25th March 2008

Attendees

• Adobe: Edwin, Jennifer, Scott, Erik, Rick, Dan
• Mozilla: Graydon, Benjamin, Mark, Chris
• Intel: Moh, Shengnan, Marsha, Karthik, Mingqui Sun

Action Items

• ACTION: Edwin/Scott/or Jennifer to send out call for action items each Monday- these will be posted on the wiki
• ACTION: Benjamin needs tom to review bug 423692
• ACTION: Edwin: raise the priority of fixing string implementation -- The TT string optimization bug is https://bugzilla.mozilla.org/show_bug.cgi?id=411163
• ACTION: Graydon: Per "callgrind" (call-graph profiler derived from "valgrind") - as hotspots are found, log bugs for them with profile data

Previous Action Items

• ACTION: moh will look at GCbench test and suggest some optimizations. -- looked at memset and memcopy; optimizations are already in visual studio. will look at other platforms.
• ACTION: tom will see if he can find additional GC/memset tests to recommend to moh and post to test directory. maybe GCheap?
• ACTION: graydon will investigate Google "Summer of Code" agenda -- we're welcome to propose items to present.

Updates

Edwin

• working on trace trees
  • main strategy is "pruning" so trees don't get so "bushy"
• how do people feel about meeting twice a month, instead of every week?
  • moh suggests it would be better to keep weekly meeting on the calendars
  • edwin, scott, or jennifer will send out a call for agenda items on mondays
    • if there are hot topics, we'll meet. if not, we won't.

Benjamin

• ACTION: needs tom to review bug 423692

Moh (Vtune)

• vtune patch for central has been checked in
  • instructions are posted on tamarin wiki

Karthik

• been trying to profile sunspider benchmark
  • string-unpack provided an opportunity for optimization -- 4-5% improvement
  • other benchmarks seem a bit too small for profling (run for less than 1 second)
• kathik will send patch to edwin, rick, or tom for review

Mark

• had been preparing for a conference, where discussed the future of mozilla and tamarin.
  • lots of excitement!
  • interest in ironmonkey
• will be catching up with compiler updates soon

Graydon

• has identified some more hotspots
• submitted patch for bug 424891 this week, which was more effective than all mini-tracing work so far. wow!
• ACTION: edwin wants to raise the priority of fixing string implementation -- The TT string optimization bug is https://bugzilla.mozilla.org/show_bug.cgi?id=411163
• steven is on vacation but interested in tracing
• ACTION: Per "callgrind" (call-graph profiler derived from "valgrind") - as hotspots are found, log bugs for them with profile data