Gpc June 2000

gpc@gnu.de

21 participants
52 discussions

06 Jun '00

Hi Text version of old faq was released without copyright notice. Think it was because texi wants 2 copies of copyright - one for texinfo and the other for TeX. So my question is - how should the copyright notice read for the new faq? Russ <russwhit(a)mind.net>

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RE: URGENT: Pascal Clock -
by Wren Lee 05 Jun '00

05 Jun '00

I have this routine that will extract the processor time on a Linux based PC. It's written in C but I'm sure it could be converted, or at least linked in. extern __inline__ unsigned long long int rdtsc() { unsigned long long int x; __asm__ volatile (".byte 0x0f, 0x31" : "=A" (x)); return x; } This routine will return the number of processor cycles since system boot, an in order to make any sense of it you need to know your system CPU clock speed. Regards, Lee. > -----Original Message----- > From: Raymond Wang [SMTP:rayw@wireless.stanford.edu] > Sent: 03 June 2000 11:23 > To: gpc(a)gnu.de > Subject: URGENT: Pascal Clock > > Hi, > > When I compile my pascal code with GNU Pascal's compiler, I get > undeclared > identifier `Clock' when I reference it in my code: > > e.g. y := clock/1000-y1 > > I thought Clock is a predefined global function. What should I do in > order > for the compiler to recognize the clock command? > > Thanks! > Ray > - - - - - - - - - - - - - > Raymond Wang > Department of Electrical Engineering > Stanford University > > www.stanford.edu/~rayw -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.

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Re: unsubscribe
by Clyde Meli 04 Jun '00

04 Jun '00

> Clyde Meli wrote: > > > > The hut.fi came from the reply header, so perhaps it needs to be > > updated. > > Huh? There is no reply header unless you set one. Sorry :) My unix mailer replied to the from header then. > > (Before anyone asks: This is intentionally so. > See: http://www.unicom.com/pw/reply-to-harmful.html) > > > You are right about the fact that it would have flagged/ > > rejected these emails also. IMHO it's worth it. > > Okay. Any objections? > > Peter > Let me suggest an alternative: adding something to the subject line which would identify the email as from the gpc list. We subscribers would know that the unsubscribe request is for the gpc list for example since the subject would be: *gpc* unsubscribe (or something similar). Regards, Clyde

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Re: unsubscribe
by Clyde Meli 04 Jun '00

04 Jun '00

> Clyde Meli wrote: > > Sorry, can't the gpc majordomo automatically flag unsubscribe requests, > > rather than send them to everyone on the list? > > It could do so but then it would also have sorted out these two > emails which contain "unsubscribe" somewhere at the beginning of > the body. > > Any votes? > > Peter > > PS: It's <gpc(a)gnu.de> now. > <gpc(a)hut.fi> still works but should not be used any longer. The hut.fi came from the reply header, so perhaps it needs to be updated. You are right about the fact that it would have flagged/ rejected these emails also. IMHO it's worth it. Regards, Clyde

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Re: unsubscribe
by Peter Gerwinski 04 Jun '00

04 Jun '00

Clyde Meli wrote: > > The hut.fi came from the reply header, so perhaps it needs to be > updated. Huh? There is no reply header unless you set one. (Before anyone asks: This is intentionally so. See: http://www.unicom.com/pw/reply-to-harmful.html) > You are right about the fact that it would have flagged/ > rejected these emails also. IMHO it's worth it. Okay. Any objections? Peter -- http://home.pages.de/~Peter.Gerwinski/ - G-N-U GmbH: http://www.g-n-u.de Maintainer GNU Pascal - http://home.pages.de/~GNU-Pascal/ - gpc-19990118 GnuPG key fingerprint: 9E7C 0FC4 8A62 5536 1730 A932 9834 65DB 2143 9422 keys: ftp://ftp.gerwinski.de/pub/keys/ - AntiSpam: http://spam.abuse.net

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Re: unsubscribe
by Clyde Meli 04 Jun '00

04 Jun '00

> unsubscribe > Sorry, can't the gpc majordomo automatically flag unsubscribe requests, rather than send them to everyone on the list? Just a minor suggestion... Regards, Clyde

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Re: URGENT: Pascal Clock
by Frank Heckenbach 04 Jun '00

04 Jun '00

Raymond Wang wrote: > I see what the problem is: I'm using GNU Pascal as opposed to DEC VAX > Pascal (where clock is a global function defined below). > > Does anyone know a way to mimic this "clock" in GNU Pascal? (I apologize > for my lack of Pascal knowledge!) No problem (it's nothing to do with Pascal in general, anyway -- as Peter noted, the only predefined routines to deal with time in Pascal are GetTimeStamp etc., but they measure real time, not CPU time). As I said in my last mail, if you have a not too old GPC release, you can use GetCPUTime. (In contrast to VAX Pascal, the result is not "most likely" in 10ms intervals, but definitely in seconds and microseconds. :-) So, if you want a "most likely";-) VAX Pascal compatible `Clock' routine, you can use the following code. (I use `LongInt' for the return value just in case -- `Integer' would be good for 2^31/100/86400 ~ 249 days.) The demo program shows that really CPU time is measured, i.e., `Sleep' doesn't take up time, but the loop does. program Foo; uses GPC; { Compatible to VAX Pascal. Result is in 10ms intervals. } function Clock : LongInt; var Second, MicroSecond : Integer; begin Second := GetCPUTime (MicroSecond); Clock := 100 * LongInt (Second) + MicroSecond div 10000 end; var i : Integer; begin Writeln (Clock); Sleep (1); Writeln (Clock); for i := 1 to 100000000 do; Writeln (Clock); end. Frank -- Frank Heckenbach, frank(a)g-n-u.de, http://fjf.gnu.de/ GPC To-Do list, latest features, fixed bugs: http://agnes.dida.physik.uni-essen.de/~gnu-pascal/todo.html

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Re: URGENT: Pascal Clock
by Raymond Wang 03 Jun '00

03 Jun '00

I see what the problem is: I'm using GNU Pascal as opposed to DEC VAX Pascal (where clock is a global function defined below). Does anyone know a way to mimic this "clock" in GNU Pascal? (I apologize for my lack of Pascal knowledge!) e.g. y := clock/1000-y1 Source:http://www.openvms.digital.com/wizard/group3/335.HTML Ask the Wizard Questions PASCAL Language: PASCAL CLOCK The Question is: What is the granularity of the CLOCK command in VAX PASCAL, also, what units does it measure? The Answer is: According to the DEC Pascal Language Reference Manual: " 8.21 CLOCK Function The CLOCK function returns an integer value indicating the amount of central processor time (in milliseconds) used by the current process. This function does not have a parame- ter list. The result of CLOCK includes the amount of central processor time allocated to all previously executed images." That being the case, the value is most likely taken from the system clock which is incremented at 10ms intervals - hence the granularity will be 10ms. A simple program seems to support this: PROGRAM CheckClock(OUTPUT); VAR LastTime,NextTime : INTEGER; BEGIN LastTime:=CLOCK; REPEAT NextTime:=CLOCK; UNTIL LastTime <> NextTime; WriteLn('LastTime = ',LastTime,' NextTime = ',NextTime); END. $ run checkclock LastTime = 3495890 NextTime = 3495900 Note however that the granularity may vary in future as OpenVMS is capable of expressing times to an accuracy of 100ns. - - - - - - - - - - - - - Raymond Wang Department of Electrical Engineering Stanford University www.stanford.edu/~rayw

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Re: URGENT: Pascal Clock
by Frank Heckenbach 03 Jun '00

03 Jun '00

Peter Gerwinski wrote: > Hi, Raymond Wang, > > you wrote: > > When I compile my pascal code with GNU Pascal's compiler, I get undeclared > > identifier `Clock' when I reference it in my code: > > > > e.g. y := clock/1000-y1 > > > > I thought Clock is a predefined global function. > > It is not. > > > What should I do in order > > for the compiler to recognize the clock command? > > If `Clock' stands for what the name suggests, you can write your > own one using the `Date' and `Time' routines. Please search the > documentation for these words and `GetTimeStamp'. These routines return real time. If you want to get processor time (like clock() in C), try GetCPUTime instead (only available in recent GPC versions). Frank -- Frank Heckenbach, frank(a)g-n-u.de, http://fjf.gnu.de/ GPC To-Do list, latest features, fixed bugs: http://agnes.dida.physik.uni-essen.de/~gnu-pascal/todo.html

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URGENT: Pascal Clock
by Raymond Wang 03 Jun '00

03 Jun '00

Hi, When I compile my pascal code with GNU Pascal's compiler, I get undeclared identifier `Clock' when I reference it in my code: e.g. y := clock/1000-y1 I thought Clock is a predefined global function. What should I do in order for the compiler to recognize the clock command? Thanks! Ray - - - - - - - - - - - - - Raymond Wang Department of Electrical Engineering Stanford University www.stanford.edu/~rayw

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Gpc June 2000