Symptoms

Cause

Possible Solution

Change the stackwalk mode from offline (after collection) to online (during collection):
From the

Intel Advisor

GUI: Go to

Project Properties

Analysis Target

Survey Hotspots Analysis

Advanced

Stack unwinding mode and select

and select

During collection

drop-down option.

From the command line interface (CLI): Use the

--stackwalk-mode=online

option. For example:

advisor --collect=survey --project-dir=./myAdvisorProj --stackwalk-mode=online -- ./bin/myTargetApplication
This option increases analysis overhead.
Decrease the optimization level of your project and rebuild the target. For example, with the
Intel® C++ Compiler Classic
or the
Intel® oneAPI
DPC++/C++
Compiler
, use the following options:
Request moderate optimization:
On Linux* OS and macOS*: use
O2
or lower
On Windows* OS: use
/O2
or lower
Disable compiler inlining:
On Linux OS and macOS: use
-fno-inline
On Windows OS: use
/Ob0
Disable interprocedural optimization:
On Linux OS and macOS: use
-no-ipo -no-ip
On Windows OS: use
/Qipo- /Qip-
Consider also using the following options:
Select the maximum level of debug information:
On Linux OS and macOS: use
-g[n]
On Windows OS: use
Zi, Z7, ZI
To generate additional debug information in the object file, use
-g3
or
ZI
.
Set a maximum number of times to unroll loops:
On Linux OS and macOS: use
-unroll[=n]
On Windows OS: use
/Qunroll[:n]
To tell the compiler not to unroll loops, use
-unroll=0
or
/Qunroll:0
.