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).
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>