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(*
Title: Standard Basis Library: Timer Signature and structure.
Author: David Matthews
Copyright David Matthews 2000, 2005, 2008
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
(* G&R 2004 status: updated. Added checkCPUTimes. *)
signature TIMER =
sig
type cpu_timer
type real_timer
val startCPUTimer : unit -> cpu_timer
val checkCPUTimer : cpu_timer -> {usr : Time.time, sys : Time.time}
val checkGCTime : cpu_timer -> Time.time
val totalCPUTimer : unit -> cpu_timer
val startRealTimer : unit -> real_timer
val checkRealTimer : real_timer -> Time.time
val totalRealTimer : unit -> real_timer
val checkCPUTimes : cpu_timer ->
{
nongc: { usr : Time.time, sys : Time.time},
gc: { usr : Time.time, sys : Time.time}
}
end
structure Timer :> TIMER =
struct
type cpu_timer = {userTime: Time.time, sysTime: Time.time, gcUTime: Time.time, gcSTime: Time.time }
type real_timer = Time.time
local
open Time
val doCall: int*unit -> Time.time
= RunCall.run_call2 RuntimeCalls.POLY_SYS_timing_dispatch
fun getUserTime() = doCall(7, ())
and getSysTime() = doCall(8, ())
and getGCUTime() = doCall(9, ())
and getGCSTime() = doCall(13, ())
in
fun startCPUTimer () =
{userTime=getUserTime(),
sysTime=getSysTime(),
gcUTime=getGCUTime(),
gcSTime=getGCSTime() }
and checkCPUTimer ({ userTime, sysTime, ...}: cpu_timer) =
{ usr = getUserTime() - userTime, sys = getSysTime() - sysTime}
and checkGCTime ({ gcUTime, ...}: cpu_timer) = getGCUTime() - gcUTime
and totalCPUTimer () =
{ userTime=Time.zeroTime, sysTime=Time.zeroTime, gcUTime=Time.zeroTime, gcSTime=Time.zeroTime }
fun checkCPUTimes (timer as { gcUTime, gcSTime, ... }) =
let
val { usr, sys } = checkCPUTimer timer
val gc_usr = getGCUTime() - gcUTime and gc_sys = getGCSTime() - gcSTime
in
{ gc = { usr = gc_usr, sys = gc_sys },
nongc = { usr = usr-gc_usr, sys = sys-gc_sys } }
end
fun totalRealTimer() = Time.zeroTime
and startRealTimer() = doCall(10, ())
and checkRealTimer t = startRealTimer() - t
end
end;
(* Override the default printer so they're abstract. *)
local
fun prettyCPUTimer _ _ (_: Timer.cpu_timer) = PolyML.PrettyString "?"
and prettyRealTimer _ _ (_: Timer.real_timer) = PolyML.PrettyString "?"
in
val () = PolyML.addPrettyPrinter prettyCPUTimer
and () = PolyML.addPrettyPrinter prettyRealTimer
end;
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