Messages in this thread | | | Subject | Re: [PATCH] lis3lv02d: provide means to disable polled input interface | Date | Fri, 16 Apr 2010 13:41:49 +0200 | From | "Marcin Derlukiewicz" <> |
| |
Dnia 09-04-2010 o 15:32:59 Jiri Kosina <jkosina@suse.cz> napisał(a):
> On Fri, 9 Apr 2010, Éric Piel wrote: > >> > This is reported to create 20% CPU usage increase (and proportionaly >> higher >> > power consumption) just for the ipolldevd kernel thread (which is used >> > to read the sensor). >> > >> > As most users probably only use the freefall functionality of the >> driver >> > and not the joystick interface, provide means for disabling the >> registration >> > of joystick device altogether via module parameter. >> > (I'd rather make it default to 0, but this will break backwards >> compatibility). >> Are you saying there is a 20% CPU usage even when the joystick interface >> is not open? This should not happen (and this is not happening on my >> laptop). The polling should happen only when a userspace app opens the >> joystick interface (like running neverball). >> >> So I'd tend to think it's more due to a misconfiguration of the system >> (like xserver using the joystick interface as a pointer device) or it's >> a bug in the way we set up the polling. Could you investigate and let me >> know? > > Marcin originally reported this to me. > > Marcin, could you please check 'lsof' output to see whether the joystick > interface has been open by some application? > > Thanks, >
sorry for the delay, had a crunch time
here is the link for this lsof: https://bugzilla.novell.com/attachment.cgi?id=354953
Best regards, Marcin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |