Package: iftop Version: 1.0~pre4-6 Severity: normal The way iftop calibrates its linear scale, it seems to often make the scale much wider than the actual available network bandwidth, leading to bar graphs that are quite narrow, often 1 character wide or 0 characters wide, for network connections that are pushing relatively a lot of traffic. This makes it not very useful to spotting at a glance what is eating bandwidth.
I generally press L to switch to log scale, which avoids the problem,
showing big wide bars.
For example, I've started iftop when the network is nearly completely
idle. It picked a scale 1KB-8KB, which is fine. Then I started a
download, which ran at 300-615KB/s. This causes the scale to change to
2MB-12MB. Since my wifi connection happens to be limited to around
1MB/s, this guarantees bars will never be more than a few characters
wide.
Here's how that displays after downloading for several minutes:
2.38MB 4.77MB 7.15MB 9.54MB
11.9MB
└───────────────┴───────────────┴────────────────┴───────────────┴────────────────
darkstar.kitenet.:51000 => kitenet.net:ssh 849KB 6.87KB 5.68KB
5.95KB
### <= 57.7MB 478KB 381KB
410KB
──────────────────────────────────────────────────────────────────────────────────
TX: cum: 1.10MB peak: 9.33KB rates: 7.07KB 4.95KB
6.71KB
RX: 72.0MB 648KB 466KB 325KB
457KB
TOTAL: 73.1MB 657KB 473KB 330KB
463KB
("RX:" is highlighted and I've marked the top highlight using "###".)
-- System Information:
Debian Release: buster/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing'),
(500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.18.0-3-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_USER, TAINT_WARN, TAINT_OOT_MODULE
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8),
LANGUAGE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages iftop depends on:
ii libc6 2.28-6
ii libncurses6 6.1+20181013-1
ii libpcap0.8 1.8.1-6
ii libtinfo6 6.1+20181013-1
iftop recommends no packages.
iftop suggests no packages.
-- no debconf information
--
see shy jo
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