Gentoo Archives: gentoo-user

From: Alan McKinnon <alan.mckinnon@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Re: Best way to improve interactivity with heavy disk activity?
Date: Wed, 01 Dec 2010 13:04:35
Message-Id: 201012011503.27137.alan.mckinnon@gmail.com
In Reply to: Re: [gentoo-user] Re: Best way to improve interactivity with heavy disk activity? by Peter Humphrey
1 Apparently, though unproven, at 14:27 on Wednesday 01 December 2010, Peter
2 Humphrey did opine thusly:
3
4 > On Monday 29 November 2010 10:58:10 I wrote:
5 > > ... it'll be tomorrow before I have any emerging to do ...
6 >
7 > Well, what strange results. Desktop responsiveness is drastically
8 > improved. On the other hand:
9 >
10 > $ time (sudo emerge --sync)
11 > [...]
12 > real 10m3.185s
13 > user 0m6.331s
14 > sys 0m0.575s
15 >
16 > This is with a Gentoo rsync server on the same LAN segment. A P4 box on
17 > the same segment recorded about 65s for the same command - nearly 10
18 > times as fast.
19 >
20 > On this box, calculating dependencies took about another 10 minutes,
21 > though I couldn't time it accurately because it's only part of a
22 > process. I was watching gkrellm and its display of CPU load while
23 > simultaneously running four instances of BOINC clients (one per core) at
24 > large niceness levels, and in the graphs I couldn't see any sign that
25 > emerge was running at all.
26
27
28 I get the same here. Flash and such things run nicely without hogging the rest
29 of the machine, but dependency checking also takes ages. Except that I DO see
30 high cpu usage in gkrell. I assume it's a simple I/O blocking issue as the
31 machine is still quite responsive when it's doing a dep check.
32
33
34 --
35 alan dot mckinnon at gmail dot com