Hi all, We've run LmBench in our MPC8255 custom board running a recent linuxppc_2_4 revision (2.4.16). CPU frequency is 132 MHz, bus @ 33 MHz and we don't have L2 cache.
The results are presented bellow, for comparison. We are particularly interesting in knowing how our memory latencies and related figures (context switching, for example) are compared to other board's. Thanks in advance, Ricardo Scop mailto:scop at vanet.com.br R SCOP Consult. ------------------------------------------------------------- "Don't hate, it's too big a burden to bear." ~Martin Luther King Jr. ------------------------------------------------------------- L M B E N C H 2 . 0 S U M M A R Y ------------------------------------ Basic system parameters ---------------------------------------------------- Host OS Description Mhz --------- ------------- ----------------------- ---- nr2g Linux 2.4.16 ppc 132 Processor, Processes - times in microseconds - smaller is better ---------------------------------------------------------------- Host OS Mhz null null open selct sig sig fork exec sh call I/O stat clos TCP inst hndl proc proc proc --------- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ---- nr2g Linux 2.4.16 132 1.70 3.51 16.5 23.7 212.8 6.94 23.8 3888 28.K 65.K 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 --------- ------------- ----- ------ ------ ------ ------ ------- ------- nr2g Linux 2.4.16 1.310 259.1 893.1 272.0 902.5 275.9 907.7 *Local* Communication latencies in microseconds - smaller is better ------------------------------------------------------------------- Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP ctxsw UNIX UDP TCP conn --------- ------------- ----- ----- ---- ----- ----- ----- ----- ---- nr2g Linux 2.4.16 1.310 45.0 89.3 600.5 873.6 2706 File & VM system latencies in microseconds - smaller is better -------------------------------------------------------------- Host OS 0K File 10K File Mmap Prot Page Create Delete Create Delete Latency Fault Fault --------- ------------- ------ ------ ------ ------ ------- ----- ----- nr2g Linux 2.4.16 3484.3 2325.6 18.2K 3571.4 1.334 1211.0 *Local* Communication bandwidths in MB/s - bigger is better ----------------------------------------------------------- Host OS Pipe AF TCP File Mmap Bcopy Bcopy Mem Mem UNIX reread reread (libc) (hand) read write --------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- ----- nr2g Linux 2.4.16 28.2 16.1 8.72 24.7 65.2 33.4 33.4 65.2 57.7 Memory latencies in nanoseconds - smaller is better (WARNING - may not be correct, check graphs) --------------------------------------------------- Host OS Mhz L1 $ L2 $ Main mem Guesses --------- ------------- ---- ----- ------ -------- ------- nr2g Linux 2.4.16 132 15.2 397.1 409.8 No L2 cache? ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/