In message <187119B8-515D-4903-AAB5-05BF80215A4D at aimsys.nl> you wrote: > I did once ran lmbench on a proprietry 850 based board running at > 62/31 Mhz using 1 16-bit dram: > > Context switching - times in microseconds - smaller is better > ------------------------------------------------------------- > Host OS 2p/0K 2p/16K 2p/64K 8p/16K 8p/64K 16p/16K 16p/ > 64K > ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw > ctxsw > --------- ------------- ----- ------ ------ ------ ------ ------- > ------- > test Linux 2.4.25- 259.2 234.2 302.6 304.7 > > This is ~ 3x faster then your 100Mhz 885...
I just ran lmbench on a MPC866 system (CPU at 132 MHz, bus at 66 MHz): Context switching - times in microseconds - smaller is better ------------------------------------------------------------------------- Host OS 2p/0K 2p/16K 2p/64K 8p/16K 8p/64K 16p/16K 16p/64K ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw --------- ------------- ------ ------ ------ ------ ------ ------- ------- tqm8xx Linux 2.4.25 5.4500 27.5 30.3 39.0 36.0 37.7 33.5 There is definitely something wrong with Peter's measurements. Best regards, Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de Quantum particles: The dreams that stuff is made of.