Disable kmp_affinity warnings

[aurora]

Hi,

I'm doing a graphic application that also uses OpenMP. This application has que linker flag /SUBSYSTEM:WINDOWS in order to not create an additional command line window. The problem is that in non-Intel cpu, the kmp_affinity warning is opening the command line window to show the message.

How can I manage this? The only thing I can't do is to change general environment variables ( other programs could be using openmp).

Thanks in advance!

[Vladimir_P_1234567890]

will this workaround work for you?

https://software.intel.com/en-us/articles/bogus-openmp-kmp-affinity-warnings-on-non-intel-processor-hosts

--Vladimir

[aurora]

Hi,

No, I can't change users (clients) general environment variables.

[Vladimir_P_1234567890]

can't you use kmp_set_defaults() function in your program? it does not affect an environment outside the program.

--Vladimir

[aurora]

The warning message is shown before my main function starts, I think when the openmp library does the dynamic loading

[Andrey_C_Intel1]

Can you update the compiler?  This problem was fixed more than 2 years ago in compiler 12.1 update 9.

- Andrey

[aurora]

I'm using 13.0 version and the KMP_affinity message is shown as well

[pbkenned1]

This was fixed in the 13.0 OMP runtime library in late May of 2012.  Exactly what version of 13.0 are you using?  Can you please 'set KMP_VERSION=1' in your environment, run your application, and let us know what the 'OMP Version' is?

On Linux, I know this is fixed in the last 13.0 update, so you may need to update to the equivalent 13.0 Windows compiler.

Patrick

[aurora]

Hi,

The compiler I'm using is "Intel(R) C++ Intel(R) 64 Compiler XE on Intel(R) 64, version 13.1.3 Package ID: w_ccompxe_2013.5.198"

Which is exactly the bug? The KMP_AFFINITY warning dissappears when I do set KMP_AFFINITY=none

With KMP_VERSION=1 ( using the binaries on an Intel processor, not AMD): 

 Intel(R) OMP Copyright (C) 1997-2011, Intel Corporation. All Rights Reserved.

Intel(R) OMP version: 5.0.20110823
Intel(R) OMP library type: performance
Intel(R) OMP link type: dynamic
Intel(R) OMP build time: 2011-08-31 12:43:20 UTC
Intel(R) OMP build compiler: Intel C++ Compiler 12.0
Intel(R) OMP alternative compiler support: yes
Intel(R) OMP API version: 3.0 (200805)
Intel(R) OMP tracefile support: no
Intel(R) OMP dynamic error checking: no
Intel(R) OMP helper thread support: yes
Intel(R) OMP thread affinity support: not used
Intel(R) OMP debugger support version: 1.1

I think I'm using the wrong OMP version. Let me check it...

[pbkenned1]

There's a mismatch between the compiler version you are using and the OMP runtime that is getting loaded by your application. 

icl-13.1.3.198 (package w_ccompxe_2013.5.198.exe) contains Intel(R) OMP version: 5.0.20130507, but you are picking up Intel(R) OMP version: 5.0.20110823, which doesn't have the fix.  You'll have to correct $Path and $LIB to make sure the runtime for 13.1.3.198 is picked up.

Patrick

C:\OpenMP\Examples\NT>icl -Qopenmp matmul2_GetProcessTimes.cpp
Intel(R) C++ Intel(R) 64 Compiler XE for applications running on Intel(R) 64, Version 13.1.3.198 Build 20130607
Copyright (C) 1985-2013 Intel Corporation.  All rights reserved.

matmul2_GetProcessTimes.cpp
Microsoft (R) Incremental Linker Version 11.00.50727.1
Copyright (C) Microsoft Corporation.  All rights reserved.

-out:matmul2_GetProcessTimes.exe
-defaultlib:libiomp5md.lib
-nodefaultlib:vcomp.lib
-nodefaultlib:vcompd.lib
matmul2_GetProcessTimes.obj

C:\OpenMP\Examples\NT>matmul2_GetProcessTimes.exe

 Using clock() for wall clock time
 Problem size: c(900,3600) = a(900,1800)*b(1800,3600)
 Calculating product 1 time(s)
 GetCurrentProcessId = 3484

Intel(R) OMP Copyright (C) 1997-2013, Intel Corporation. All Rights Reserved.
Intel(R) OMP version: 5.0.20130507