Hi,
In my environment, this works perfectly fine.
Although I have checked actual speed, it would be much faster.
I used icc and OMP_NUM_THREADS is set to 4.
FYI, please create Makefiles like this and recompile all tools
ICC: ./configure CC=icc F77=ifort CFLAGS="-O2 -static-intel -openmp" FFLAGS="-O2 -static-intel -openmp"
GCC: ./configure CFLAGS="-O2 -fopenmp" FFLAGS="-O2 -fopenmp"
Please note that you should include '-O2' as welll as '-fopenmp',
otherwise your binary does not have any optimization process.
Regards,
Junichi Yamagishi
CSTR
On 6 Apr 2009, at 00:48, Heiga ZEN (Byung Ha CHUN) wrote:
Hi,
kangshiyin@xxxxxxxxx wrote (2009/04/03 10:08):
i have tried these 2 patches. the fastHHEd.patch works well,
but the HHEd.c.patch seems not so good.
it is even slower after this patch is used on my computer.
and i find that all other programs such as HInit & HRest become slower if the -fopenmp flag is applied when compiling.
my compiler is gcc4/Fedora9
is this gcc or openmp's problem? should i use icc or something else?
This sounds strange. HInit & HRest should not be affected by this modification because they have no OpenMP directives. So I believe that this is the problem of gcc4 or running environment rather than my HHEd.c.patch.
Note that you need to set the Linux environmental variable OMP_NUM_THREADS (the number of threads to be generated) to a proper value. For example, if your PC has 4 cores, OMP_NUM_THREADS should be less than 4. Otherwise, it sometimes becomes slower because of overhead while generating threads.
Best regards,
Heiga ZEN (Byung Ha CHUN)
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Heiga ZEN (Byung Ha CHUN)
Speech Technology Group
Cambridge Research Lab
Toshiba Research Europe
phone: +44 1223 436975
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