Date: Fri, 1 Dec 2006 21:32:34 -0600 (CST) From: Alan Amesbury <amesbury@umn.edu> To: FreeBSD-gnats-submit@FreeBSD.org Subject: amd64/106194: 'systat -if' display bug Message-ID: <20061202033234.B308545060@paulaner.oitsec.umn.edu> Resent-Message-ID: <200612020340.kB23e4KA066286@freefall.freebsd.org>
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>Number: 106194 >Category: amd64 >Synopsis: 'systat -if' display bug >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-amd64 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Dec 02 03:40:03 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Alan Amesbury >Release: FreeBSD 6.1-RELEASE-p10 amd64 >Organization: University of Minnesota >Environment: System: FreeBSD [REDACTED].umn.edu 6.1-RELEASE-p10 FreeBSD 6.1-RELEASE-p10 #1: Thu Oct 12 14:14:54 CDT 2006 root@[REDACTED].umn.edu:/usr/obj/usr/src/sys/[REDACTED-NONGENERIC] amd64 This is a Dell PowerEdge 850 with HTT enabled. The kernel's slightly modified from GENERIC. >Description: For large amounts of total data, FreeBSD/amd64's 'systat -if' changes units and appears to report in bits. This is an example screenshot: /0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10 Load Average |||| Interface Traffic Peak Total lo0 in 0.000 KB/s 0.000 KB/s 9.832 KB out 0.000 KB/s 0.000 KB/s 9.832 KB bge1 in 90.720 MB/s 101.412 MB/s 2903082122259256.000 b out 0.000 KB/s 0.000 KB/s 0.244 KB bge0 in 0.025 KB/s 0.395 KB/s 286.027 MB out 0.065 KB/s 0.451 KB/s 406.052 MB The host in question has been up about 50 days, so it's hard to say exactly when this display bug gets tickled. I'm pretty sure it's displaying in bits because a) the small "b" is a good hint, and more importantly b) there's no way this host has seen 2600+TB in only 50 days. 362885265282407 bytes (or around 330TB) is a believeable number, however. >How-To-Repeat: Pass multiple terabytes through an interface. Watch systat's counter. >Fix: I'm not sure, but I think this might have something to do with the stuff around line 123 of src/usr.bin/systat/ifstat.c,v 1.2 2004/03/09 11:57:27 dwmalone Exp The FreeBSD/i386 version doesn't exhibit this behavior, but the counter appears to simply wrap at 4GB anyway. I suspect that's a limitation of the architecture, though. Please let me know if you need additional information. >Release-Note: >Audit-Trail: >Unformatted:
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