Intel® VTune™ Amplifier XE and Intel® VTune™ Amplifier for Systems Help
SGX Hotspots analysis type is targeted for systems with Intel Software Guard Extensions (Intel SGX) feature enabled. It uses the INST_RETIRED.PREC_DIST hardware event that emulates precise clockticks and helps identify performance-critical program units inside security enclaves. Using the precise event is mandatory for the analysis on the systems with the Intel SGX enabled because regular non-precise events do not provide a correct instruction pointer and therefore cannot be attributed to correct modules.
Syntax:
$ amplxe-cl -collect sgx-hotspots [-knob <knobName=knobValue>] [--] <target>
Knobs: sampling-interval, enable-user-tasks.
For the most current information on available knobs (configuration options) for the SGX Hotspots analysis, enter:
$ amplxe-cl -help collect sgx-hotspots
Example:
The following example shows how to run the SGX Hotspots Analysis on myApplication:
$ amplxe-cl -collect sgx-hotspots -- home/test/myApplicationWhen the data collection is complete, do one of the following to view the result:
Use the -report action to view the data from command line.
Use the -report-output action to write report to a .txt or .csv file
Open the data collection result (*.amplxe) in the VTune Amplifier graphical interface.