Re: Add parameter to limit LTO streaming parallelism

2019-04-11 Thread Richard Biener
On Thu, 11 Apr 2019, Jan Hubicka wrote: > > On Thu, 11 Apr 2019, Jan Hubicka wrote: > > > > > Hi, > > > the LTO streaming forks for every partition. With the number of > > > partitions incrased to 128 and relatively large memory usage (around > > > 5GB) needed to WPA firefox this causes kernel to

Re: Add parameter to limit LTO streaming parallelism

2019-04-11 Thread Jan Hubicka
> On Thu, 11 Apr 2019, Jan Hubicka wrote: > > > Hi, > > the LTO streaming forks for every partition. With the number of > > partitions incrased to 128 and relatively large memory usage (around > > 5GB) needed to WPA firefox this causes kernel to spend a lot of time > > probably by copying the page

Re: Add parameter to limit LTO streaming parallelism

2019-04-11 Thread Richard Biener
On Thu, 11 Apr 2019, Jan Hubicka wrote: > Hi, > the LTO streaming forks for every partition. With the number of > partitions incrased to 128 and relatively large memory usage (around > 5GB) needed to WPA firefox this causes kernel to spend a lot of time > probably by copying the page tables. > >