Comment # 102 on bug 1112824 from Takashi Iwai

Quickly looking at the logs of comment 97, the main differences between two
kernel configs are:

  CONFIG_NO_HZ_FULL=y for Fedora
  CONFIG_NO_HZ_IDLE=y for TW

  CONFIG_PREEMPT_VOLUNTARY=y for Fedora
  CONFIG_PREEMPT=y for TW

  CONFIG_SCHED_AUTOGROUP=y for Fedora
  CONFIG_SCHED_AUTOGROUP=n for TW

  CONFIG_SLUB=y for Fedora
  CONFIG_SLAB=y for TW

The last one is unlikely influencing on the performance, though.
The rest are subtle drivers and debugging configs.

So I'm building a TW kernel with the config changes above to follow Fedora in
OBS home:tiwai:bsc1112824 repo.  The build should finish in an hour or so.

Please give it a try and see whether if this really improves things as
advertised here.