[Cbe-oss-dev] CELL SDK 2.1's dmabench + 2.6.23-rc3 (geoff/ps3-linux.git) = ps3 hangs

[Goffredo Marocchi]

Update: if I run the program dmabench with the environment variable
SPE_DEBUG_START set to 1 the program does not crash anymore even when
running it with 5 SPE's, yet if we do not set that variable the
program crashes the PS3.

[root at IGGS-PS3 dma]# SPU_DEBUG_START=1 ./dmabench --numspes 5 seqdmar
Time base frequency measured as = 79.796 MHz
All SPEs completed successfully!
dmabench results: seqdmar numspes=5 numreqs=1 entrysize=128
   dma_size         ticks       pclocks     microsecs     aggr GB/s
------------  ------------  ------------   -----------  ------------
          8          12.7           508          0.16        0.2519
         16          12.6           506          0.16        0.5053
         32          12.6           504          0.16        1.0146
         64          12.7           507          0.16        2.0179
        128          12.6           505          0.16        4.0486
        256          13.3           533          0.17        7.6762
        512          14.4           575          0.18       14.2334
       1024          16.1           643          0.20       25.4457
       2048          19.4           777          0.24       42.1670
       4096          49.1          1967          0.61       33.3161
       8192         124.0          4971          1.55       26.3670
      16384         252.5         10127          3.16       25.8838
[root at IGGS-PS3 dma]# echo $SPU_DEBUG_START

[root at IGGS-PS3 dma]# ./dmabench --numspes 5 seqdmar
Time base frequency measured as = 79.796 MHz