Date: Mon, 20 May 1996 14:19:17 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: michaelh@cet.co.jp (Michael Hancock) Cc: bsdi-users@bsdi.com, freebsd-hackers@freebsd.com Subject: Re: ISDN Compression Load on CPU Message-ID: <199605202119.OAA28500@phaeton.artisoft.com> In-Reply-To: <Pine.SV4.3.93.960521003016.1610A-100000@parkplace.cet.co.jp> from "Michael Hancock" at May 21, 96 00:38:55 am
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> SDLComm has a new PCI card called the RISCom/Pri. Primary rate has 23 > 64Kbps B-Channels. I wonder how many cards can be put into a P90 box > running BSD Unix before the compression overloads the CPU? The RISC CPU you mean.. dunno. > How heavy is the computational load of something like STAC compression? As a percentage of CPU: depends on your CPU. As a percentage of file I/O overhead: ~17%, assuming average cache locality, degrading to ~36% for cache-busting (like IOZone). This was on a 486 DX/2-66, so your mileage may vary. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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