Is there a log framwork for fortran?
in [Fortran]
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From: wanneng on 3 Mar 2010 21:21 I want to find a log framwork for fortran which like the log4j.Is there anybody know something?
From: Richard Maine on 3 Mar 2010 22:38 wanneng <yangguosdxl(a)gmail.com> wrote: > I want to find a log framwork for fortran which like the log4j.Is there > anybody know something? I've never heard of log4j, though google points me to it pretty quickly and gives me an idea what you are talking about. I don't know of any special "framework" for it, but maybe that's just because it is easy enough to do at least the basics without special help. It is quite common for people to put debugging output in their code and have that debugging output be controlled by a variable that can be set at run time, either by a configuration file or other means. As far as I can see from a (very) quick glance, that's what log4j does. The description of log4j alludes to significant performance penalties from java log statements, even when logging is turned off. I don't know enough about java to evaluate that. (Heck, I don't even know whether there is a special log statement or they are talking about something more general). But it certainly is not the case that you would even be able to measure any performance difference from even a lot of such conditional outputs in Fortran. Unless I am misunderstanding what log4j is about (which is possible, as my skim was pretty quick), just do it "manually" in a straightforward way. No special package should be needed in Fortran. As mentioned, people do this quite a lot. I'm sure I recall some regulars here saying that they made a practice of it. Perhaps they might have some particular hints, but I wasn't thinking there was anything special enough that any hints would help. -- Richard Maine | Good judgment comes from experience; email: last name at domain . net | experience comes from bad judgment. domain: summertriangle | -- Mark Twain
From: Arjen Markus on 4 Mar 2010 03:12 On 4 mrt, 04:38, nos...(a)see.signature (Richard Maine) wrote: > wanneng <yangguos...(a)gmail.com> wrote: > > I want to find a log framwork for fortran which like the log4j.Is there > > anybody know something? > > I've never heard of log4j, though google points me to it pretty quickly > and gives me an idea what you are talking about. I don't know of any > special "framework" for it, but maybe that's just because it is easy > enough to do at least the basics without special help. > > It is quite common for people to put debugging output in their code and > have that debugging output be controlled by a variable that can be set > at run time, either by a configuration file or other means. As far as I > can see from a (very) quick glance, that's what log4j does. The > description of log4j alludes to significant performance penalties from > java log statements, even when logging is turned off. I don't know > enough about java to evaluate that. (Heck, I don't even know whether > there is a special log statement or they are talking about something > more general). But it certainly is not the case that you would even be > able to measure any performance difference from even a lot of such > conditional outputs in Fortran. > > Unless I am misunderstanding what log4j is about (which is possible, as > my skim was pretty quick), just do it "manually" in a straightforward > way. No special package should be needed in Fortran. As mentioned, > people do this quite a lot. I'm sure I recall some regulars here saying > that they made a practice of it. Perhaps they might have some particular > hints, but I wasn't thinking there was anything special enough that any > hints would help. > > -- > Richard Maine | Good judgment comes from experience; > email: last name at domain . net | experience comes from bad judgment. > domain: summertriangle | -- Mark Twain My Flibs project (http://flibs.sf.net) contains a module m_logger (by Michael Baudin) to do that sort of things. You may have to use the CVS repository directly - I am not sure I have already included it in a tar-file. It is by no means as extensive as log4j, but it does a nice job. Regards, Arjen set of subroutines in Fortran is taking
From: George White on 4 Mar 2010 12:35 On Thu, 4 Mar 2010, wanneng wrote: > I want to find a log framwork for fortran which like the log4j.Is there > anybody know something? The slatec xerror package has some overlap. A nice feature of xerror for numerical calculations is the ability to produce a table at the end of a job with a count of each type of (non-fatal) error that ocurred during a run. -- George White <aa056(a)chebucto.ns.ca> <gnw3(a)acm.org> 189 Parklea Dr., Head of St. Margarets Bay, Nova Scotia B3Z 2G6
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