Re: [PATCH v2 0/5] mm: support parallel free of memory

From	Aaron Lu <aaron.lu@intel.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 0/5] mm: support parallel free of memory
Date	2017-03-17 03:30 +0100
Message-ID	<tlPOq-7wu-7@gated-at.bofh.it> (permalink)
References	<tld6q-5vn-13@gated-at.bofh.it> <tlPOq-7wu-9@gated-at.bofh.it>
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On Thu, Mar 16, 2017 at 02:38:44PM -0500, Alex Thorlton wrote:
> On Wed, Mar 15, 2017 at 04:59:59PM +0800, Aaron Lu wrote:
> > v2 changes: Nothing major, only minor ones.
> >  - rebased on top of v4.11-rc2-mmotm-2017-03-14-15-41;
> >  - use list_add_tail instead of list_add to add worker to tlb's worker
> >    list so that when doing flush, the first queued worker gets flushed
> >    first(based on the comsumption that the first queued worker has a
> >    better chance of finishing its job than those later queued workers);
> >  - use bool instead of int for variable free_batch_page in function
> >    tlb_flush_mmu_free_batches;
> >  - style change according to ./scripts/checkpatch;
> >  - reword some of the changelogs to make it more readable.
> > 
> > v1 is here:
> > https://lkml.org/lkml/2017/2/24/245
> 
> I tested v1 on a Haswell system with 64 sockets/1024 cores/2048 threads
> and 8TB of RAM, with a 1TB malloc.  The average free() time for a 1TB
> malloc on a vanilla kernel was 41.69s, the patched kernel averaged
> 21.56s for the same test.

Thanks a lot for the test result.

> 
> I am testing v2 now and will report back with results in the next day or
> so.

Testing plain v2 shouldn't bring any surprise/difference, better set the
following param before the test(I'm planning to make them default in the
next version):
# echo 64 > /sys/devices/virtual/workqueue/batch_free_wq/max_active
# echo 1030 > /sys/kernel/debug/parallel_free/max_gather_batch_count

Regards,
Aaron

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[PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-15 10:10 +0100
  [PATCH v2 2/5] mm: parallel free pages Aaron Lu <aaron.lu@intel.com> - 2017-03-15 10:10 +0100
    Re: [PATCH v2 2/5] mm: parallel free pages "Hillf Danton" <hillf.zj@alibaba-inc.com> - 2017-03-15 10:50 +0100
      Re: [PATCH v2 2/5] mm: parallel free pages Aaron Lu <aaron.lu@intel.com> - 2017-03-15 13:00 +0100
  Re: [PATCH v2 0/5] mm: support parallel free of memory Michal Hocko <mhocko@kernel.org> - 2017-03-15 15:30 +0100
    Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-15 16:50 +0100
      Re: [PATCH v2 0/5] mm: support parallel free of memory Michal Hocko <mhocko@kernel.org> - 2017-03-15 17:30 +0100
        Re: [PATCH v2 0/5] mm: support parallel free of memory Tim Chen <tim.c.chen@linux.intel.com> - 2017-03-15 22:40 +0100
          Re: [PATCH v2 0/5] mm: support parallel free of memory Michal Hocko <mhocko@kernel.org> - 2017-03-16 10:10 +0100
            Re: [PATCH v2 0/5] mm: support parallel free of memory Tim Chen <tim.c.chen@linux.intel.com> - 2017-03-16 19:40 +0100
              Re: [PATCH v2 0/5] mm: support parallel free of memory Minchan Kim <minchan@kernel.org> - 2017-03-17 09:10 +0100
              Re: [PATCH v2 0/5] mm: support parallel free of memory Michal Hocko <mhocko@kernel.org> - 2017-03-17 09:30 +0100
                Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-17 13:40 +0100
                Re: [PATCH v2 0/5] mm: support parallel free of memory Michal Hocko <mhocko@kernel.org> - 2017-03-17 14:00 +0100
                Re: [PATCH v2 0/5] mm: support parallel free of memory Peter Zijlstra <peterz@infradead.org> - 2017-03-17 14:20 +0100
                Re: [PATCH v2 0/5] mm: support parallel free of memory Peter Zijlstra <peterz@infradead.org> - 2017-03-17 14:00 +0100
                Re: [PATCH v2 0/5] mm: support parallel free of memory Michal Hocko <mhocko@kernel.org> - 2017-03-17 14:30 +0100
            Re: [PATCH v2 0/5] mm: support parallel free of memory Dave Hansen <dave.hansen@intel.com> - 2017-03-21 16:10 +0100
              Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-22 09:20 +0100
              Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-24 08:10 +0100
            Re: [PATCH v2 0/5] mm: support parallel free of memory Tim Chen <tim.c.chen@linux.intel.com> - 2017-03-21 16:20 +0100
        Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-16 08:00 +0100
        Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-16 08:40 +0100
          Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-16 15:00 +0100
            Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-16 15:20 +0100
  Re: [PATCH v2 0/5] mm: support parallel free of memory Vlastimil Babka <vbabka@suse.cz> - 2017-03-15 16:00 +0100
    Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-15 17:00 +0100
    Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-17 04:20 +0100
  Re: [PATCH v2 0/5] mm: support parallel free of memory Aaron Lu <aaron.lu@intel.com> - 2017-03-17 03:30 +0100

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