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(*
Title: Poly/ML Statistics parser.
Author: David Matthews
Copyright David Matthews 2013, 2015-17
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 2.1 as published by the Free Software Foundation.
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
*)
(*
This is an interface to the statistics provided by the run-time system.
For machine-independence and backwards compatibility they are encoded
using ASN1 binary encodeing
*)
local
open Asn1
datatype statistic =
UnknownStat
| CounterStat of { identifier: int, name: string, count: int }
| SizeStat of { identifier: int, name: string, size: int }
| TimeStat of { identifier: int, name: string, time: Time.time }
| UserStat of { identifier: int, name: string, count: int }
datatype component =
CounterValue of int
| ByteCount of int
| Time of Time.time
| UnknownComponent
val emptySlice = Word8VectorSlice.full(Word8Vector.fromList [])
fun convStats(v: Word8Vector.vector) =
let
fun parseStatistic p =
case decodeItem p of
SOME {tag = Application(0x1, Constructed), data, remainder} =>
(
case parseComponents({identifier=0, name="", value=UnknownComponent}, data) of
{identifier, name, value=CounterValue v} =>
(CounterStat{identifier=identifier, name=name, count=v}, remainder)
| _ => (UnknownStat, remainder)
)
| SOME {tag = Application(0x2, Constructed), data, remainder} =>
(
case parseComponents({identifier=0, name="", value=UnknownComponent}, data) of
{identifier, name, value=ByteCount s} =>
(SizeStat{identifier=identifier, name=name, size=s}, remainder)
| _ => (UnknownStat, remainder)
)
| SOME {tag = Application(0x3, Constructed), data, remainder} =>
(
case parseComponents({identifier=0, name="", value=UnknownComponent}, data) of
{identifier, name, value=Time t} =>
(TimeStat{identifier=identifier, name=name, time=t}, remainder)
| _ => (UnknownStat, remainder)
)
| SOME {tag = Application(0xb, Constructed), data, remainder} =>
(
case parseComponents({identifier=0, name="", value=UnknownComponent}, data) of
{identifier, name, value=CounterValue c} =>
(UserStat{identifier=identifier, name=name, count=c}, remainder)
| _ => (UnknownStat, remainder)
)
| SOME {remainder, ...} => (UnknownStat, remainder)
| NONE => (UnknownStat, emptySlice)
and parseComponents(result as {identifier, name, value }, p) =
if Word8VectorSlice.length p = 0
then result
else
(
case decodeItem p of
SOME {tag = Application(0x4, Primitive), data, remainder} =>
parseComponents({identifier=decodeInt data, name=name, value=value}, remainder)
| SOME {tag = Application(0x5, Primitive), data, remainder} =>
parseComponents({name=decodeString data, identifier=identifier, value=value}, remainder)
| SOME {tag = Application(0x6, Primitive), data, remainder} =>
parseComponents({identifier=identifier, name=name, value=CounterValue(decodeInt data)}, remainder)
| SOME {tag = Application(0x7, Primitive), data, remainder} =>
parseComponents({identifier=identifier, name=name, value=ByteCount(decodeInt data)}, remainder)
| SOME {tag = Application(0x8, Constructed), data, remainder} =>
let
fun parseTime (t, p) =
if Word8VectorSlice.length p = 0
then t
else
(
case decodeItem p of
SOME {tag = Application(0x9, Primitive), data, remainder} =>
parseTime(t + Time.fromSeconds(LargeInt.fromInt(decodeInt data)), remainder)
| SOME {tag = Application(0xa, Primitive), data, remainder} =>
parseTime(t + Time.fromMicroseconds(LargeInt.fromInt(decodeInt data)), remainder)
| SOME {remainder, ...} => parseTime(t, remainder) (* Unknown *)
| NONE => t
)
in
parseComponents({identifier=identifier, name=name,
value=Time(parseTime(Time.zeroTime, data))}, remainder)
end
| SOME {remainder, ...} => parseComponents(result, remainder)
| NONE => result
)
fun parseStatistics l =
if Word8VectorSlice.length l = 0
then []
else
let
val (item, rest) = parseStatistic l
val items = parseStatistics rest
in
item :: items
end
val stats =
case decodeItem (Word8VectorSlice.full v) of
SOME {tag = Application(0x0, Constructed), data, ...} => parseStatistics data
| _ => raise Fail "Statistics not available"
fun extractCounter(n, l) =
case List.find (fn CounterStat{identifier, ...} => identifier = n | _ => false) l of
SOME(CounterStat{ count, ...}) => count
| _ => 0
and extractSize(n, l) =
case List.find (fn SizeStat{identifier, ...} => identifier = n | _ => false) l of
SOME(SizeStat{ size, ...}) => size
| _ => 0
and extractTime(n, l) =
case List.find (fn TimeStat{identifier, ...} => identifier = n | _ => false) l of
SOME(TimeStat{ time, ...}) => time
| _ => Time.zeroTime
and extractUser(n, l) =
case List.find (fn UserStat{identifier, ...} => identifier = n | _ => false) l of
SOME(UserStat{ count, ...}) => count
| _ => 0
in
{
threadsTotal = extractCounter(1, stats),
threadsInML = extractCounter(2, stats),
threadsWaitIO = extractCounter(3, stats),
threadsWaitMutex = extractCounter(4, stats),
threadsWaitCondVar = extractCounter(5, stats),
threadsWaitSignal = extractCounter(6, stats),
gcFullGCs = extractCounter(7, stats),
gcPartialGCs = extractCounter(8, stats),
sizeHeap = extractSize(9, stats),
sizeHeapFreeLastGC = extractSize(10, stats),
sizeHeapFreeLastFullGC = extractSize(11, stats),
sizeAllocation = extractSize(12, stats),
sizeAllocationFree = extractSize(13, stats),
timeNonGCUser = extractTime(14, stats),
timeNonGCSystem = extractTime(15, stats),
timeGCUser = extractTime(16, stats),
timeGCSystem = extractTime(17, stats),
userCounters = Vector.tabulate(8, fn n => extractUser(n+18, stats))
}
end
open RunCall
local
val polySpecificGeneralCall = RunCall.rtsCallFull2 "PolySpecificGeneral"
in
fun polySpecificGeneral(code: int, arg:'a):'b = RunCall.unsafeCast(polySpecificGeneralCall(RunCall.unsafeCast(code, arg)))
end
in
structure PolyML =
struct
open PolyML
structure Statistics =
struct
fun getLocalStats() =
convStats(polySpecificGeneral (29, ()))
and getRemoteStats(pid: int) =
convStats(polySpecificGeneral (30, pid))
and numUserCounters(): int = polySpecificGeneral (27, ())
and setUserCounter(which: int, value: int): unit = polySpecificGeneral (28, (which, value))
end
end
end;
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