Eduard Bloch, le Tue 25 Aug 2015 21:35:36 +0200, a écrit : > * Samuel Thibault [Tue, Aug 25 2015, 08:54:35PM]: > > Just so that people reading the log don't take it too exagerated: > > > Eduard Bloch, le Tue 25 Aug 2015 20:24:22 +0200, a écrit : > > > I checked again... about 20% of the time is spent in two calls of pidof > > > > We're here talking about ~15ms each. > > I don't. It's ~270ms each (I added another log with timestamps).
How long is the readlink /proc/*/exe | grep? > It might be true for a shiny Core-i7 system. Actually I also tried with an old Xeon with a few hundred processes running > > > And about 70% is spent by loadkeys executing the mentioned storm of > > > ioctls. > > > > And about 70ms. > > Or ~1.8s on the mentioned device. Ouch. The optimization I mentioned could perhaps reduce that, in a not too complex setup (shift, alt, control, altgr, capslock modifiers) by a 4x factor. To go further a kernel patch is really needed, there is no way around it. Samuel
