Description of problem: Powertop shows that Transmission (GTK bittorrent client) does 100 wake-ups / second when downloading and 50 when idle. Worse, it seems like it has 2 timers (below is idle) : 13,9% ( 49,9) transmission-gt : do_nanosleep (hrtimer_wakeup) 0,3% ( 1,1) transmission-gt : schedule_timeout (process_timeout) Version-Release number of selected component (if applicable): # rpm -q transmission transmission-0.72-1.fc7 How reproducible: Always. Steps to Reproduce: Just open a torrent file and start downloading. Actual results: A very high number of wake-ups Expected results: Transmission should be downloading without such timers. Additional info: Want anything else ? Just ask. Sorry, I have no patch for this and I don't even know where the problem is located in the source code. However, given that one of Fedora 8 features is to fix wake-ups across the distros, here is one :)
Better, but not fixed with version 0.82 in F8: When idle : # powertop ... 32,6% ( 49,9) transmission-gt : do_nanosleep (hrtimer_wakeup) ... 1,8% ( 4,4) <interrupt> : ipw2200, Intel ICH6 Modem, eth0 ... 0,7% ( 1,0) transmission-gt : schedule_timeout (process_timeout) ... When downloading : # powertop ... 72,8% (644,1) <interrupt> : ipw2200, Intel ICH6 Modem, eth0 6,3% ( 56,0) transmission-gt : do_nanosleep (hrtimer_wakeup) ... 2,6% ( 22,8) transmission-gt : sk_reset_timer (tcp_write_timer) ... 0,3% ( 2,8) transmission-gt : sk_reset_timer (tcp_delack_timer) ... The worst timer is not as huge as with previous version, but still... Don't know if it is normal or not, but see how drastically the wakeups on eth0 increase ! Anyway, transmission still has big timers.
I just pushed 0.94 to F-8 updates-testing. Can you check to see if it improves at all ? I'll open a bug upstream after that. thx :-)
Updated to 0.94. When idle: 28,4% ( 16,9) transmission : schedule_timeout (process_timeout) When downloading: 69,0% (418,8) <interrupt> : ipw2200, Intel ICH6 Modem, eth0 6,6% ( 40,3) transmission : schedule_timeout (process_timeout) Much better on idle :) But didn't improve when downloading... :( The wakeups on eth0 seem to depend on the download/upload speed, so it can't be compared with previous value as I don't remember which speed I was downloading previously. Ayway, it's really high... :S Thanks for considering this issue.
There's still a timeout running when nothing might be happening, in main.c: cbdata->timer = g_timeout_add( UPDATE_INTERVAL, updatemodel, cbdata ); If needed at all (it would be better to have signals telling us the stats changed), the timeout should only be there when: - the window is visible (the status icon doesn't show the status of downloads anyway) - there are active torrents in the list If there aren't any active torrents, and/or the window isn't visible, the timeout shouldn't be there. As for the wakeups when downloading, I think that's kind of expected...
I'm currently using Transmission 1.0 that got pushed into updates some time ago. Here's the trace with powertop when idle: 14,9% ( 18,3) transmission : schedule_timeout (process_timeout) And when downloading: 17,4% ( 50,9) transmission : schedule_timeout (process_timeout) Didn't improve much since 0.94. Did you open the bug upstream ? If that's the case, this one could be closed...
1.11 still shows about 20 wakeups/sec when idle. http://trac.transmissionbt.com/ticket/915
Fixed in 1.20. Yay! Expect 1.20 in a testing repo near you soon.
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