Mir

  1. Bug #1388490
  2. Comment #8

Comment 8 for bug 1388490

Revision history for this message
Daniel van Vugt (vanvugt) wrote : Re: Frame rate is artificially low on older Intel Atom systems due to aggressive power management

Confirmed this bug still exists for the Atom N270 in Ubuntu 16.04 with kernel 4.4.0-22-generic:

[2016-05-19 14:39:21.020231] compositor: Display 0xb1a00470 averaged 22.836 FPS, 1.929 ms/frame, latency 40.633 ms, 23 frames over 1.007 sec, 0% bypassed
[2016-05-19 14:39:20.013544] perf: mir_demo_client_egltriangle: 19.92 FPS, render time 0.53ms, buffer lag 151.47ms (3 buffers)

The same workarounds per above still work to get graphics smooth again:

[2016-05-19 14:33:04.257168] compositor: Display 0xb1a00470 averaged 59.872 FPS, 1.948 ms/frame, latency 13.574 ms, 60 frames over 1.002 sec, 0% bypassed
[2016-05-19 14:33:04.124395] perf: mir_demo_client_egltriangle: 59.88 FPS, render time 0.44ms, buffer lag 49.68ms (3 buffers)