User Guide

Contents

Error Message: Scope of
ptrace
System Call Is Limited

Full error message:
Failed to start profiling because the scope of ptrace() system call application is limited. To enable profiling, please set /proc/sys/kernel/yama/ptrace_scope to 0. See the Release Notes for instructions on enabling it permanently.
This is a Linux* only message.

Cause

VTune Amplifier may fail to collect data for Hotspots and Threading analysis types on the Ubuntu* operating system if the scope of
ptrace()
system call application is limited.

Solution

To workaround this problem for the current session, set contents of the
/proc/sys/kernel/yama/ptrace_scope sysctl
file to 0.
To make this change permanent, set the
kernel.yama.ptrace_scope
value to 0 in the
/etc/sysctl.d/10- ptrace.conf
file using root permissions and reboot the machine.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804