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From: "Amancio Hasty Jr." <hasty@star-gate.com>
Newsgroups: comp.os.linux.networking,comp.unix.bsd.freebsd.misc
Subject: Re: TCP latency
Date: Tue, 16 Jul 1996 19:11:37 -0700
Organization: TLGnet Inc., (formerly The Little Garden)
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Message-ID: <31EC4BD9.41C67EA6@star-gate.com>
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Xref: euryale.cc.adfa.oz.au comp.os.linux.networking:45478 comp.unix.bsd.freebsd.misc:23780
Hmmm... you may find my lmbench interesting:
OS FreeBSD-2.2
CPU P100
32MB 60ns dram (darn is not sdram, bedo async sram, fpm ram, etc..)
L M B E N C H 1 . 0 S U M M A R Y
------------------------------------
Processor, Processes - times in microseconds
--------------------------------------------
Host OS Mhz Null Null Simple /bin/sh Mmap 2-proc
8-proc
Syscall Process Process Process lat
ctxsw ctxsw
--------- ------------- ---- ------- ------- ------- ------- ---- ------
------
rah.star- FreeBSD 2.2-C 99 8 2K 10K 17K 97
23 31
*Local* Communication latencies in microseconds
-----------------------------------------------
Host OS Pipe UDP RPC/ TCP RPC/
UDP TCP
--------- ------------- ------- ------- ------- ------- -------
rah.star- FreeBSD 2.2-C 72 236 411 276 497
*Local* Communication bandwidths in megabytes/second
Host OS Pipe TCP File Mmap Bcopy Bcopy Mem
Mem
reread reread (libc) (hand) read write
--------- ------------- ---- ---- ------ ------ ------ ------ ---- -----
rah.star- FreeBSD 2.2-C 48 13 36 53 43 39 65 83
Memory latencies in nanoseconds
(WARNING - may not be correct, check graphs)
--------------------------------------------
Host OS Mhz L1 $ L2 $ Main mem Guesses
--------- ------------- --- ---- ---- -------- -------
rah.star- FreeBSD 2.2-C 99 10 115 180
----------------------------------------------------
Peter Mutsaers wrote:
>
> I just measured lmbench on my machine with both FreeBSD and Linux
> (both current). It is a P90 with 48M.
>
> L M B E N C H 1 . 0 S U M M A R Y
> ------------------------------------
>
> Processor, Processes - times in microseconds
> --------------------------------------------
> Host OS Mhz Null Null Simple /bin/sh Mmap 2-proc 8-proc
> Syscall Process Process Process lat ctxsw ctxsw
> --------- ------------- ---- ------- ------- ------- ------- ---- ------ ------
> plm Linux 1.3.99 90 4 2.1K 11.5K 53K 404 14 19
> plm.xs4al FreeBSD 2.2-C 90 15 2.9K 13.6K 23K 102 37 45
>
> *Local* Communication latencies in microseconds
> -----------------------------------------------
> Host OS Pipe UDP RPC/ TCP RPC/
> UDP TCP
> --------- ------------- ------- ------- ------- ------- -------
> plm Linux 1.3.99 51 260 624 400 786
> plm.xs4al FreeBSD 2.2-C 108 344 622 409 784
>
> *Local* Communication bandwidths in megabytes/second
> ----------------------------------------------------
> Host OS Pipe TCP File Mmap Bcopy Bcopy Mem Mem
> reread reread (libc) (hand) read write
> --------- ------------- ---- ---- ------ ------ ------ ------ ---- -----
> plm Linux 1.3.99 24 8.1 25.4 41.7 26 25 49 46
> plm.xs4al FreeBSD 2.2-C 25 9.0 27.9 39.6 26 25 49 45
>
> Memory latencies in nanoseconds
> (WARNING - may not be correct, check graphs)
> --------------------------------------------
> Host OS Mhz L1 $ L2 $ Main mem TLB Guesses
> --------- ------------- --- ---- ---- -------- --- -------
> plm Linux 1.3.99 90 11 243 426 918
> plm.xs4al FreeBSD 2.2-C 89 11 204 428 925
>
--
Amancio Hasty
Hasty Software Consulting Services
Tel: 415-495-3046
Fax: 415-495-3046
Cellular: 415-309-8434
e-mail: hasty@star-gate.com Powered by FreeBSD