use root or sudo to increase the default value in /etc/security/limits.conf to 100*<number_of_logical_CPU_cores>.

    <user> hard nofile <100 * number_of_logic_CPU_cores>

    <user> soft nofile <100 * number_of_logic_CPU_cores>

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