Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c > #129545

Re: stdcbench benchmark

From Keith Thompson <kst-u@mib.org>
Newsgroups comp.lang.c
Subject Re: stdcbench benchmark
Date 2018-04-20 14:22 -0700
Organization None to speak of
Message-ID <lnvacliner.fsf@kst-u.example.com> (permalink)
References (9 earlier) <LV1BC.637530$8G7.584015@fx36.am4> <pb2c5v$8bq$1@dont-email.me> <PC2BC.15349$k%2.551@fx19.iad> <xQ2BC.1239493$lm7.563039@fx12.am4> <8w3BC.5780$yK2.5645@fx16.iad>

Show all headers | View raw

scott@slp53.sl.home (Scott Lurndal) writes:
> bartc <bc@freeuk.com> writes:
>>On 16/04/2018 15:41, Scott Lurndal wrote:
[...]
>>> Indeed.   The application I'm currently working on has between 6
>>> and 96 threads running flat-out, 100%.   No I/O.  Might block
>>> infrequently waiting for a mutex, very infrequently, the threads
>>> are pretty much independent.   Every cycle matters, so
>>> work goes into looking at L1/L2 cache behavior, data layout wrt
>>> cache-lines, compiler optimzations, and inline micro-optimizations
>>> (e.g. avoiding blocking operations like mutexes when possible by using
>>> atomics instead)
>>
>>How much difference would it make if you left all that in place, but 
>>switched off compiler optimisations?
>
> It runs 20 to 40 times slower.

That's interesting.  The application is in C, right?

Is there something unusual about your application that results in
such extreme speed improvement from optimization?  (You mentioned
inlining.)  Can you share the source?  (I suspect the answer is no,
but I thought I'd ask.)

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

stdcbench benchmark Philipp Klaus Krause <pkk@spth.de> - 2018-04-15 10:38 +0200
  Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-15 02:31 -0700
  Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-15 13:42 +0100
    Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-15 18:00 +0100
      Re: stdcbench benchmark Melzzzzz <Melzzzzz@zzzzz.com> - 2018-04-15 18:11 +0000
        Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-15 19:30 +0100
          Re: stdcbench benchmark Melzzzzz <Melzzzzz@zzzzz.com> - 2018-04-15 18:52 +0000
        Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-15 20:15 -0700
  Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-15 20:42 +0100
    Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-15 22:31 +0200
      Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-15 23:29 +0100
        Re: stdcbench benchmark Philipp Klaus Krause <pkk@spth.de> - 2018-04-16 07:48 +0200
          Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-15 23:22 -0700
          Re: stdcbench benchmark Philipp Klaus Krause <pkk@spth.de> - 2018-04-16 11:52 +0200
        Re: stdcbench benchmark Philipp Klaus Krause <pkk@spth.de> - 2018-04-16 09:56 +0200
          Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-16 01:58 -0700
        Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-16 10:08 +0200
          Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 11:37 +0100
            Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-16 22:42 +1200
            Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-16 12:54 +0200
              Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 13:02 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-16 14:39 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 14:53 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-16 16:32 +0200
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-16 14:41 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 15:56 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-16 17:21 +0200
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-16 15:43 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 17:00 +0100
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-16 16:09 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 17:22 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 09:35 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 11:42 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 14:14 +0200
                Re: stdcbench benchmark Philipp Klaus Krause <pkk@spth.de> - 2018-04-17 15:49 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 18:45 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 23:00 +0200
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-17 21:18 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 23:20 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 09:27 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 11:30 +0100
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-18 03:43 -0700
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-18 22:58 +1200
                Re: stdcbench benchmark mark.bluemel@gmail.com - 2018-04-18 04:01 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 12:39 +0100
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-18 06:52 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 13:59 +0100
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-18 06:14 -0700
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-19 07:39 +1200
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-18 06:14 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 16:31 +0200
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-18 08:00 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 17:26 +0200
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-18 08:37 -0700
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-18 16:12 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 18:15 +0100
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-18 04:01 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 13:01 +0200
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-18 04:15 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 13:41 +0200
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-18 05:35 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 12:26 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 13:58 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 22:29 +0100
                Re: stdcbench benchmark Keith Thompson <kst-u@mib.org> - 2018-04-18 10:34 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 22:34 +0200
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 22:35 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-19 20:05 +0100
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-20 08:07 +1200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-19 23:34 +0100
                Re: stdcbench benchmark Keith Thompson <kst-u@mib.org> - 2018-04-19 16:05 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 00:18 +0100
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-25 23:12 +0000
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-20 16:15 +1200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 11:39 +0100
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-20 23:46 +1200
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-20 05:04 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 13:27 +0100
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-20 06:06 -0700
                Re: stdcbench benchmark supercat@casperkitty.com - 2018-04-20 13:05 -0700
                Re: stdcbench benchmark mark.bluemel@gmail.com - 2018-04-20 01:23 -0700
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-20 01:40 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 12:04 +0100
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-20 04:16 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 13:48 +0100
                Re: stdcbench benchmark Tim Rentsch <txr@alumni.caltech.edu> - 2018-04-23 11:53 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-23 20:33 +0100
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-26 01:00 -0700
                Re: stdcbench benchmark Keith Thompson <kst-u@mib.org> - 2018-04-20 09:17 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 19:25 +0100
                Re: stdcbench benchmark Keith Thompson <kst-u@mib.org> - 2018-04-20 11:58 -0700
                Re: stdcbench benchmark supercat@casperkitty.com - 2018-04-20 12:30 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 21:03 +0100
                Re: stdcbench benchmark Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-04-20 22:16 +0100
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 23:09 +0100
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 14:42 +0100
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-20 09:30 -0700
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-21 07:24 +1200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 20:43 +0100
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-21 07:59 +1200
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-21 08:01 +1200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 21:18 +0100
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-21 09:17 +1200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-20 23:15 +0100
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 02:14 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 09:54 +0200
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-18 01:21 -0700
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 11:40 +0100
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-18 11:26 +1200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-18 01:48 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-18 09:58 +0200
                Re: stdcbench benchmark Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-04-16 16:45 +0000
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-16 17:31 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 18:53 +0100
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-16 17:55 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 19:01 +0100
                Re: stdcbench benchmark Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-04-16 20:28 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-16 21:57 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 09:45 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 12:24 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 14:31 +0200
                Re: stdcbench benchmark Robert Wessel <robertwessel2@yahoo.com> - 2018-04-16 16:59 -0500
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 01:02 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 09:47 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 13:16 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 14:38 +0200
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-17 13:18 +0000
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 14:37 +0100
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-17 06:44 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 15:58 +0200
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-17 15:43 +0000
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-17 08:47 -0700
                Re: stdcbench benchmark Ian Collins <ian-news@hotmail.com> - 2018-04-17 08:04 +1200
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-16 20:30 +0000
                Re: stdcbench benchmark Melzzzzz <Melzzzzz@zzzzz.com> - 2018-04-16 16:31 +0000
                Re: stdcbench benchmark Keith Thompson <kst-u@mib.org> - 2018-04-20 14:22 -0700
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-17 00:42 -0700
              Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-16 07:00 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-16 16:35 +0200
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-16 09:28 -0700
                Re: stdcbench benchmark scott@slp53.sl.home (Scott Lurndal) - 2018-04-16 17:42 +0000
                Re: stdcbench benchmark Robert Wessel <robertwessel2@yahoo.com> - 2018-04-16 17:07 -0500
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-17 02:50 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 12:42 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 11:58 +0100
                Re: stdcbench benchmark Philipp Klaus Krause <pkk@spth.de> - 2018-04-17 14:01 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 13:40 +0100
                Re: stdcbench benchmark Philipp Klaus Krause <pkk@spth.de> - 2018-04-17 15:41 +0200
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 14:46 +0200
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-17 06:09 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 16:07 +0200
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 14:43 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 15:26 +0100
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-17 07:42 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 16:51 +0200
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-17 08:07 -0700
                Re: stdcbench benchmark Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-17 08:16 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 23:17 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 17:12 +0100
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 23:26 +0200
                Re: stdcbench benchmark bartc <bc@freeuk.com> - 2018-04-17 23:38 +0100
                Re: stdcbench benchmark Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-17 05:52 -0700
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 16:10 +0200
                Re: stdcbench benchmark David Brown <david.brown@hesbynett.no> - 2018-04-17 10:02 +0200
    Re: stdcbench benchmark Philipp Klaus Krause <pkk@spth.de> - 2018-04-15 23:20 +0200

csiph-web