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DATE 2009-09-01

HANGOUT

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MESSAGE
DATE 2009-09-16
FROM Paul Robert Marino
SUBJECT Subject: [NYLXS - HANGOUT] c++ threading question
From lestw-hangout-at-mrbrklyn.com Wed Sep 16 19:00:48 2009
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Message-ID: <4AB16E09.2060505-at-gmail.com>
Date: Wed, 16 Sep 2009 19:00:25 -0400
From: Paul Robert Marino
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To: hangout-at-mrbrklyn.com
Subject: [NYLXS - HANGOUT] c++ threading question
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I have a question thats a little more technical then we get on this list
about NPTL threading in Linux.
I know there is a way in NPTL (Native POSIX Threading Library) to do SMP
aware Kernel threads under Linux however I haven't seen any GPL or open
source applications that do it (other than Java but the code is too
massive for me to find it ) and as a result they are CPU Core bound. Now
I have seen closed source applications do it one of which was written by
a vendor for my job who I know did not use any libraries that do not
come with (GNU\)Red Hat Enterprise Linux 4.x. so far none of the
documentation I've seen on the subject of NPTL on Linux seem to really
explain how to do it only that its possible. does any one know what the
key to getting it to work is? In theory writing POSIX threading code on
Linux shouldn't be any different than Solaris's implementation of POSIX
threads however in Solaris it's just a simple matter of setting the
extent (which indicated the maximum number of cores the app can use) and
it just works however ti does not seem to do any thing under Linux
which makes me suspect that something needs to be added to the code to
specify that you want to create SMP aware kernel threads as opposed to
user mode, or non-SMP aware kernel threads possibly prior to setting the
extent. The other thing Ive noticed is I've seen threaded apps that will
use SMP aware when compiled on Solaris and not when they are compiled on
Linux.

  1. 2009-09-01 einker <eminker-at-gmail.com> Re: [NYLXS - HANGOUT] Next Meeting
  2. 2009-09-01 mlr52-at-michaellrichardson.com Subject: [NYLXS - HANGOUT] FW: [kde-announce] KDE 4.3.1 Provides a Wave of Improvements
  3. 2009-09-01 mlr52-at-michaellrichardson.com Re: [NYLXS - HANGOUT] Next Meeting
  4. 2009-09-01 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] Next Meeting
  5. 2009-09-01 Ruben Safir <mrbrklyn-at-panix.com> Subject: [NYLXS - HANGOUT] Vintage Computer Festival East - Sept. 12-13
  6. 2009-09-04 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] Next Meeting
  7. 2009-09-04 Elfen Magix <elfen_magix-at-yahoo.com> Re: [NYLXS - HANGOUT] Next Meeting
  8. 2009-09-04 Simon Fondrie-Teitler <simonft-at-gmail.com> Re: [NYLXS - HANGOUT] Next Meeting
  9. 2009-09-05 Simon Fondrie-Teitler <simonft-at-gmail.com> Re: [NYLXS - HANGOUT] Next Meeting
  10. 2009-09-07 Contrarian <adrba-at-nyct.net> Subject: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  11. 2009-09-07 Ron Guerin <ron-at-vnetworx.net> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  12. 2009-09-07 Contrarian <adrba-at-nyct.net> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  13. 2009-09-07 Contrarian <adrba-at-nyct.net> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  14. 2009-09-07 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  15. 2009-09-07 Ron Guerin <ron-at-vnetworx.net> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  16. 2009-09-08 Kevin Mark <kevin.mark-at-verizon.net> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  17. 2009-09-08 Ron Guerin <ron-at-vnetworx.net> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  18. 2009-09-08 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  19. 2009-09-08 Ron Guerin <ron-at-vnetworx.net> Re: [NYLXS - HANGOUT] any chance of getting a COBOL compiler
  20. 2009-09-09 Simon Fondrie-Teitler <simonft-at-gmail.com> Re: [NYLXS - HANGOUT] Next Meeting
  21. 2009-09-09 Ron Guerin <ron-at-vnetworx.net> Subject: [NYLXS - HANGOUT] [Fwd: [The Installfest Site] Comment: "Sunday August 16th, 2009,
  22. 2009-09-09 mlr52-at-michaellrichardson.com Subject: [NYLXS - HANGOUT] Were is everyone?
  23. 2009-09-09 Ron Guerin <ron-at-vnetworx.net> Re: [NYLXS - HANGOUT] Were is everyone?
  24. 2009-09-09 Elfen Magix <elfen_magix-at-yahoo.com> Re: [NYLXS - HANGOUT] Were is everyone?
  25. 2009-09-09 From: "Michael L. Richardson" <mlr52-at-michaellrichardson.com> Re: [NYLXS - HANGOUT] Were is everyone?
  26. 2009-09-09 From: "Michael L. Richardson" <mlr52-at-michaellrichardson.com> Re: [NYLXS - HANGOUT] Were is everyone?
  27. 2009-09-09 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] Were is everyone?
  28. 2009-09-09 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] Were is everyone?
  29. 2009-09-10 Ron Guerin <ron-at-vnetworx.net> Re: [NYLXS - HANGOUT] Were is everyone?
  30. 2009-09-10 Ron Guerin <ron-at-vnetworx.net> Re: [NYLXS - HANGOUT] Were is everyone?
  31. 2009-09-10 From: "Michael L. Richardson" <mlr52-at-michaellrichardson.com> Re: [NYLXS - HANGOUT] Were is everyone?
  32. 2009-09-16 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] Were is everyone?
  33. 2009-09-16 Ruben Safir <mrbrklyn-at-panix.com> Subject: [NYLXS - HANGOUT] In the spirit of the season...
  34. 2009-09-16 swd <sderrick-at-optonline.net> RE: [NYLXS - HANGOUT] In the spirit of the season...
  35. 2009-09-16 Ron Guerin <ron-at-vnetworx.net> Subject: [NYLXS - HANGOUT] Meeting about DebConf10 NYC tonight (rsvp by 4:30 or sign in at
  36. 2009-09-16 Paul Robert Marino <prmarino1-at-gmail.com> Subject: [NYLXS - HANGOUT] c++ threading question
  37. 2009-09-16 From: "Michael L. Richardson" <mlr52-at-michaellrichardson.com> Subject: [NYLXS - HANGOUT] [Fwd: [nylug-announce] [Fwd: Registration is open for Central PA
  38. 2009-09-18 Contrarian <adrba-at-nyct.net> Subject: [NYLXS - HANGOUT] Shanah Tovah 5770
  39. 2009-09-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] [Fwd: [nylug-announce] [Fwd: Registration is
  40. 2009-09-18 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] Shanah Tovah 5770
  41. 2009-09-18 Kevin Mark <kevin.mark-at-verizon.net> Re: [NYLXS - HANGOUT] Shanah Tovah 5770
  42. 2009-09-18 Ron Guerin <ron-at-vnetworx.net> Re: [NYLXS - HANGOUT] [Fwd: [nylug-announce] [Fwd: Registration is
  43. 2009-09-23 From: "Michael L. Richardson" <mlr52-at-michaellrichardson.com> Subject: [NYLXS - HANGOUT] [Fwd: FW: BEES]
  44. 2009-09-25 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] Shanah Tovah 5770
  45. 2009-09-26 mlr52-at-michaellrichardson.com Subject: [NYLXS - HANGOUT] FW: Promotion on Powerpack subscription: 3 months for free
  46. 2009-09-26 Simon Fondrie-Teitler <simonft-at-gmail.com> Re: [NYLXS - HANGOUT] FW: Promotion on Powerpack subscription: 3
  47. 2009-09-26 Kevin Mark <kevin.mark-at-verizon.net> Re: [NYLXS - HANGOUT] FW: Promotion on Powerpack subscription: 3
  48. 2009-09-27 Amy Coleman <acoleman-at-mrbrklyn.com> Re: [NYLXS - HANGOUT] Shanah Tovah 5770
  49. 2009-09-28 From: "Michael L. Richardson" <mlr52-at-michaellrichardson.com> Re: [NYLXS - HANGOUT] FW: Promotion on Powerpack subscription: 3
  50. 2009-09-29 Ruben Safir <mrbrklyn-at-panix.com> Re: [NYLXS - HANGOUT] FW: Promotion on Powerpack subscription: 3
  51. 2009-09-29 Simon Fondrie-Teitler <simonft-at-gmail.com> Re: [NYLXS - HANGOUT] FW: Promotion on Powerpack subscription: 3

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