[tahoe-dev] [tahoe-lafs] #1170: does new-downloader perform badly for certain situations (such as today's Test Grid)?
tahoe-lafs
trac at tahoe-lafs.org
Fri Aug 13 05:45:38 UTC 2010
#1170: does new-downloader perform badly for certain situations (such as today's
Test Grid)?
------------------------------+---------------------------------------------
Reporter: zooko | Owner:
Type: defect | Status: new
Priority: critical | Milestone: 1.8.0
Component: code-network | Version: 1.8β
Resolution: | Keywords: immutable download regression performance
Launchpad Bug: |
------------------------------+---------------------------------------------
Comment (by zooko):
Brian asked for better measurements, and I ran quite a few (appended
below). I think these results are of little use as they are very noisy and
as far as I can tell I was just wrong when I thought, earlier today, that
1.8.0c2 was downloading this file slower than 1.7.1 did.
On the other hand I think these numbers are trying to tell us that
something is wrong. Why does it occasionally take 40s to download 100K?
After I post this comment I will attach some status reports and flogs.
With v1.7.1 and no flogtool tail:
{{{
$ time curl --range 0-100000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-100K.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 97k 100 97k 0 0 8398 0 0:00:11 0:00:11 --:--:--
25621
real 0m11.913s
user 0m0.004s
sys 0m0.006s
}}}
With 1.7.1 and flogtool tail:
{{{
$ time curl --range 0-100000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-100Kb.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 97k 100 97k 0 0 11044 0 0:00:09 0:00:09 --:--:--
24679
real 0m9.062s
user 0m0.003s
sys 0m0.006s
}}}
v1.7.1 without tail:
{{{
$ time curl --range 0-100000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-100Kc.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 97k 100 97k 0 0 8134 0 0:00:12 0:00:12 --:--:--
23310
real 0m12.301s
user 0m0.004s
sys 0m0.006s
}}}
v1.7.1 and flogtool tail:
{{{
$ time curl --range 0-100000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-100Kd.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 97k 100 97k 0 0 9050 0 0:00:11 0:00:11 --:--:--
24716
real 0m11.057s
user 0m0.004s
sys 0m0.006s
}}}
Now switched from office to home.
v1.7.1 and no flogtool tail, 1M:
{{{
$ time curl --range 0-1000000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-1M.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 976k 100 976k 0 0 33899 0 0:00:29 0:00:29 --:--:--
287k
real 0m29.509s
user 0m0.006s
sys 0m0.013s
}}}
v1.7.1 and flogtool tail, 1M:
{{{
$ time curl --range 0-1000000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-1M.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 976k 100 976k 0 0 51857 0 0:00:19 0:00:19 --:--:--
228k
real 0m19.294s
user 0m0.005s
sys 0m0.012s
}}}
v1.7.1 and no flogtool tail, 100K:
{{{
$ time curl --range 0-100000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-100K.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 97k 100 97k 0 0 2499 0 0:00:40 0:00:40 --:--:--
25031
real 0m40.018s
user 0m0.005s
sys 0m0.011s
}}}
v1.7.1 and flogtool tail, 100K:
{{{
$ time curl --range 0-100000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-100K.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 97k 100 97k 0 0 5249 0 0:00:19 0:00:19 --:--:--
24746
real 0m19.059s
user 0m0.005s
sys 0m0.009s
}}}
v1.8.0c2 and no flogtool tail, 100K:
{{{
$ time curl --range 0-100000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-100K.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 97k 100 97k 0 0 80318 0 0:00:01 0:00:01 --:--:--
80516
real 0m1.253s
user 0m0.004s
sys 0m0.005s
}}}
v1.8.0c2 and no flogtool tail, 1M:
{{{
$ time curl --range 0-1000000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-1M.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 976k 100 976k 0 0 98k 0 0:00:09 0:00:09 --:--:--
118k
real 0m9.961s
user 0m0.005s
sys 0m0.015s
}}}
v1.8.0c2 and flogtool tail, 1M:
{{{
$ time curl --range 0-1000000
http://localhost:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named
=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-
ffmpeg.ogg > bbb-1M.ogg
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 976k 100 976k 0 0 210k 0 0:00:04 0:00:04 --:--:--
268k
real 0m4.645s
user 0m0.004s
sys 0m0.009s
}}}
--
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1170#comment:14>
tahoe-lafs <http://tahoe-lafs.org>
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