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:''These updates concern Tamarin and related projects only.''
:''These updates concern Tamarin and related projects only.''


'''Meeting Details'''
'''Meeting Details (Changed as of 11/18/08)'''
* 2:00pm Pacific Time (21:00 UTC) on Tuesdays
* 10:00 AM Pacific Time (18:00 UTC) on Tuesdays
** (5PM Eastern US, 11PM Oslo, 6AM (Wed) Seoul, 7AM (Wed) Melbourne)
** 1PM Eastern US, 7PM Oslo, 3AM (Wed) Seoul, 5AM (Wed) Melbourne  
* Location: Tel: 877-220-5439 (US & Canada), +1-408-536-9900(International)
** Meeting Place ID: 2000
* join irc.mozilla.org #tamarin for attendance taking and questions


* Location: Tel: 866 705 2554 (us), 913 227 1201 (int’l)
** Passcode: 9140087
* Duration: 60 minutes
* join irc.mozilla.org #tamarin for attendence taking and questions


* '''Next week's Agenda Items:'''
'''Next meeting's Agenda Items (3/17/09):'''
** (Scott/Adobe)- Discuss new "updating agenda items" plan
* Canceled
** (Moh/Intel)-
*** We have prototyped a routine for fast scanning of memory and skipping large blocks of zeros. This routine seems particularly useful for TT's ZCT::PinStackObjects hot loop on a number of benchmarks.
*** A similar, but slightly different, pattern in the hot loop of _pcre_valid_utf8 also benefits from this optimization and results in 15% to 25% performance gain in Sunspider/string-unpack-code.
*** AvmCore::use_sse2() needs to cache the CPUID information as done in TC. Sunspider/string-fasta improves by 10% as a result. 
** (Edwin/Adobe)- Discuss ABC->Forth generation @runtime, preliminary #s






= 15th April 2008 =


= January 27, 2009 Meeting Notes =
== Attendees ==
== Attendees ==
Jeff,  Steven, Brent, Tom, Dan Schaffer, Rick Reitmaier, Rob Winchell, Moh
== Agenda Topics ==
* Status Updates


* Adobe: Ed, Jennifer, Scott, Rick, Steven
== Meeting Discussion Notes ==
* Mozilla: Graydon, Brendan
=== Status Updates ===
* Intel: Moh, Shengnan, Karthik


== Action Items ==
Jeff:
* Checked in a verifier refactoring. Some cleanup needed, but wanted to get it in.
* Put in a pipeline architecture where all code generators are driven off of api (similar to backend nanojit api)


* '''ACTION:''' Assign someone to create a patch for flag in AVM core
*’’’ACTION:’’’ Jim from Mozilla to work with Moh on strings


== Previous Action Items ==
Steven
* Spot bug fixing


* '''ACTION:''' Edwin/Scott/or Jennifer to send out call for action items each Monday- these will be posted on the wiki
Dan Schaffer
* '''ACTION:''' Benjamin needs tom to review {{bug|423692}}
* Ecma 3 data acceptance tests
* '''ACTION:''' Edwin: raise the priority of fixing string implementation -- The TT string optimization bug is https://bugzilla.mozilla.org/show_bug.cgi?id=411163 DONE
* If anyone sees any failures, send Dan Schaffer an email
* '''ACTION:''' Graydon: Per "callgrind" (call-graph profiler derived from "valgrind") - as hotspots are found, log bugs for them with profile data
* There may still be some lurking problems


Tom Harwood
* Global optimizer stopped working on this for now
* Starting to work on verifier and code generators instead
* Jeff’s change broke GO code
* Tom filed a bug on that. Copy Jeff on that but.


== Updates ==
‘’’Moh’’’
* Working on performance opportunities w/ tracing. Have prototyped a routine for fast scanning of memory and skipping large blocks of zeros. This routine seems particularly useful for TT's ZCT::PinStackObjects hot loop on a number of benchmarks
**Is there any plan for major changes w/ garbage collection, etc., that would make these new changes irrelevant?
***Ed says that Garbage collector is stable and they will continue to want to look into this (could go into central as well)
*A similar, but slightly different, pattern in the hot loop of _pcre_valid_utf8 also benefits from this optimization and results in 15% to 25% performance gain in Sunspider/string-unpack-code
*No person is yet assigned to strings, but Adobe/Mozilla will want to coordinate with Moh on this
**Jim from Mozilla will be working on this when he is back.
*CPUID Instruction: Need a flag in AVM core: Ed thinks we should just create a patch and do it.  No one is assigned to this yet.
'''Ed'''
* ABC->Forth generation @runtime, preliminary #s.  Ed is working on change to tracking, working on Forth codebase.  Interpreter of ABC’s are compiled into IL.  This gives us a place to put static optimizations.  Thus, the interpreter runs faster as is only keeping track of one location and are optimizing the code before interpreting it.
**Because of this, is working on code for managing the IL cache.  It’s a change in body plan for tamarin tracing
**Creates no real change to Forth language and is focused on single pass


= Older meetings =
= Older meetings =
* [[Tamarin:WeeklyUpdates/2009-01-27|January 27, 2009]]
* [[Tamarin:WeeklyUpdates/2009-01-013|January 13, 2009]]
* [[Tamarin:WeeklyUpdates/2009-01-06|January 6, 2009]]
* [[Tamarin:WeeklyUpdates/2008-12-16|December 16, 2008]]
* [[Tamarin:WeeklyUpdates/2008-12-09|December 9, 2008]]
* [[Tamarin:WeeklyUpdates/2008-12-03|December 3, 2008]]
* [[Tamarin:WeeklyUpdates/2008-11-18|November 18, 2008]]
* [[Tamarin:WeeklyUpdates/2008-11-11|November 11, 2008]]
* [[Tamarin:WeeklyUpdates/2008-09-30|September 30, 2008]]
* [[Tamarin:WeeklyUpdates/2008-08-26|August 26, 2008]]
* [[Tamarin:WeeklyUpdates/2008-08-12|August 12, 2008]]
* [[Tamarin:WeeklyUpdates/2008-07-22|July 22, 2008]]
* [[Tamarin:WeeklyUpdates/2008-07-15|July 15, 2008]]
* [[Tamarin:WeeklyUpdates/2008-07-01|July 1, 2008]]
* [[Tamarin:WeeklyUpdates/2008-06-24|June 24, 2008]]
* [[Tamarin:WeeklyUpdates/2008-06-17|June 17, 2008]]
* [[Tamarin:WeeklyUpdates/2008-06-10|June 10, 2008]]
* [[Tamarin:WeeklyUpdates/2008-06-03|June 3, 2008]]
* [[Tamarin:WeeklyUpdates/2008-05-20|May 20, 2008]]
* [[Tamarin:WeeklyUpdates/2008-05-06|May 6, 2008]]
* [[Tamarin:WeeklyUpdates/2008-04-15|April 15, 2008]]
* [[Tamarin:WeeklyUpdates/2008-03-25|March 25, 2008]]
* [[Tamarin:WeeklyUpdates/2008-03-25|March 25, 2008]]
* [[Tamarin:WeeklyUpdates/2008-03-18|March 18, 2008]]
* [[Tamarin:WeeklyUpdates/2008-03-18|March 18, 2008]]

Latest revision as of 00:52, 17 March 2009

These updates concern Tamarin and related projects only.

Meeting Details (Changed as of 11/18/08)

  • 10:00 AM Pacific Time (18:00 UTC) on Tuesdays
    • 1PM Eastern US, 7PM Oslo, 3AM (Wed) Seoul, 5AM (Wed) Melbourne
  • Location: Tel: 877-220-5439 (US & Canada), +1-408-536-9900(International)
    • Meeting Place ID: 2000
  • join irc.mozilla.org #tamarin for attendance taking and questions


Next meeting's Agenda Items (3/17/09):

  • Canceled



January 27, 2009 Meeting Notes

Attendees

Jeff, Steven, Brent, Tom, Dan Schaffer, Rick Reitmaier, Rob Winchell, Moh

Agenda Topics

  • Status Updates

Meeting Discussion Notes

Status Updates

Jeff:

  • Checked in a verifier refactoring. Some cleanup needed, but wanted to get it in.
  • Put in a pipeline architecture where all code generators are driven off of api (similar to backend nanojit api)


Steven

  • Spot bug fixing

Dan Schaffer

  • Ecma 3 data acceptance tests
  • If anyone sees any failures, send Dan Schaffer an email
  • There may still be some lurking problems

Tom Harwood

  • Global optimizer stopped working on this for now
  • Starting to work on verifier and code generators instead
  • Jeff’s change broke GO code
  • Tom filed a bug on that. Copy Jeff on that but.


Older meetings

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