Yipeng Huang http://yipenghuang.com Ph.D. student in computer science at Columbia University Fri, 08 Mar 2013 05:23:47 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 Profiling parallel programs that use message passing mechanisms http://yipenghuang.com/2013/03/profiling-parallel-programs-that-use-message-passing-mechanisms/ http://yipenghuang.com/2013/03/profiling-parallel-programs-that-use-message-passing-mechanisms/#comments Fri, 08 Mar 2013 05:23:47 +0000 yipenghuang0302 http://yipenghuang.com/?p=805 A key question is how to do both call graph profiling and optimization for applications that are composed of multiple processes or run on multiple nodes. Full system profilers such as sysprof, oprofile are adept at measuring which processes take the most time on a single node. However, profiling and optimizing across multiple nodes is [...]]]> http://yipenghuang.com/2013/03/profiling-parallel-programs-that-use-message-passing-mechanisms/feed/ 0 Academic Writing Final Assignment—Reflection http://yipenghuang.com/2013/02/academic-writing-final-assignment-reflection/ http://yipenghuang.com/2013/02/academic-writing-final-assignment-reflection/#comments Thu, 28 Feb 2013 16:48:02 +0000 yipenghuang0302 http://yipenghuang.com/?p=800 We all have our writing mannerisms. One of mine is the three-item list:

“…attend meetings, email, and brainstorm…”

“…mode of locomotion, sensing ability, and the extent of robot automation…”

“…visual sensing, complex AI, and dynamic body control…”

“…planning, sensing, and motor control…”

“…SPEC for general [...]]]> http://yipenghuang.com/2013/02/academic-writing-final-assignment-reflection/feed/ 0 Draft #ifihadglass http://yipenghuang.com/2013/02/draft-ifihadglass/ http://yipenghuang.com/2013/02/draft-ifihadglass/#comments Wed, 27 Feb 2013 17:00:43 +0000 yipenghuang0302 http://yipenghuang.com/?p=796 A Google Glass device is the opposite of a telepresence robot: the former, a humanized computer; the latter, a computerized human.

Telepresence robots are brilliant for allowing someone to sense an environment and interact with far away people while staying put—giving mobility to someone who is forced to be stationary.

Along these lines, the brilliance [...]]]> http://yipenghuang.com/2013/02/draft-ifihadglass/feed/ 0 Updates http://yipenghuang.com/2013/02/updates/ http://yipenghuang.com/2013/02/updates/#comments Tue, 05 Feb 2013 21:41:49 +0000 yipenghuang0302 http://yipenghuang.com/?p=790 webot—upenn darwin
webots runs the compiled robot code in its closed source environment
interposition workaround
-finstrument-functions
–wrap=symbol
there are plenty and direct calls to atan, acos, asin
lib/matlab/wb_: these are library calls to virtual sensors and virtual actuators
the upenn case is not a good starting point because [...]]]> http://yipenghuang.com/2013/02/updates/feed/ 0 Progress http://yipenghuang.com/2012/11/progress/ http://yipenghuang.com/2012/11/progress/#comments Fri, 09 Nov 2012 22:09:45 +0000 yipenghuang0302 http://yipenghuang.com/?p=774 mcpat will complement gem5
there is a tie in module to m5 outputs
gem5 takes care of timing
mcpat takes care area
gem5 + mcpat take care of power
played with wattch; requires simplescalar simulator
i set up gem5 to have a hardware bring up: inorder, poo, ooo+vector
[...]]]> http://yipenghuang.com/2012/11/progress/feed/ 0