--- /dev/null
+To: partain@dcs.gla.ac.uk
+cc: areid@dcs.gla.ac.uk, andy@dcs.gla.ac.uk
+Subject: Heap profiling programs
+Date: Thu, 09 Dec 93 17:33:09 +0000
+From: Alastair Reid <areid@dcs.gla.ac.uk>
+
+
+I've hacked up a couple of programs which it might be worth putting in
+the next ghc distribution. They are:
+
+graph:
+
+ Draws a continuous graph of any one column of the statistics
+ produced using the "+RTS -Sstderr" option.
+
+ I'm not convinced this is astonishingly useful since I'm yet to
+ learn anything useful from (manually) examining these statistics.
+ (Although I do vaguely remember asking Patrick if the heap profiler
+ could do stack profiles too.)
+
+ A typical usage is:
+
+ slife 2 Unis/gardenofeden +RTS -Sstderr -H1M -RTS |& graph 2
+
+ which draws a graph of the third column (ie column 2!) of the
+ stats.
+
+ (btw is there a neater way of connecting stderr to graph's stdin?)
+
+hpView2:
+
+ Draws a continuous graph of the statistics reported by the "+RTS -h"
+ option.
+
+ Since I understand what the figures mean, this seems to be the more
+ useful program.
+
+ A typical usage is:
+
+ mkfifo slife.hp
+ hpView2 slife.hp Main:mkQuad &
+ slife 2 Unis/gardenofeden +RTS -h -i0.1 -RTS
+ rm slife.hp
+
+ which draws a graph of the total heap usage and the usage for Main:mkQuad.
+
+
+Minor problems:
+
+The code is a gross hack... but it works. (Maybe distribute in rot13
+format so that you don't get accidentally get exposed to obscene code
+:-))
+
+The code uses a variant of Andy's picoXlibrary (which he was talking
+about releasing but maybe isn't ready to do yet.)
+
+Also, there are lots of obvious extensions etc which could be made but
+haven't yet... (The major one is being able to set the initial
+scale-factor for displaying the graphs or being able to graph several
+stats at once without having to tee.)
+
+
+Hope you find them interesting.
+
+Alastair
+
+ps Code is in ~areid/hask/Life and should be readable/executable.
projects / ghc-hetmet.git / blobdiff