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#!/bin/sh
# -*- Scheme -*-
exec ${GUILE-guile} --no-debug -q -l "$0" \
-c '(apply main (command-line))' "$@"
!#
;;; Copyright (C) 2008 Free Software Foundation, Inc.
;;;
;;; This program is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 2, or (at your option)
;;; any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this software; see the file COPYING. If not, write to
;;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;;; Boston, MA 02110-1301 USA
(use-modules (ice-9 format)
(ice-9 rdelim)
(ice-9 regex)
(srfi srfi-1))
(define (memory-mappings pid)
"Return an list of alists, each of which contains information about a
memory mapping of process @var{pid}. This information is obtained by reading
@file{/proc/PID/smaps} on Linux. See `procs(5)' for details."
(define mapping-line-rx
(make-regexp
"^([[:xdigit:]]+)-([[:xdigit:]]+) ([rwx-]{3}[ps]) ([[:xdigit:]]+) [0-9]{2}:[0-9]{2} [0-9]+[[:blank:]]+(.*)$"))
(define rss-line-rx
(make-regexp
"^Rss:[[:blank:]]+([[:digit:]]+) kB$"))
(with-input-from-port (open-input-file (format #f "/proc/~a/smaps" pid))
(lambda ()
(let loop ((line (read-line))
(result '()))
(if (eof-object? line)
(reverse result)
(cond ((regexp-exec mapping-line-rx line)
=>
(lambda (match)
(let ((mapping-start (string->number
(match:substring match 1)
16))
(mapping-end (string->number
(match:substring match 2)
16))
(access-bits (match:substring match 3))
(name (match:substring match 5)))
(loop (read-line)
(cons `((mapping-start . ,mapping-start)
(mapping-end . ,mapping-end)
(access-bits . ,access-bits)
(name . ,(if (string=? name "")
#f
name)))
result)))))
((regexp-exec rss-line-rx line)
=>
(lambda (match)
(let ((section+ (cons (cons 'rss
(string->number
(match:substring match 1)))
(car result))))
(loop (read-line)
(cons section+ (cdr result))))))
(else
(loop (read-line) result))))))))
(define (total-heap-size pid)
"Return the total heap size of process @var{pid}."
(define heap-or-anon-rx
(make-regexp "\\[(heap|anon)\\]"))
(define private-mapping-rx
(make-regexp "^[r-][w-][x-]p$"))
(fold (lambda (heap total+rss)
(let ((name (assoc-ref heap 'name))
(perm (assoc-ref heap 'access-bits)))
;; Include anonymous private mappings.
(if (or (and (not name)
(regexp-exec private-mapping-rx perm))
(and name
(regexp-exec heap-or-anon-rx name)))
(let ((start (assoc-ref heap 'mapping-start))
(end (assoc-ref heap 'mapping-end))
(rss (assoc-ref heap 'rss)))
(cons (+ (car total+rss) (- end start))
(+ (cdr total+rss) rss)))
total+rss)))
'(0 . 0)
(memory-mappings pid)))
(define (display-stats start end)
(define (->usecs sec+usecs)
(+ (* 1000000 (car sec+usecs))
(cdr sec+usecs)))
(let ((usecs (- (->usecs end) (->usecs start)))
(heap-size (total-heap-size (getpid)))
(gc-heap-size (assoc-ref (gc-stats) 'heap-size)))
(format #t "execution time: ~6,3f seconds~%"
(/ usecs 1000000.0))
(and gc-heap-size
(format #t "GC-reported heap size: ~8d B (~1,2f MiB)~%"
gc-heap-size
(/ gc-heap-size 1024.0 1024.0)))
(format #t "heap size: ~8d B (~1,2f MiB)~%"
(car heap-size)
(/ (car heap-size) 1024.0 1024.0))
(format #t "heap RSS: ~8d KiB (~1,2f MiB)~%"
(cdr heap-size)
(/ (cdr heap-size) 1024.0))
;; (system (format #f "cat /proc/~a/smaps" (getpid)))
;; (system (format #f "exmtool procs | grep -E '^(PID|~a)'" (getpid)))
))
(define (main . args)
(if (not (= (length args) 2))
(begin
(format #t "Usage: run FILE.SCM
Load FILE.SCM, a Guile Scheme source file, and report its execution time and
final heap usage.~%")
(exit 1)))
(let ((prog (cadr args))
(start (gettimeofday)))
(format #t "running `~a'...~%" prog)
(dynamic-wind
(lambda ()
#t)
(lambda ()
(set! quit (lambda args args))
(load prog))
(lambda ()
(let ((end (gettimeofday)))
(format #t "done~%")
(display-stats start end))))))
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