0 Replies Latest reply on Oct 5, 2007 6:23 PM by "jmattclark

    fft with openmp

    "jmattclark
      gives segmentation fault

      Attempting to build the zfft... examples on acml4.0 -
      zfft1dx, zfft1mx each cause segmentation fault

      zfft1d seems to run, but if I increase the FFT size >32, it also segfaults.

      The fault occurs on the forward fft....

      Any ideas?

      System is
      [root@abh283 ~]# cat /proc/cpuinfo
      processor : 0
      vendor_id : AuthenticAMD
      cpu family : 15
      model : 43
      model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
      stepping : 1
      cpu MHz : 1000.000
      cache size : 512 KB
      physical id : 0
      siblings : 2
      core id : 0
      cpu cores : 2
      fpu : yes
      fpu_exception : yes
      cpuid level : 1
      wp : yes
      flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy
      bogomips : 2009.86
      TLB size : 1024 4K pages
      clflush size : 64
      cache_alignment : 64
      address sizes : 40 bits physical, 48 bits virtual
      power management: ts fid vid ttp

      processor : 1
      vendor_id : AuthenticAMD
      cpu family : 15
      model : 43
      model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
      stepping : 1
      cpu MHz : 1000.000
      cache size : 512 KB
      physical id : 0
      siblings : 2
      core id : 1
      cpu cores : 2
      fpu : yes
      fpu_exception : yes
      cpuid level : 1
      wp : yes
      flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy
      bogomips : 2009.86
      TLB size : 1024 4K pages
      clflush size : 64
      cache_alignment : 64
      address sizes : 40 bits physical, 48 bits virtual
      power management: ts fid vid ttp

      Fedora Core 7, gcc4.1.2