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List:       haiku-bugs
Subject:    [haiku-bugs] Re: [Haiku] #14979: CPU scheduler has scalability issues on SMP systems with 10+ CPUs
From:       "Haiku" <trac () haiku-os ! org>
Date:       2019-03-25 16:19:56
Message-ID: 058.4b01ca06d1d340108a2410a2989a9987 () haiku-os ! org
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#14979: CPU scheduler has scalability issues on SMP systems with 10+ CPUs
-------------------------+----------------------------
   Reporter:  ambroff    |      Owner:  nobody
       Type:  bug        |     Status:  new
   Priority:  normal     |  Milestone:  Unscheduled
  Component:  - General  |    Version:  R1/Development
 Resolution:             |   Keywords:
 Blocked By:             |   Blocking:
Has a Patch:  0          |   Platform:  x86-64
-------------------------+----------------------------

Comment (by ambroff):

 I haven't had time to work on this since Saturday, but I'll collect more
 info tomorrow or Wednesday.

 My plan is:

 1.) To try to reproduce with kvm
 2.) To try reproducing with bare metal again now that I have more
 instrumentation (I didn't have scheduler profiler in the build at all when
 I first saw this)
 3.) Try blacklisting mwait and intel_cstates
 4.) Look into the lead waddlesplash found in the freebsd repo.

-- =

Ticket URL: <https://dev.haiku-os.org/ticket/14979#comment:7>
Haiku <https://dev.haiku-os.org>
The Haiku operating system.

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