Messages in this thread | | | Date | Wed, 08 Dec 1999 16:56:31 -0500 | From | Paul Ho <> | Subject | Slow lmbench on IBM Netfinity |
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This is an IBM Netfinity 700 with 2x PPro 200MHz 1MB cache, running Linux 2.2.13 in SMP. The system boot up with no problem. It's AFAICT stable but very slow.
I ran lmbench on it and some of the lmbench number seem much slower than the summary <http://www.bitmover.com/lmbench/lmbench-summary>
Overall, application performance seem to be 25% of a single 166MMX!
Following is the lmbench number:
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 --------- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ---- i686-linu Linux 2.2.13- 199 5.7 13. 287 336 1.53K 102.5 125 7.7K 43K 148K i686-linu Linux 2.2.13- 199 5.7 13. 115 137 0.61K 40.7 50 3.2K 18K 68K
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 --------- ------------- ----- ------ ------ ------ ------ ------- ------- i686-linu Linux 2.2.13- 58 77 142 90 154 84 192 i686-linu Linux 2.2.13- 100 78 146 83 87 86 110
*Local* Communication latencies in microseconds - smaller is better ------------------------------------------------------------------- Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP ctxsw UNIX UDP TCP conn --------- ------------- ----- ----- ---- ----- ----- ----- ----- ---- i686-linu Linux 2.2.13- 58 253 678 730 1300 4025 i686-linu Linux 2.2.13- 100 139 311 538 761 2064
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 --------- ------------- ------ ------ ------ ------ ------- ----- ----- i686-linu Linux 2.2.13- 148 29 320 42 192374 44 7.5K i686-linu Linux 2.2.13- 148 29 320 42 191531 20 7.4K
*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 --------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- ----- i686-linu Linux 2.2.13- 5 4 4 16 167 18 18 209 20 i686-linu Linux 2.2.13- 7 7 5 16 209 18 18 210 20
Memory latencies in nanoseconds - smaller is better (WARNING - may not be correct, check graphs) --------------------------------------------------- Host OS Mhz L1 $ L2 $ Main mem Guesses --------- ------------- --- ---- ---- -------- ------- i686-linu Linux 2.2.13- 199 15 35 229 i686-linu Linux 2.2.13- 199 15 35 229
Any idea? Any help is appreciated..
TIA Paul
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