Am Freitag, 24. August 2018, 17:30:13 CEST schrieb John David Anglin: > On 2018-08-24 9:27 AM, Rolf Eike Beer wrote: > > Am 2018-08-24 14:09, schrieb Helge Deller: > >>> > On 2018-08-21 2:31 PM, Rolf Eike Beer wrote: > >>> With this patch I get this timing: > >>> > >>> gcc7 - Time: 2018-08-24T01:42:07 > >>> gcc6 - Time: 2018-08-24T06:01:27 > >>> > >>> Somewhere in between 4.17.3 and 4.18.0. > >> > >> Rolf, I think plain 4.18 kernel misses Dave's speed-up patches: > >> * > >> http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ > >> ?id=7797167ffde1f00446301cb22b37b7c03194cfaf > >> > >> * > >> http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ > >> ?id=3b885ac1dc35b87a39ee176a6c7e2af9c789d8b8 > >> > >> Both patches have been scheduled to be added to 4.18-stable kernel. > > > > I guess I better revert the previous patch from Dave, no? > > I would say leave the patch. The big part of the slow down is the sync > barrier in the TLB handler. The above > patches don't address this issue. They should speed up spin locks in > general. Ok, with the 2 from the tree and the one by mail I get this: gcc7 2018-08-26T01:10:26 gcc6 2018-08-26T04:59:43
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