Prism User's Guide - CSAIL People - MIT

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Y?1
Pamiwc Data E
PM Total 198.7 6 X
Node cpu (user) 1 38.2
Node cpu (system) 1 150.1 X
Comm (Send/Get)
Comm (NEWS)
Comm (Reductions) 0 7.6 X
Corm (PM Node) 10.0 X
Node not profiled
Node I/0
Node+Comm Total I 196.0 X
MAIN Io.1 x
loop I 50.0 X
results
Figure 33. The Performance Data window.
Prism User 's Guide
File Optlons Help Total time: BJ0 a Mode: flat 0
Resources Resource: Node cpu (system)
Procedure: loop
subroutine loop(n, identity, primes, candid)
logical primes(n), candid(n)
integer dentty(n)
integer i. n. nextprime
C
C Loop: Find next valid candidate, mark it as a prime,
C invalidate all multiples as candidates, repeat.
C
nextprime = 2
do while (nextprime le. sqrt(real(n)))
primes(nextprime) = true.
candid(nextprime:n:nextprime) = false. '149.9
nextprime = minval(ldentit, 1. candid)
end do
C
The Performance Data window contains three levels of performance data:
* Performance statistics for the resources that Prism measures, along with
totals for each of the two subsystems.
Per-procedure performance statistics for a specified resource or subsystem.
You can choose either flat or call-graph display of these statistics.
Per-source-line performance statistics for a specified resource and
procedure.
All statistics are displayed as histograms in panes within the Performance Data
window, along with the percentage or the amount of time that the histogram bar
represents. If the program didn't use the resource, the histogram bar does not
appear. (Occasionally, however, a resource will show a utilization of 0% because
of rounding.) The total amount of execution time and the display mode for procedures
(flat or call-graph) is displayed at the top of the window.
Version 1.2, March 1993
Copyright C) 1993 Thinking Machines Corporation
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