Subject: Re: Faster pipes, now with uvm_loan()
To: Jarom r <jdolecek@netbsd.org>
From: Simon Burge <simonb@wasabisystems.com>
List: tech-kern
Date: 04/25/2001 02:40:24
Just to join in the fun:
DECsystem 5000/260 (R4400, 60MHz)
text data bss dec hex filename
2006936 45472 368156 2420564 24ef54 /onetbsd
2013880 45504 368428 2427812 250ba4 /netbsd
before Pipe bandwidth: 10.60 11.23 12.21 11.76 MB/sec
after Pipe bandwidth: 46.34 41.40 37.35 46.06 MB/sec
before Pipe latency: 140.5883 137.3894 137.1826 122.5174 microseconds
after Pipe latency: 121.2334 120.7624 121.1673 120.6366 microseconds
Alpha PC164 (Alpha 21164A, 500MHz)
[ old kernel lost, no size comparison ]
before Pipe bandwidth: 57.97 63.08 64.90 55.89 MB/sec
after Pipe bandwidth: 201.67 142.47 198.28 142.90 MB/sec
before Pipe latency: 28.3014 28.7068 28.1293 29.1413 microseconds
after Pipe latency: 17.0290 14.6929 16.8709 17.6301 microseconds
I notice that people haven't been showing latency results (from
lat_pipe) - but it's good to see those numbers better too on
these two platforms.
Simon.
--
Simon Burge <simonb@wasabisystems.com>
NetBSD CDs, Support and Service: http://www.wasabisystems.com/