Hi, >Generally Linux expects the boot firmware to set up the L2 and L3 caches >on PowerPC machines. Are you quite sure (from benchmark timings) that >the L2 cache is not working? The MVME3604 has an L2 cache outside the >processor, and it should work transparently. First the /proc/cpuinfo file contains the following informations: processor : 0 cpu : 604r clock : 400MHz revision : 49.2 (pvr 0009 3102) bogomips : 399.76 machine : PReP MVME 3600 with MVME761 l2 cache : none simms :
I did the following test on this machine afte which I decided that the L2 cache is not used. I have a test program on VxWorks which takes about 110 ms for execution on the MVME3604 with enable L2 cache I ported this application to a RTAI module and did the test on linux and it took about 420ms So i disabled the L2 cache in VxWorks and did the test again and then it took with VxWorks about 417ms. After this and because of the content from /proc/cpuinfo I decided that the L2 cache is not used. BTW I am using kernel 2.4.25 Best regards, Johannes ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
