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Groups > linux.kernel > #1195472
| From | Vikas Shivappa <vikas.shivappa@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | RE: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide |
| Date | 2015-07-29 22:10 +0200 |
| Message-ID | <pRFPQ-1zd-13@gated-at.bofh.it> (permalink) |
| References | <pHyFX-2Jd-3@gated-at.bofh.it> <pHyFY-2Jd-7@gated-at.bofh.it> <pRmWS-7IT-9@gated-at.bofh.it> <pRn6x-8bu-5@gated-at.bofh.it> <pRolX-1At-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, 28 Jul 2015, Auld, Will wrote: > > >> -----Original Message----- >> >> Same comment as above - Cgroup masks can always overlap and other cgroups >> can allocate the same cache , and hence wont have exclusive cache allocation. > > [Auld, Will] You can define all the cbm to provide one clos with an exclusive area Do you mean a CLOS that has all the bits set. We donot support exclusive area today. The bits in the mask can overlap .. hence can always share the same cache allocation . > >> >> So natuarally the cgroup with tasks would get to use the cache if it has the same >> mask (say representing 50% of cache in your example) as others . > > [Auld, Will] automatic adjustment of the cbm make me nervous. There are times > when we want to limit the cache for a process independent of whether there is > lots of unused cache. > Please see example below - In general , I just mean the cache mask can have bits that can overlap - does not matter whether there is tasks in it or not. > >> (assume there are 8 bits max cbm) >> cgroupa - mask - 0xf >> cgroupb - mask - 0xf . Now if cgroupa has no tasks , cgroupb naturally gets all >> the cache. >> >> Thanks, >> Vikas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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RE: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide "Auld, Will" <will.auld@intel.com> - 2015-07-29 03:30 +0200
Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Marcelo Tosatti <mtosatti@redhat.com> - 2015-07-29 21:40 +0200
Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Marcelo Tosatti <mtosatti@redhat.com> - 2015-07-30 22:10 +0200
Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Marcelo Tosatti <mtosatti@redhat.com> - 2015-07-31 17:40 +0200
Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Martin Kletzander <mkletzan@redhat.com> - 2015-08-02 17:50 +0200
Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Marcelo Tosatti <mtosatti@redhat.com> - 2015-08-03 17:20 +0200
Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Vikas Shivappa <vikas.shivappa@intel.com> - 2015-08-03 20:30 +0200
Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Marcelo Tosatti <mtosatti@redhat.com> - 2015-07-31 17:20 +0200
[summary] Re: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Vikas Shivappa <vikas.shivappa@intel.com> - 2015-07-31 18:50 +0200
RE: [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Vikas Shivappa <vikas.shivappa@intel.com> - 2015-07-29 22:10 +0200
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