Windowsでの時刻同期についての質問

[Yuuichi Akiyama]

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[Hiroki Kashiwazaki]

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At Fri, 8 Aug 2003 00:53:16 +0900,

Post by Yuuichi Akiyama
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http://www.miz.nao.ac.jp/staffs/hisa/00TEsympo.html

[IIJIMA Hiromitsu]

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Post by Hiroki Kashiwazaki
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Post by Hiroki Kashiwazaki

Post by Yuuichi Akiyama
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IIJIMA Hiromitsu, aka Delmonta mailto:***@ht.sakura.ne.jp

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[T. Sugita]

Post by IIJIMA Hiromitsu
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--
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sugi-***@bk.iij4u.or.jp

[Yuuichi Akiyama]

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Post by IIJIMA Hiromitsu
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Post by Hiroki Kashiwazaki
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Post by Hiroki Kashiwazaki

Post by Yuuichi Akiyama
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[NAKAMURA Kazushi]

Post by IIJIMA Hiromitsu

Post by Hiroki Kashiwazaki

Post by Yuuichi Akiyama
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Linux,*BSD$B$@$HC/$G$b(BOS$B$N(Bkernel$B$=$N$b$N$N%=!<%9%3!<%I$r8+$F!"!J?7$7$$(B
$B9b@:EY$J%?%$%^(BIC$B$KBP1~$7$?!K2~NI$9$k$3$H$,2DG=$G$9!#$7$+$7!"(BWindows
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$B$7$^$$$^$9!#(B
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(1/100s)$B$G$9!#(BNTPD$B$r0\?"$7$h$&$H$7$?$"$k?M$,65$($F$/$l$?$N$G$9$,!"(B
$B!V%G!<%b%s$,$$$/$i4hD%$C$F$b!"%G!<%b%s<+?H$rF0$+$7$F$/$l$k%?%9%/%9%$%C%A(B
$B$N@:EY$,(B1/100s$B$@!#!W$H$N$3$H$G$9!#(B
*BSD$B$N>l9g!";~9o9g$o$;$O%G!<%b%s<+?H$G$J$/!"%G!<%b%s$,(Bkernel$B$K0MMj$7$F!"(B
SYNC_PPS$BIU$-$G(Bkernel$B$,:n$i$l$F$$$k>l9g$O!"%7%j%"%k$J$j!"%Q%i%l%k$J$j!"(B
LAN$B$J$j$+$iAw$i$l$FMh$k(BPPS(Pulse Per Second)$BEE5$?.9f$N3d9~$_$rBT$A9=$($F(B

Post by IIJIMA Hiromitsu
$B$A$J$_$K(B Windows $B$G$b!"(BQueryPerformanceCounter() $B$r;H$($P!"<j85$N4D6-$G$O(B
1$B&L(Bs $B0J2<$NB,Dj$,2DG=$G$9!#FbItE*$K$O(B Pentium $B0J9_$N(B CPU $B$N(B RDTSC $BL?Na$r(B
$B;H$C$F$$$k$N$G$7$g$&!#(B

RDTSC$BL?Na$J$i$P!"(BOS$B$K4X78L5$$$N$G(BLinux,*BSD$B$G$b;H$($^$9!#LdBj$O!"(B
$B$"$k;v>](B
QueryPerformanceCounter()
$B$NFs<T!J=g=x$O$I$A$i$G$b9=$$$^$;$s!K$N4V$K%?%9%/%9%$%C%A$,F~$C$?$+(B
$B$I$&$+!"%f!<%6%i%s%I%W%m%;%9$+$i$OCN$jF@$^$;$s!#(BLinux,*BSD$B$J$i$P!"(Bkernel
$B$r0lHL%f!<%6$K!vA4$F!v8x3+$7$F$$$k$N$G!"0lHL%f!<%6$,(Bkernel$B$N$=$N;v>]$r(B
$B07$C$F$$$kItJ,$K<j$r2C$($k$3$H$,2DG=$G$9!#(B

$BM>CL(B:$B<j$C<h$jAa$$$N$O!"(BLinux,*BSD$B$N>l9g!"%?%9%/%9%$%C%A$N@:EY$r(BHZ=100
$B$+$i(BHZ=5000$B$/$i$$$K>e$2$F$d$k$H$$$&<j$,M-$j$^$9!#%m%\%C%H20$N8eGZ$N(B
$BOC$G$O!"(BHZ=5000$B$/$i$$$J$i(BPentium2$B$G$b%m%\%C%H$r@)8f$7$J$,$i!"%M%C%H(B
$B%5!<%U%#%s$7$?$j!"%a!<%k$d%K%e!<%9(B(:-)$B$NFI=q$-$r%9%H%l%9L5$/=PMh$?(B
$B$=$&$G$9!#!D$b$H$$!"%m%\%C%H$r@)8f2DG=$J@:EY$,F@$i$l$?$=$&$G$9!#(B

[IIJIMA Hiromitsu]

$B$$$$$8$^$G$9!#(B

Post by NAKAMURA Kazushi
$B;}$C$F$$$^$;$s$G$7$?!#$=$l$G(BMS-DOS$B$O!"5/F0;~$K8=;~9o!&F|IU$rI,$:F~NO$9$k(B
$B;EMM$K$J$j$^$7$?!#$=$l$KBP$7!"(BNEC-PC($B$3$s$J=qJ}$G%(%($s$+(B?)$B$NJ}$O!"(B
$B$^$7$?$,!"(BPC-9801VM21/VX21$B$+$i?7$7$$(BIC$B$K$J$j$^$7$?!#(B

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$B$G$7$?!#!JDL$C$F$$$?3X9;$K(B PC-9801VM $B$,$"$j$^$7$?$1$I!"$=$N8e$m$***@53N$J7?(B
$BHV$O3P$($F$$$J$$!D!K(B

Post by NAKAMURA Kazushi
(1/100s)$B$G$9!#(BNTPD$B$r0\?"$7$h$&$H$7$?$"$k?M$,65$($F$/$l$?$N$G$9$,!"(B
$B!V%G!<%b%s$,$$$/$i4hD%$C$F$b!"%G!<%b%s<+?H$rF0$+$7$F$/$l$k%?%9%/%9%$%C%A(B

$B$$$d!"7P2a;~4V$NB,Dj$O(B timeGetTime() $B$r;H$($P(B 1ms $B$G$G$-$^$9!#(B

Post by NAKAMURA Kazushi

Post by IIJIMA Hiromitsu
$B$A$J$_$K(B Windows $B$G$b!"(BQueryPerformanceCounter() $B$r;H$($P!"<j85$N4D6-$G$O(B
1$B&L(Bs $B0J2<$NB,Dj$,2DG=$G$9!#FbItE*$K$O(B Pentium $B0J9_$N(B CPU $B$N(B RDTSC $BL?Na$r(B
$B;H$C$F$$$k$N$G$7$g$&!#(B

RDTSC$BL?Na$J$i$P!"(BOS$B$K4X78L5$$$N$G(BLinux,*BSD$B$G$b;H$($^$9!#(B

$B$3$l!"%^%k%A%W%m%;%C%5$N>l9g$O$I$&$J$k$s$G$7$g$&$+!)(B
$B$D$^$j!"FCDj$N%9%l%C%I$,$"$k$H$-$O%W%m%;%C%5(B A $B$N>e$G!"JL$N$"$k$H$-$O%W%m(B
$B%;%C%5(B B $B$N>e$GF0$/$h$&$J$3$H$K$J$C$F$7$^$&$H!"(B2 $BBf$N%W%m%;%C%5$G(B RDTSC $B$N(B
$B%+%&%s%?$,F1$8CM$r<($7$F$O$$$J$$$N$G!"%f!<%6!<%i%s%I$G(B RDTSC $B$r<B9T$9$k$H(B
$B?t;z$,68$&$3$H$K$J$j$^$9!#(B

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$B$=$3$G(B RDTSC $B$r<B9T$9$k$3$H$K$J$j$^$9!#$=$N7k2L$rMxMQ$9$k%7%9%F%`%3!<%k$,(B
$B$J$$$H%"%&%H$G$9$h$M!D9,$$!"(BLinux $B$d(B *BSD $B$K$O$"$j$^$9$,!#(B

========================================================================
$BHSEh(B $***@8w(B / $B$G$k$b$s$?!&$$$$$8$^(B http://www.ht.sakura.ne.jp/~delmonta/
IIJIMA Hiromitsu, aka Delmonta mailto:***@ht.sakura.ne.jp

$B(!(!(!!***@kEA(B/ADVERTISEMENT$B![(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(B
fj.os.ms-windows.server2003 $B$^$?$O(B fj.os.ms-windows.server $B$N?***@_$N2DH](B
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$BEjI<4|8B$O(B 8/25($B7n(B)$B$G$9!#(B
$B(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(B

[NAKAMURA Kazushi]

Post by IIJIMA Hiromitsu
$B$$$d!"7P2a;~4V$NB,Dj$O(B timeGetTime() $B$r;H$($P(B 1ms $B$G$G$-$^$9!#(B

$B$=$l$O5U$G!"(BOS$BFbIt$N;~9o4IM}$O(B1ms$B$+$b$C$H:Y$+$$@:EY$G4IM}$7$F$$$k(B
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$B$K8B$i$:2?$i$+$N4X?t$r8F$\$&$H$7$F$b!"<B:]$K8F$V$^$G$N4V$K(B
$B0lHL%W%m%0%i%^$K$O$$$+$s$H$b$7Fq$$%?%9%/%9%$%C%A$,F~$C$F$7$^$&(B
$B$N$G!"7k6I(B10ms$BC10L$K$J$C$F$7$^$&$H$$$&OC!#Nc$(4X?t$NJV$9CM$,(B
1ms$BC10L$G$b!"<B:]$K%W%m%0%i%`$rF0$+$7$F2?EY$bB,Dj$r7+$jJV$7$F!"(B

Post by IIJIMA Hiromitsu
$B$3$l!"%^%k%A%W%m%;%C%5$N>l9g$O$I$&$J$k$s$G$7$g$&$+!)(B

$B$3$lLLGr$$OC$G$9$M!#$A$H$d$C$F$_$^$9$+!#(B

[Masamichi Takatsu]

$B9bDE(B@$B%I!<%,$G$9!#(B

$B5-;v(B <***@ns.kobe1995.net> $B$G(B
NAKAMURA Kazushi$B$5$s$O=q$-$^$7$?(B

Post by NAKAMURA Kazushi

Post by IIJIMA Hiromitsu
$B$$$d!"7P2a;~4V$NB,Dj$O(B timeGetTime() $B$r;H$($P(B 1ms $B$G$G$-$^$9!#(B

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$B$N$G!"7k6I(B10ms$BC10L$K$J$C$F$7$^$&$H$$$&OC!#Nc$(4X?t$NJV$9CM$,(B
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$B<B:]$K$d$C$F$_$k$H$o$+$j$^$9$1$I!"(BtimeGetTime $B$G$A$c$s$H(B1ms $B$N@:EY(B
$B=P$^$9$h!#0lJ}!"(BGetTickCount $B$O@:EY$,A4A3=P$^$;$s!#(BWindows $B$N;~9o@:EY(B
$B$,0-$$$H$$$&$N$O!"(BGetTickCount $B$r;X$***@MU$@$H;W$$$^$9!#(B


$B0J2<!"%F%9%H%W%m%0%i%`(B
---
#include <stdio.h>
#include <math.h>
#include <windows.h>

int main(int argc, char *argv[])
{
LARGE_INTEGER qpc1, qpc2, qpf;
int step = (argc > 1) ? atoi(argv[1]) : 25;
int count = (argc > 2) ? atoi(argv[2]) : 10;
int i, tgt2, gtc2;
int tgt1 = timeGetTime();
int gtc1 = GetTickCount();
QueryPerformanceFrequency(&qpf);
QueryPerformanceCounter(&qpc1);
printf("QueryPerformanceCounter: %.0fHz\n", (double)qpf.QuadPart);
for (i = 0; i <= count; i++) {
int tgt, gtc;
double qpc;
if (step > 10000) {
int j;
for (j = step; j> 0; j--) {
sqrt(j);
}
} else {
Sleep(step);
}
tgt2 = timeGetTime();
gtc2 = GetTickCount();
QueryPerformanceCounter(&qpc2);
tgt = tgt2 - tgt1;
gtc = gtc2 - gtc1;
qpc = (double)(qpc2.QuadPart - qpc1.QuadPart) / (double)qpf.QuadPart * 1000.0;
tgt1 = tgt2;
gtc1 = gtc2;
qpc1 = qpc2;
if (i > 0) {
printf("timeGetTime=%dms, GetTickCount=%dms, QueryPerformanceCounter=%.3fms\n", tgt, gtc, qpc);
}
}
return 0;
}
---

$B<B9T7k2L(B(Windows XP$B!"(BAthlonXP 1800+$B!"(BBorland C++ Builder 6 $B$G%3%s%Q%$%k(B)
---

Post by NAKAMURA Kazushi
test 25

QueryPerformanceCounter: 3579545Hz
timeGetTime=26ms, GetTickCount=16ms, QueryPerformanceCounter=25.400ms
timeGetTime=25ms, GetTickCount=31ms, QueryPerformanceCounter=25.393ms
timeGetTime=25ms, GetTickCount=31ms, QueryPerformanceCounter=25.388ms
timeGetTime=26ms, GetTickCount=16ms, QueryPerformanceCounter=25.384ms
timeGetTime=25ms, GetTickCount=31ms, QueryPerformanceCounter=25.426ms
timeGetTime=25ms, GetTickCount=31ms, QueryPerformanceCounter=25.358ms
timeGetTime=26ms, GetTickCount=16ms, QueryPerformanceCounter=25.390ms
timeGetTime=25ms, GetTickCount=31ms, QueryPerformanceCounter=25.392ms
timeGetTime=26ms, GetTickCount=16ms, QueryPerformanceCounter=25.390ms
timeGetTime=25ms, GetTickCount=31ms, QueryPerformanceCounter=25.392ms


($B%k!<%WFb$G$O(B 1ms Sleep $B$9$k(B)

Post by NAKAMURA Kazushi
test 1

QueryPerformanceCounter: 3579545Hz
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=1.952ms
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=1.954ms
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=1.953ms
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=1.953ms
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=1.954ms
timeGetTime=2ms, GetTickCount=15ms, QueryPerformanceCounter=1.953ms
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=1.960ms
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=1.960ms
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=2.008ms
timeGetTime=2ms, GetTickCount=0ms, QueryPerformanceCounter=1.885ms

Post by NAKAMURA Kazushi
test 1000000

QueryPerformanceCounter: 3579545Hz
timeGetTime=37ms, GetTickCount=47ms, QueryPerformanceCounter=37.028ms
timeGetTime=37ms, GetTickCount=31ms, QueryPerformanceCounter=37.271ms
timeGetTime=37ms, GetTickCount=32ms, QueryPerformanceCounter=36.994ms
timeGetTime=37ms, GetTickCount=46ms, QueryPerformanceCounter=36.985ms
timeGetTime=37ms, GetTickCount=32ms, QueryPerformanceCounter=37.060ms
timeGetTime=37ms, GetTickCount=31ms, QueryPerformanceCounter=37.020ms
timeGetTime=37ms, GetTickCount=47ms, QueryPerformanceCounter=37.051ms
timeGetTime=37ms, GetTickCount=31ms, QueryPerformanceCounter=36.970ms
timeGetTime=38ms, GetTickCount=47ms, QueryPerformanceCounter=36.922ms
timeGetTime=41ms, GetTickCount=31ms, QueryPerformanceCounter=41.106ms
---

PROJECT TEAM $B#D#o#G#A(B $***@5F;(B ***@doga.jp
***@nifty.ne.jp
PROJECT TEAM DoGA$B$N%[!<%`%Z!<%8(B $B"*(B http://doga.jp/
8$B7n(B28$BF|(B($BLZ(B) $B:#F|$N%^!<%U%#!<$NK!B'(B [$B8&5f0w$NK!B'(B]
$B2?$r<B83$7$F$$$k$+$o$+$i$J$$$H$-$O!"<j:]$h$/<B9T$;$h!#(B