L M B E N C H 1 . 9 S U M M A R Y ------------------------------------ (Alpha software, do not distribute) 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 inst hndl proc proc proc --------- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ---- i486-linu Linux 2.4.0-t 119 1.8 4.0 51 62 0.33K 9.2 19 4.3K 16K 54K i486-linu Linux 2.4.0-p 119 1.8 4.1 51 64 0.35K 9.2 19 4.5K 16K 55K 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 --------- ------------- ----- ------ ------ ------ ------ ------- ------- i486-linu Linux 2.4.0-t 2 388 1054 296 1733 439 1854 i486-linu Linux 2.4.0-p 5 308 1062 268 1650 416 1822 *Local* Communication latencies in microseconds - smaller is better ------------------------------------------------------------------- Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP ctxsw UNIX UDP TCP conn --------- ------------- ----- ----- ---- ----- ----- ----- ----- ---- i486-linu Linux 2.4.0-t 2 44 131 352 628 2267 i486-linu Linux 2.4.0-p 5 47 109 401 649 2186 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 --------- ------------- ------ ------ ------ ------ ------- ----- ----- i486-linu Linux 2.4.0-t 110 18 337 39 2702 5 0.0K i486-linu Linux 2.4.0-p 111 20 340 42 2829 4 0.0K *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 --------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- ----- i486-linu Linux 2.4.0-t 15 6 6 9 32 14 14 32 39 i486-linu Linux 2.4.0-p 14 7 6 10 32 14 14 32 39 Memory latencies in nanoseconds - smaller is better (WARNING - may not be correct, check graphs) --------------------------------------------------- Host OS Mhz L1 $ L2 $ Main mem Guesses --------- ------------- --- ---- ---- -------- ------- i486-linu Linux 2.4.0-t 119 25 419 452 No L2 cache? i486-linu Linux 2.4.0-p 119 25 365 459