Error in Zhetrd

fdahm · Post by **fdahm** » Fri May 06, 2011 9:13 am

Hi everyone,
I've just got the RC5 and quickly test it/
zheevd test failed immedialtly on GPU.


fdahm@hostname$ ./testing_zheevd 
device 0: Tesla T10 Processor, 1440.0 MHz clock, 4095.8 MB memory
device 1: Tesla T10 Processor, 1440.0 MHz clock, 4095.8 MB memory

Usage: 
  testing_zheevd -N 1024

  N     CPU Time(s)    GPU Time(s)     ||R||_F / ||A||_F
==========================================================
!!!! device memory allocation error (magma_zhetrd)
 1024       1.94           0.06         9.997928e-01 1.416408e+00
!!!! device memory allocation error (magma_zhetrd)
!!!! device memory allocation error (magma_zhetrd)
 2048      14.59           0.22         1.000000e+00 1.407825e+00
!!!! device memory allocation error (magma_zhetrd)
!!!! device memory allocation error (magma_zhetrd)

It was quite surprising since dsyevd seems to work on larger sizes :

Code: Select all


fdahm@hostname$ export OMP_NUM_THREADS=8
fdahm@hostname$ ./testing_dsyevd 
device 0: Tesla T10 Processor, 1440.0 MHz clock, 4095.8 MB memory
device 1: Tesla T10 Processor, 1440.0 MHz clock, 4095.8 MB memory

Usage: 
  testing_dsyevd -N 1024



  N     CPU Time(s)    GPU Time(s)     ||R||_F / ||A||_F
==========================================================
 1024       0.20           0.21         0.000000e+00 2.032047e-15
 2048       1.13           2.29         4.029430e-16 1.301235e-13
 3072       4.14           6.78         1.289584e-15 1.209237e-13
 4032      10.08          13.66         1.470782e-15 8.296081e-13
 5184      19.48          27.62         1.140209e-16 4.902029e-13
 6016      28.12          43.55         2.880718e-16 3.232392e-13
 7040      47.90          68.72         9.200947e-17 3.496469e-14