Comment 18 for bug 579117

Ok I made them go away a bit.

Clicked on "disconnect" in NetworkManager. ifconfig down on wlan0 and eth0 interfaces, leaving only lo0. Started up a terminal, nothing else (save what Ubuntu starts up on its own). Ran the same cyclictest as above.

Here are the first few lines of the histogram, sorted in decreasing order of hits:

# Histogram
107011 008137
058011 007286
036011 007205
073011 005618
047011 004095
007011 004067
071011 004026
087011 003693
107012 003457
103011 003336
032011 002941
030011 002642
038011 002626
022011 002561
075011 002515
058012 002502
006011 002399
036012 002334
051011 002294

Conversely, here are the worst delays and their counts:

126012 000076
126013 000027
126014 000009
126016 000005
126017 000001
126018 000002
126020 000001
126021 000002
126022 000001
126023 000001
126027 000002
126033 000001
126057 000001
126101 000001
126221 000001
126303 000001
126353 000001
126940 000001
# Total: 000259446
# Max Latency: 126940 / 1000000

So, not sure what to think about this, 127ms still seems like a fairly large latency.

Does this help - my laptop is a hmm five year old Toshiba with a dual-core 3.2Ghz P-4 and 1Gb of memory, a 5400rpm 120Gb EIDE hard drive, Phoenix BIOS. Maybe a 127ms latency is "normal" on one of these babies! Though it sounds like a big latency to me.