Re: [RFC v4 00/20] Speculative page faults

From	Laurent Dufour <ldufour@linux.vnet.ibm.com>
Newsgroups	linux.kernel
Subject	Re: [RFC v4 00/20] Speculative page faults
Date	2017-06-13 12:30 +0200
Message-ID	<tRRfb-6Mo-13@gated-at.bofh.it> (permalink)
References	<tQt5f-2GI-3@gated-at.bofh.it> <tQtHY-38t-5@gated-at.bofh.it> <tQu1k-3gb-25@gated-at.bofh.it> <tQv74-3Sn-21@gated-at.bofh.it> <tQvA5-4gT-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 09/06/2017 18:59, Tim Chen wrote:
> On 06/09/2017 09:35 AM, Michal Hocko wrote:
>> On Fri 09-06-17 17:25:51, Laurent Dufour wrote:
>> [...]
>>> Thanks Michal for your feedback.
>>>
>>> I mostly focused on this database workload since this is the one where
>>> we hit the mmap_sem bottleneck when running on big node. On my usual
>>> victim node, I checked for basic usage like kernel build time, but I
>>> agree that's clearly not enough.
>>>
>>> I try to find details about the 'kbench' you mentioned, but I didn't get
>>> any valid entry.
>>> Would you please point me on this or any other bench tool you think will
>>> be useful here ?
>>
>> Sorry I meant kernbech (aka parallel kernel build). Other highly threaded
>> workloads doing a lot of page faults and address space modification
>> would be good to see as well. I wish I could give you much more
>> comprehensive list but I am not very good at benchmarks.
>>
> 
> Laurent,
> 
> Have you tried running the multi-fault microbenchmark by Kamezawa?
> It does threaded page faults in parallel.
> Peter ran that when he posted his specualtive page faults patches.
> https://lkml.org/lkml/2010/1/6/28


Thanks Tim to remind me about this, I downloaded and built it a time ago
and forget about it. I'll give it another try !

Thread

[RFC v4 00/20] Speculative page faults Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-06-09 16:30 +0200
  [RFC v4 15/20] mm/spf: protect mremap() against speculative pf Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-06-09 16:30 +0200
  [RFC v4 06/20] mm: Provide speculative fault infrastructure Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-06-09 16:30 +0200
  Re: [RFC v4 00/20] Speculative page faults Michal Hocko <mhocko@kernel.org> - 2017-06-09 17:10 +0200
    Re: [RFC v4 00/20] Speculative page faults Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-06-09 17:30 +0200
      Re: [RFC v4 00/20] Speculative page faults Michal Hocko <mhocko@kernel.org> - 2017-06-09 18:40 +0200
        Re: [RFC v4 00/20] Speculative page faults Tim Chen <tim.c.chen@linux.intel.com> - 2017-06-09 19:10 +0200
          Re: [RFC v4 00/20] Speculative page faults Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-06-13 12:30 +0200
        Re: [RFC v4 00/20] Speculative page faults Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-06-13 12:00 +0200
  Re: [RFC v4 00/20] Speculative page faults "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-06-09 21:00 +0200
  Re: [RFC v4 00/20] Speculative page faults Jan Kara <jack@suse.cz> - 2017-06-12 12:30 +0200
    Re: [RFC v4 00/20] Speculative page faults Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-06-13 12:30 +0200

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