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

[Goffredo Marocchi]

The crash seems to occur when going over 4 SPE's used in the DMA test:

[root at IGGS-PS3 dma]# ./dmabench --numspes 2 dmalistrw
Time base frequency measured as = 79.801 MHz
All SPEs completed successfully!
dmabench results: dmalistrw numspes=2 numreqs=2 entrysize=128
   dma_size         ticks       pclocks     microsecs     aggr GB/s
------------  ------------  ------------   -----------  ------------
        128           7.2           286          0.09        5.7144
        256           7.8           310          0.10       10.5440
        512           9.6           383          0.12       17.0686
       1024          14.2           570          0.18       22.9701
       2048          22.5           903          0.28       29.0030
       4096          37.6          1507          0.47       34.7866
       8192          69.5          2786          0.87       37.6246
      16384         127.0          5094          1.59       41.1684
      32768         247.3          9917          3.10       42.2911
      65536         487.6         19554          6.11       42.8995
[root at IGGS-PS3 dma]# ./dmabench --numspes 3 dmalistrw
Time base frequency measured as = 79.801 MHz
All SPEs completed successfully!
dmabench results: dmalistrw numspes=3 numreqs=2 entrysize=128
   dma_size         ticks       pclocks     microsecs     aggr GB/s
------------  ------------  ------------   -----------  ------------
        128           6.9           276          0.09        8.8950
        256           7.6           303          0.09       16.1920
        512           9.4           375          0.12       26.1537
       1024          15.5           623          0.19       31.5573
       2048          25.4          1016          0.32       38.6769
       4096          46.5          1864          0.58       42.1789
       8192          91.8          3682          1.15       42.7071
      16384         174.2          6984          2.18       45.0388
      32768         346.8         13906          4.35       45.2401
      65536         697.8         27981          8.74       44.9683
[root at IGGS-PS3 dma]# ./dmabench --numspes 4 dmalistrw
Time base frequency measured as = 79.801 MHz
All SPEs completed successfully!
dmabench results: dmalistrw numspes=4 numreqs=2 entrysize=128
   dma_size         ticks       pclocks     microsecs     aggr GB/s
------------  ------------  ------------   -----------  ------------
        128           7.2           289          0.09       11.3141
        256           7.7           308          0.10       21.2318
        512           9.4           377          0.12       34.7358
       1024          13.6           545          0.17       48.0771
       2048          20.7           828          0.26       63.2997
       4096          47.2          1892          0.59       55.4065
       8192         113.9          4567          1.43       45.9099
      16384         225.9          9057          2.83       46.3052
      32768         447.7         17951          5.61       46.7298
      65536         903.4         36224         11.32       46.3145
[root at IGGS-PS3 dma]# ./dmabench --numspes 5 dmalistrw
Time base frequency measured as = 79.801 MHz