Bug 701

Summary: inline HighPrecision Max () and Min () functions
Product: ns-3 Reporter: Andrey Mazo <ahippo>
Component: coreAssignee: ns-bugs <ns-bugs>
Status: RESOLVED FIXED    
Severity: enhancement CC: ahippo, mathieu.lacage
Priority: P3    
Version: ns-3-dev   
Hardware: All   
OS: All   
Attachments: Proposed patch

Description Andrey Mazo 2009-10-01 11:01:22 UTC 
0) Original code
 Command being timed: "build/optimized/examples/wifi-wired-bridging --nStas=4"
 User time (seconds): 403.23
 System time (seconds): 5.57
 Percent of CPU this job got: 98%
 Elapsed (wall clock) time (h:mm:ss or m:ss): 6:55.31

 Command being timed: "build/optimized/examples/mesh"
 User time (seconds): 256.20
 System time (seconds): 0.02
 Percent of CPU this job got: 99%
 Elapsed (wall clock) time (h:mm:ss or m:ss): 4:16.49

1) Modified code
 Command being timed: "build/optimized/examples/wifi-wired-bridging --nStas=4"
 User time (seconds): 389.68
 System time (seconds): 5.76
 Percent of CPU this job got: 98%
 Elapsed (wall clock) time (h:mm:ss or m:ss): 6:41.36

 Command being timed: "build/optimized/examples/mesh"
 User time (seconds): 232.67
 System time (seconds): 0.03
 Percent of CPU this job got: 99%
 Elapsed (wall clock) time (h:mm:ss or m:ss): 3:52.83


So, we're getting about 3-10% speed improvement.
Comment 1 Andrey Mazo 2009-10-01 11:02:16 UTC 
Created attachment 616 [details]
Proposed patch
Comment 2 Andrey Mazo 2009-10-01 11:13:14 UTC 
(In reply to comment #0)
> So, we're getting about 3-10% speed improvement.
Forgot to say, that:
1) revision -- 0ba73cdd2a43
2) compiler -- gcc-4.3.2
3) build -- static optimized
4) machine -- Intel Xeon @ 2.80GHz
5) examples are modified with attachment 608 [details] from bug 695 [1]


[1] http://www.nsnam.org/bugzilla/attachment.cgi?id=608
Comment 3 Mathieu Lacage 2009-11-24 04:45:26 UTC 
changeset: bb1eea10412f