kern/81496: acd (atapicd) device lacks devstat

[Poul-Henning Kamp]

The following reply was made to PR kern/81496; it has been noted by GNATS.

From: "Poul-Henning Kamp" <phk at phk.freebsd.dk>
To: Andriy Gapon <avg at icyb.net.ua>
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/81496: acd (atapicd) device lacks devstat 
Date: Thu, 26 May 2005 18:09:25 +0200

 In message <4295F115.4050301 at icyb.net.ua>, Andriy Gapon writes:
 >on 26.05.2005 18:31 Poul-Henning Kamp said the following:
 >> In message <200505261152.j4QBqFEV082234 at www.freebsd.org>, Andriy Gapon writes:
 >> 
 >> 
 >> Use the gstat(8) program instead.
 >> 
 >
 >Poul-Henning,
 >
 >here's an output from gstat while copying a file from a UDF filesystem
 >on acd0 to a filesystem on ad0s1f (5.4-release, atapicam is present in
 >the kernel):
 >
 >dT: 0.501  flag_I 500000us  sizeof 240  i -1
 > L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
 >    0     22      0      0    0.0     22   2811    1.5    3.3| ad0
 >    0     22      0      0    0.0     22   2811    1.5    3.3| ad0s1
 >    0      0      0      0    0.0      0      0    0.0    0.0| acd0
 >    0      0      0      0    0.0      0      0    0.0    0.0| acd0t01
 >    0      0      0      0    0.0      0      0    0.0    0.0| ad0s1a
 >    0      0      0      0    0.0      0      0    0.0    0.0| ad0s1b
 >    0      0      0      0    0.0      0      0    0.0    0.0| ad0s1c
 >    0      0      0      0    0.0      0      0    0.0    0.0| ad0s1d
 >    0      0      0      0    0.0      0      0    0.0    0.0| ad0s1e
 >    0     22      0      0    0.0     22   2811    1.5    3.4| ad0s1f
 >    0      0      0      0    0.0      0      0    0.0    0.0| acd1
 >    1     44     44   2811   22.5      0      0    0.0   99.1| cd0
 >    0      0      0      0    0.0      0      0    0.0    0.0| acd1t01
 >    0      0      0      0    0.0      0      0    0.0    0.0| cd1
 >
 >
 >I am not sure why acd0 got all zeros.
 
 Because you use atapi-cam and /dev/cd0 ?
 
 >Anyway, even if gstat should work perfectly for acd, I think it is no
 >reason to have iostat/systat incomplete. Also, a reference to gstat(8)
 >in iostat(8) and systat(1) would be nice too.
 
 Yeah, I think it is point 1032 on my todo list :-(
 
 >Btw, is it a bug or a feature that gstat requires root privileges ? -
 >iostat/systat can be run as a regualr user:
 >gstat: geom_stats_open(): Permission denied
 
 That's probably a bug.
 
 -- 
 Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
 phk at FreeBSD.ORG         | TCP/IP since RFC 956
 FreeBSD committer       | BSD since 4.3-tahoe    
 Never attribute to malice what can adequately be explained by incompetence.