Attach ITT APIs to a Launched Application
You can use the
Intel® VTune™
to attach to a running application instrumented with ITT API. But before launching the application, make sure to set up the following environment variable for the
Profiler
ittnotify_collector
:
On Windows*:
INTEL_LIBITTNOTIFY32=<
install-dir
>\bin32\runtime\ittnotify_collector.dllINTEL_LIBITTNOTIFY64=<
install-dir
>\bin64\runtime\ittnotify_collector.dllOn Linux*:
INTEL_LIBITTNOTIFY32=<
install-dir
>/lib32/runtime/libittnotify_collector.so INTEL_LIBITTNOTIFY64=<
install-dir
>/lib64/runtime/libittnotify_collector.soOn FreeBSD:
Header and library files are available from the
vtune_profiler_target_x86_64.tgz
FreeBSD target package. See
Set Up FreeBSD* System for more information.
INTEL_LIBITTNOTIFY64=<
target-package
>/lib64/runtime/libittnotify_collector.so The variables should contain the full path to the library without quotes.
Example
On Windows:
set INTEL_LIBITTNOTIFY32=C:\Program Files (x86)\Intel\oneAPI\vtune\latest\bin32\runtime\ittnotify_collector.dll
set INTEL_LIBITTNOTIFY64=C:\Program Files (x86)\Intel\oneAPI\vtune\latest\bin64\runtime\ittnotify_collector.dll On Linux:
export INTEL_LIBITTNOTIFY32=/opt/intel/oneapi/vtune/latest/lib32/runtime/libittnotify_collector.so
export INTEL_LIBITTNOTIFY64=/opt/intel/oneapi/vtune/latest/lib64/runtime/libittnotify_collector.soOn FreeBSD:
You may need to change the path to reflect the placement of the FreeBSD target package on your target system.
setenv INTEL_LIBITTNOTIFY64 /tmp/vtune_profiler_2021.9.0/lib64/runtime/libittnotify_collector.so
After you complete the configuration, you can start the instrumented application in the correct environment and
Intel® VTune™
will collect user API data even if the application was launched before the
Profiler
VTune
.
Profiler