On Sun, Jun 15, 2003 at 11:06:38PM +0800, Shenrong wrote: > size to 512k or 256k, but don't know why. We use both the PBGA and > CBGA packages, seems CBGA version are some more stable(still has problem), > don't know why too.
The first thing I thought of when I read this is heat issues -- especially because of the mention of PBGA vs. CBGA. Is your heat sinking/cooling adequate? I had a problem once with a custom 405GP board that was not entirely dissimilar. Running the OpenSSL 'speed' benchmark, the system would lock up doing the MD2 tests. I couldn't fathom how a userland program could lockup the entire system. One day, just by chance, I happened to stand the board on end -- no more crashes. The difference had been the airflow underneath the device because it didn't have a heatsink on it. Consequently, I put a heatsink on the 405 and that fixed the problem altogether. > It's more strange that I can simply let the error occur under Linux with > continuous file copying in ram disk. But I can't let it occur under PPCBoot > with whatever memory operations for even one time, whether use the L2 Cache > memory as L2 Cache or as private memory. The L2 Cache has the same setting > in the above two circumstances. The only difference I could think of right away here is that under Linux, you're doing burst reads and writes. --Chris ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
