Re: [systemd-devel] [PATCH] systemd: add RDTCacheReservation= option to support CAT (Cache Allocation Technology)

2017-01-06 Thread Lennart Poettering
On Fri, 06.01.17 13:51, Marcelo Tosatti (mtosa...@redhat.com) wrote: > > This really doesn't look pretty, neither the approach nor the > > implementation... > > Suggestions to improve the code or the approach are welcome. > > > Is the option actually so complex that calling resctrltool is the

[systemd-devel] sd_journal_next always returns 0

2017-01-06 Thread kumaran ida
I wants to listen to remote journal logs ( logs which we receive from another machine, using systemd-journal-remote) and take some action accordingly. For that I wrote a small application which opens remote journal directory (sd_journal_open_directory (j,"/var/log/journal/remote/",0) and parse

Re: [systemd-devel] [PATCH] systemd: add RDTCacheReservation= option to support CAT (Cache Allocation Technology)

2017-01-06 Thread Lennart Poettering
On Fri, 06.01.17 11:59, Marcelo Tosatti (mtosa...@redhat.com) wrote: > Cache Allocation Technology is a feature on selected recent Intel Xeon > processors which allows control over L3 cache allocation. What precisely is the benefit of making this configurable? Can you describe a basic usecase

[systemd-devel] [PATCH] systemd: add RDTCacheReservation= option to support CAT (Cache Allocation Technology)

2017-01-06 Thread Marcelo Tosatti
Cache Allocation Technology is a feature on selected recent Intel Xeon processors which allows control over L3 cache allocation. Kernel support has been merged to the upstream kernel, via a filesystem resctrlfs. On top of that, a userspace utility, resctrltool has been written to facilitate

Re: [systemd-devel] [PATCH] systemd: add RDTCacheReservation= option to support CAT (Cache Allocation Technology)

2017-01-06 Thread Mantas Mikulėnas
On Fri, Jan 6, 2017 at 3:59 PM, Marcelo Tosatti wrote: > > > Cache Allocation Technology is a feature on selected recent Intel Xeon > processors which allows control over L3 cache allocation. > > Kernel support has been merged to the upstream kernel, via a filesystem >

Re: [systemd-devel] [PATCH] systemd: add RDTCacheReservation= option to support CAT (Cache Allocation Technology)

2017-01-06 Thread Marcelo Tosatti
On Fri, Jan 06, 2017 at 05:26:36PM +0200, Mantas Mikulėnas wrote: > On Fri, Jan 6, 2017 at 3:59 PM, Marcelo Tosatti wrote: > > > > > > > Cache Allocation Technology is a feature on selected recent Intel Xeon > > processors which allows control over L3 cache allocation. > > >