Hi, > > Downloading a torrent with transmission 4 from unstable does not use 100% > > CPU core. > > > > Can you reproduce? > > I have upgraded to 4.0.2-1 since then and I am now using the QT client. > But using the updated torrent (see http://osm.cquest.org/torrents) top > still reports Transmission using a full core: > > $ top -n1 | grep trans > 10472 fgouget 20 0 3520476 328540 62496 S 118.8 1.0 330:01.80 > transmi+ > > So 118% CPU. > > But in ps the CPU usage is stuck at 3.7%: > $ ps aux | grep trans > fgouget 10472 3.7 1.0 3520476 329364 ? Sl Apr19 329:41 > /usr/bin/transmission-qt -session > 10cae0c76f000170761859900000334600170_1710862333_885767 > > This is while downloading the current osm.pdf.torrent file at a reported > 150 MB/s average speed (1200 Mbps). While this is a 1 Gbps Internet > connection and it is indeed maxed out, that still at most 125 MB/s. So I > think the data must be compressed and transmission is reporting the > uncompressed data transfer rate. > > Also now that the transfer is complete transmission is back to 0% CPU > usage. > > So maybe transmission was just kept busy by the fast transfer rate? > (i7-4790K, verifying and uncompressing the data)
I guess so, because when I download this torrent using transmission-daemon at 120 MB/s on a lower end machine, the CPU core usage changes between 10% and 120%. I guess this is all normal, fast transfer rates are demanding. Do you see other unsual CPU usage than can be linked with very low transfer rates? If not, I guess we can close this. Thanks, Alex
