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- ;;; -*- Mode: Lisp; Package: Lisp; Log: code.log -*-
- ;;;
- ;;; **********************************************************************
- ;;; This code was written as part of the CMU Common Lisp project at
- ;;; Carnegie Mellon University, and has been placed in the public domain.
- ;;; If you want to use this code or any part of CMU Common Lisp, please contact
- ;;; Scott Fahlman or slisp-group@cs.cmu.edu.
- ;;;
- (ext:file-comment
- "$Header: time.lisp,v 1.13 92/08/05 20:08:28 ram Exp $")
- ;;;
- ;;; **********************************************************************
- ;;;
- ;;; This file contains the definitions for the Spice Lisp time functions.
- ;;; They are mostly fairly straightforwardly implemented as calls to the
- ;;; time server.
- ;;;
- ;;; Written by Rob MacLachlan.
- ;;;
- (in-package 'lisp)
- (export '(internal-time-units-per-second get-internal-real-time
- get-internal-run-time get-universal-time
- get-decoded-time encode-universal-time decode-universal-time))
-
- (defconstant internal-time-units-per-second 100
- "The number of internal time units that fit into a second. See
- Get-Internal-Real-Time and Get-Internal-Run-Time.")
-
- (defconstant micro-seconds-per-internal-time-unit
- (/ 1000000 internal-time-units-per-second))
-
-
- (defmacro not-leap-year (year)
- (let ((sym (gensym)))
- `(let ((,sym ,year))
- (cond ((eq (mod ,sym 4) 0)
- (and (eq (mod ,sym 100) 0)
- (not (eq (mod ,sym 400) 0))))
- (T T)))))
-
-
- ;;; The base number of seconds for our internal "epoch". We initialize this to
- ;;; the time of the first call to G-I-R-T, and then subtract this out of the
- ;;; result.
- ;;;
- (defvar *internal-real-time-base-seconds* nil)
- (declaim (type (or (unsigned-byte 32) null) *internal-real-time-base-seconds*))
-
- ;;; Get-Internal-Real-Time -- Public
- ;;;
- (defun get-internal-real-time ()
- "Return the real time in the internal time format. This is useful for
- finding elapsed time. See Internal-Time-Units-Per-Second."
- (locally (declare (optimize (speed 3) (safety 0)))
- (multiple-value-bind (ignore seconds useconds) (unix:unix-gettimeofday)
- (declare (ignore ignore) (type (unsigned-byte 32) seconds useconds))
- (let ((base *internal-real-time-base-seconds*)
- (uint (truncate useconds
- micro-seconds-per-internal-time-unit)))
- (declare (type (unsigned-byte 32) uint))
- (cond (base
- (truly-the (unsigned-byte 32)
- (+ (the (unsigned-byte 32)
- (* (the (unsigned-byte 32) (- seconds base))
- internal-time-units-per-second))
- uint)))
- (t
- (setq *internal-real-time-base-seconds* seconds)
- uint))))))
-
-
- ;;; Get-Internal-Run-Time -- Public
- ;;;
- (defun get-internal-run-time ()
- "Return the run time in the internal time format. This is useful for
- finding CPU usage."
- (declare (values (unsigned-byte 32)))
- (locally (declare (optimize (speed 3) (safety 0)))
- (multiple-value-bind (ignore utime-sec utime-usec stime-sec stime-usec)
- (unix:unix-fast-getrusage unix:rusage_self)
- (declare (ignore ignore)
- (type (unsigned-byte 31) utime-sec stime-sec)
- (type (mod 1000000) utime-usec stime-usec))
- (+ (the (unsigned-byte 32)
- (* (the (unsigned-byte 32) (+ utime-sec stime-sec))
- internal-time-units-per-second))
- (truncate (+ utime-usec stime-usec)
- micro-seconds-per-internal-time-unit)))))
-
-
- ;;; Subtract from the returned Internal_Time to get the universal time.
- ;;; The offset between our time base and the Perq one is 2145 weeks and
- ;;; five days.
- ;;;
- (defconstant seconds-in-week (* 60 60 24 7))
- (defconstant weeks-offset 2145)
- (defconstant seconds-offset 432000)
- (defconstant minutes-per-day (* 24 60))
- (defconstant quarter-days-per-year (1+ (* 365 4)))
- (defconstant quarter-days-per-century 146097)
- (defconstant november-17-1858 678882)
- (defconstant weekday-november-17-1858 2)
- (defconstant unix-to-universal-time 2208988800)
-
- ;;; Make-Universal-Time -- Internal
- ;;;
- ;;; Convert a Unix Internal_Time into a universal time.
- ;;;
- (defun make-universal-time (weeks msec)
- (+ (* (- weeks weeks-offset) seconds-in-week)
- (- (truncate msec 1000) seconds-offset)))
-
-
- ;;; Get-Universal-Time -- Public
- ;;;
- ;;;
- (defun get-universal-time ()
- "Returns a single integer for the current time of
- day in universal time format."
- (multiple-value-bind (res secs) (unix:unix-gettimeofday)
- (declare (ignore res))
- (+ secs unix-to-universal-time)))
-
- (defun get-decoded-time ()
- "Returns nine values specifying the current time as follows:
- second, minute, hour, date, month, year, day of week (0 = Monday), T
- (daylight savings times) or NIL (standard time), and timezone."
- (decode-universal-time (get-universal-time)))
-
- (defun decode-universal-time (universal-time &optional time-zone)
- "Converts a universal-time to decoded time format returning the following
- nine values: second, minute, hour, date, month, year, day of week (0 =
- Monday), T (daylight savings time) or NIL (standard time), and timezone.
- Completely ignores daylight-savings-time when time-zone is supplied."
- (declare (type (or fixnum null) time-zone))
- (multiple-value-bind (weeks secs)
- (truncate (+ universal-time seconds-offset)
- seconds-in-week)
- (let ((weeks (+ weeks weeks-offset))
- (second NIL)
- (minute NIL)
- (hour NIL)
- (date NIL)
- (month NIL)
- (year NIL)
- (day NIL)
- (daylight NIL)
- (timezone (if (null time-zone)
- (multiple-value-bind (res s us tz)
- (unix:unix-gettimeofday)
- (declare (ignore s us))
- (if res tz 0))
- (* time-zone 60))))
- (declare (fixnum timezone))
- (multiple-value-bind (t1 seconds) (truncate secs 60)
- (setq second seconds)
- (setq t1 (- t1 timezone))
- (let* ((tday (if (< t1 0)
- (1- (truncate (1+ t1) minutes-per-day))
- (truncate t1 minutes-per-day))))
- (multiple-value-setq (hour minute)
- (truncate (- t1 (* tday minutes-per-day)) 60))
- (let* ((t2 (1- (* (+ (* weeks 7) tday november-17-1858) 4)))
- (tcent (truncate t2 quarter-days-per-century)))
- (setq t2 (mod t2 quarter-days-per-century))
- (setq t2 (+ (- t2 (mod t2 4)) 3))
- (setq year (+ (* tcent 100) (truncate t2 quarter-days-per-year)))
- (let ((days-since-mar0 (1+ (truncate (mod t2 quarter-days-per-year)
- 4))))
- (setq day (mod (+ tday weekday-november-17-1858) 7))
- (unless time-zone
- (if (setq daylight (dst-check days-since-mar0 hour day))
- (cond ((eq hour 23)
- (setq hour 0)
- (setq day (mod (1+ day) 7))
- (setq days-since-mar0 (1+ days-since-mar0))
- (if (>= days-since-mar0 366)
- (if (or (> days-since-mar0 366)
- (not-leap-year (1+ year)))
- (setq days-since-mar0 368))))
- (T (setq hour (1+ hour))))))
- (let ((t3 (+ (* days-since-mar0 5) 456)))
- (cond ((>= t3 1989)
- (setq t3 (- t3 1836))
- (setq year (1+ year))))
- (multiple-value-setq (month t3) (truncate t3 153))
- (setq date (1+ (truncate t3 5))))))))
- (values second minute hour date month year day
- daylight (truncate timezone 60)))))
-
- ;;; Encode-Universal-Time -- Public
- ;;;
- ;;; Just do a TimeUser:T_UserToInt. If the year is between 0 and 99 we
- ;;; have to figure out which the "obvious" year is.
- ;;;
-
- (defun encode-universal-time (second minute hour date month year
- &optional time-zone)
- "The time values specified in decoded format are converted to
- universal time, which is returned."
- (let* ((year (if (< year 100)
- (multiple-value-bind (sec min hour day month now-year)
- (get-decoded-time)
- (declare (ignore sec min hour day month))
- (do ((y (+ year (* 100 (1- (truncate now-year 100))))
- (+ y 100)))
- ((<= (abs (- y now-year)) 50) y)))
- year))
- (zone (if time-zone (* time-zone 60)
- (multiple-value-bind (res s us tz) (unix:unix-gettimeofday)
- (declare (ignore s us))
- (if res tz))))
- (tmonth (- month 3)))
- (cond ((< tmonth 0)
- (setq tmonth (+ tmonth 12))
- (setq year (1- year))))
- (let ((days-since-mar0 (+ (truncate (+ (* tmonth 153) 2) 5) date)))
- (multiple-value-bind (tcent tyear) (truncate year 100)
- (let* ((tday (- (+ (truncate (* tcent quarter-days-per-century) 4)
- (truncate (* tyear quarter-days-per-year) 4)
- days-since-mar0)
- november-17-1858))
- (daylight (dst-check days-since-mar0 (1- hour)
- (mod (+ tday weekday-november-17-1858) 7)))
- (tminutes (+ (* hour 60) minute zone)))
- (if daylight (setq tminutes (- tminutes 60)))
- (do ((i tminutes (+ i minutes-per-day)))
- ((>= i 0) (setq tminutes i))
- (declare (fixnum i))
- (decf tday 1))
- (do ((i tminutes (- i minutes-per-day)))
- ((< i minutes-per-day) (setq tminutes i))
- (declare (fixnum i))
- (incf tday 1))
- (multiple-value-bind (weeks dpart) (truncate tday 7)
- (make-universal-time weeks (* (+ (* (+ (* dpart minutes-per-day)
- tminutes) 60)
- second) 1000))))))))
-
- ;;; Dst-check -- Internal
- (defconstant april-1 (+ (truncate (+ (* (- 4 3) 153) 2) 5) 1))
- (defconstant october-31 (+ (truncate (+ (* (- 10 3) 153) 2) 5) 31))
-
- (eval-when (compile eval)
-
- (defmacro dst-check-start-of-month-ge (day hour weekday daybound)
- (let ((d (gensym))
- (h (gensym))
- (w (gensym))
- (db (gensym)))
- `(let ((,d ,day)
- (,h ,hour)
- (,w ,weekday)
- (,db ,daybound))
- (declare (fixnum ,d ,h ,w ,db))
- (cond ((< ,d ,db) NIL)
- ((> (the fixnum (- ,d ,w)) ,db) T)
- ((and (eq ,w 6) (> ,h 0)) T)
- (T NIL)))))
-
- (defmacro dst-check-end-of-month-ge (day hour weekday daybound)
- (let ((d (gensym))
- (h (gensym))
- (w (gensym))
- (db (gensym)))
- `(let ((,d ,day)
- (,h ,hour)
- (,w ,weekday)
- (,db ,daybound))
- (declare (fixnum ,d ,h ,w ,db))
- (cond ((< (the fixnum (+ ,d 6)) ,db) NIL)
- ((> (the fixnum (- (the fixnum (+ ,d 6)) ,w)) ,db) T)
- ((and (eq ,w 6) (> ,h 0)) T)
- (T NIL)))))
- )
-
- (defun dst-check (day hour weekday)
- (and (dst-check-start-of-month-ge day hour weekday april-1)
- (not (dst-check-end-of-month-ge day hour weekday october-31))))
-
- ;;;; Time:
-
- (defmacro time (form)
- "Evaluates the Form and prints timing information on *Trace-Output*."
- `(%time #'(lambda () ,form)))
-
- ;;; MASSAGE-TIME-FUNCTION -- Internal
- ;;;
- ;;; Try to compile the closure arg to %TIME if it is interpreted.
- ;;;
- (defun massage-time-function (fun)
- (cond
- ((eval:interpreted-function-p fun)
- (multiple-value-bind (def env-p)
- (function-lambda-expression fun)
- (declare (ignore def))
- (cond
- (env-p
- (warn "TIME form in a non-null environment, forced to interpret.~@
- Compiling entire form will produce more accurate times.")
- fun)
- (t
- (compile nil fun)))))
- (t fun)))
-
- ;;; TIME-GET-SYS-INFO -- Internal
- ;;;
- ;;; Return all the files that we want time to report.
- ;;;
- (defun time-get-sys-info ()
- (multiple-value-bind (user sys faults)
- (system:get-system-info)
- (values user sys faults (get-bytes-consed))))
-
- ;;; %TIME -- Internal
- ;;;
- ;;; The guts of the TIME macro. Compute overheads, run the (compiled)
- ;;; function, report the times.
- ;;;
- (defun %time (fun)
- (let ((fun (massage-time-function fun))
- old-run-utime
- new-run-utime
- old-run-stime
- new-run-stime
- old-real-time
- new-real-time
- old-page-faults
- new-page-faults
- real-time-overhead
- run-utime-overhead
- run-stime-overhead
- page-faults-overhead
- old-bytes-consed
- new-bytes-consed
- cons-overhead)
- ;; Calculate the overhead...
- (multiple-value-setq
- (old-run-utime old-run-stime old-page-faults old-bytes-consed)
- (time-get-sys-info))
- ;; Do it a second time to make sure everything is faulted in.
- (multiple-value-setq
- (old-run-utime old-run-stime old-page-faults old-bytes-consed)
- (time-get-sys-info))
- (multiple-value-setq
- (new-run-utime new-run-stime new-page-faults new-bytes-consed)
- (time-get-sys-info))
- (setq run-utime-overhead (- new-run-utime old-run-utime))
- (setq run-stime-overhead (- new-run-stime old-run-stime))
- (setq page-faults-overhead (- new-page-faults old-page-faults))
- (setq old-real-time (get-internal-real-time))
- (setq old-real-time (get-internal-real-time))
- (setq new-real-time (get-internal-real-time))
- (setq real-time-overhead (- new-real-time old-real-time))
- (setq cons-overhead (- new-bytes-consed old-bytes-consed))
- ;; Now get the initial times.
- (multiple-value-setq
- (old-run-utime old-run-stime old-page-faults old-bytes-consed)
- (time-get-sys-info))
- (setq old-real-time (get-internal-real-time))
- (let ((start-gc-run-time *gc-run-time*))
- (multiple-value-prog1
- ;; Execute the form and return its values.
- (funcall fun)
- (multiple-value-setq
- (new-run-utime new-run-stime new-page-faults new-bytes-consed)
- (time-get-sys-info))
- (setq new-real-time (- (get-internal-real-time) real-time-overhead))
- (let ((gc-run-time (max (- *gc-run-time* start-gc-run-time) 0)))
- (format *trace-output*
- "~&Evaluation took:~% ~
- ~S second~:P of real time~% ~
- ~S second~:P of user run time~% ~
- ~S second~:P of system run time~% ~
- ~@[[Run times include ~S second~:P GC run time]~% ~]~
- ~S page fault~:P and~% ~
- ~S bytes consed.~%"
- (max (/ (- new-real-time old-real-time)
- (float internal-time-units-per-second))
- 0.0)
- (max (/ (- new-run-utime old-run-utime) 1000000.0) 0.0)
- (max (/ (- new-run-stime old-run-stime) 1000000.0) 0.0)
- (unless (zerop gc-run-time)
- (/ (float gc-run-time)
- (float internal-time-units-per-second)))
- (max (- new-page-faults old-page-faults) 0)
- (max (- new-bytes-consed old-bytes-consed) 0)))))))
-