Parallel Computing

Using Implicit Offload Copy from C function within Fortran code?

If one was to write a C function that allocated the memory and performed the offload operation, and it was called from within a Fortran code (so, ostensibly compiled with icc then ifort), could it utilize Implicit Copy, which is only set up for C/C++?

Monitoring Intel® Transactional Synchronization Extensions with Intel® PCM

After applying a new technology (a new processor, a hardware accelerator, a new instruction, etc) besides measuring the immediate performance delta one requires a method to verify that this technology has been applied correctly and efficiently. Intel® Transactional Synchronization Extensions (Intel® TSX - instructions for speculative execution of critical sections protected by locks) are not an exception here.

June 2013 announcements: Acceleware, Bright Computing

Several announcements were made on or during the ISC'13 conference.   Of note are a couple of announcements from Acceleware and Bright Computing:

 

Accelewarehttp://www.acceleware.com/press-release/acceleware-showcases-high-performance-optimization-techniques-isc-2013

Segmentation Fault with WRF

I have compiled WRF v3.5 in (dm+sm) par mode with all necessary libraries for Intel MIC.

I am getting the error "APPLICATION TERMINATED WITH THE EXIT STRING: Segmentation fault (signal 11)" when executed with mpirun as "mpirun -host localhost-mic0 -n 1 ./wrf.exe"

but when run the executable (./wrf.exe) by logging into the card, the executable runs without any problem provided ulimit is set to unlimited.

So, I tried changing the environment variable KMP_STACKSIZE on the host, to different values and i still have the same seg fault issue.

ICC can't open header file? (Catastrophic Error)

Hi there,

I've got an issue when compiling Mozilla (64-Bit) where it cannot find a specific header file even though it is present and all the other header files are being found in that directory:

c:/Users/Alex/Downloads/mozilla-beta/media/webrtc/trunk/webrtc/system_wrappers/source/critical_section_win.h(15): catastrophic error: cannot open source file "webrtc/system_wrappers/interface/critical_section_wrapper.h"

  #include "webrtc/system_wrappers/interface/critical_section_wrapper.h"

print zmm register in debugger

Hi,

I get a curious crash on a vpgatherdd call and was trying to debug it. But I'm stuck because I can't figure out how idbc works. I'm used to gdb, so I thought this wouldn't be too hard. But:

  • disasm doesn't work
  • print %zmm0 (and all other zmm registers) doesn't work: prints "void"
  • there is no register view (like "layout regs" in gdb)
  • there is no asm view (like "layout asm" in gdb)

Is this a known limitation? How do you debug your MIC programs?

Cheers,

  Matthias

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