module/system/vm/profile.scm

   1 ;;; Guile VM profiler
   2
   3 ;; Copyright (C) 2001 Free Software Foundation, Inc.
   4
   5 ;;; This library is free software; you can redistribute it and/or
   6 ;;; modify it under the terms of the GNU Lesser General Public
   7 ;;; License as published by the Free Software Foundation; either
   8 ;;; version 3 of the License, or (at your option) any later version.
   9 ;;;
  10 ;;; This library is distributed in the hope that it will be useful,
  11 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 ;;; Lesser General Public License for more details.
  14 ;;;
  15 ;;; You should have received a copy of the GNU Lesser General Public
  16 ;;; License along with this library; if not, write to the Free Software
  17 ;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18
  19 ;;; Code:
  20
  21 (define-module (system vm profile)
  22   #:use-module (system vm vm)
  23   #:use-module (ice-9 format)
  24   #:export (vm-profile))
  25
  26 (define (vm-profile vm objcode . opts)
  27   (let ((flag (vm-option vm 'debug)))
  28     (dynamic-wind
  29         (lambda ()
  30           (set-vm-option! vm 'debug #t)
  31           (set-vm-option! vm 'profile-data '())
  32           (add-hook! (vm-next-hook vm) profile-next)
  33           (add-hook! (vm-enter-hook vm) profile-enter)
  34           (add-hook! (vm-exit-hook vm) profile-exit))
  35         (lambda ()
  36           (vm-load vm objcode)
  37           (print-result vm))
  38         (lambda ()
  39           (set-vm-option! vm 'debug flag)
  40           (remove-hook! (vm-next-hook vm) profile-next)
  41           (remove-hook! (vm-enter-hook vm) profile-enter)
  42           (remove-hook! (vm-exit-hook vm) profile-exit)))))
  43
  44 (define (profile-next vm)
  45   (set-vm-option! vm 'profile-data
  46                   (cons (vm-fetch-code vm) (vm-option vm 'profile-data))))
  47
  48 (define (profile-enter vm)
  49   #f)
  50
  51 (define (profile-exit vm)
  52   #f)
  53
  54 (define (print-result vm . opts)
  55   (do ((data (vm-option vm 'profile-data) (cdr data))
  56        (summary '() (let ((inst (caar data)))
  57                       (assq-set! summary inst
  58                                  (1+ (or (assq-ref summary inst) 0))))))
  59       ((null? data)
  60        (display "Count  Instruction\n")
  61        (display "-----  -----------\n")
  62        (for-each (lambda (entry)
  63                    (format #t "~5@A  ~A\n" (cdr entry) (car entry)))
  64                  (sort summary (lambda (e1 e2) (> (cdr e1) (cdr e2))))))))