ok so i have written a program in C where I am dealing with huge
data(millions and lots of iterations involved) and for some reason the
screen tends to freeze and I get no output every time I execute it.
However, I have tried to reduce the amount of data and the program
runs fine.
What could possibly be done to resolve this ?
16  2044 
I forgot to mention this happened while I was trying to print data.
I have seen it can't work for extremely huge data.
pereges wrote:
>
ok so i have written a program in C where I am dealing with huge
data(millions and lots of iterations involved) and for some reason the
screen tends to freeze and I get no output every time I execute it.
However, I have tried to reduce the amount of data and the program
runs fine.
What could possibly be done to resolve this ?
There's a bug on line 42.
--
+-------------------------+--------------------+-----------------------+
| Kenneth J. Brody | www.hvcomputer.com | #include |
| kenbrody/at\spamcop.net | www.fptech.com | <std_disclaimer .h|
+-------------------------+--------------------+-----------------------+
Don't e-mail me at: <mailto:Th***** ********@gmail. com>
pereges wrote:
<program "freezing" on "huge data" and millions of iterations>
I forgot to mention this happened while I was trying to print data.
Print where? To a disk file? To a flash drive? To a screen? Some other
device? To memory? What's the code for the print function[s]? What are
the data structures involved? Did you try compiler optimisations? Did
you try implementation specific I/O routines (which are sometimes
faster than standard C ones)? Did you profile the program?
I have seen it can't work for extremely huge data.
Can't work or works too slowly for your taste?
Unless you show us your current code and where exactly it's performance
is not meeting your expectations, there's absolutely nothing that can
be said other than the generic advice to buy faster storage devices and
faster, more powerful hardware.
pereges wrote:
>
ok so i have written a program in C where I am dealing with huge
data (millions and lots of iterations involved) and for some
reason the screen tends to freeze and I get no output every time
I execute it. However, I have tried to reduce the amount of data
and the program runs fine.
What could possibly be done to resolve this ?
On the information supplied, I suspect that simply reducing the
amount of data will fix the problem. I am unable to estimate how
much it should be reduced.
--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <http://cbfalconer.home .att.net>
Try the download section.
** Posted from http://www.teranews.com **
CBFalconer said:
pereges wrote:
>>
ok so i have written a program in C where I am dealing with huge
data (millions and lots of iterations involved) and for some
reason the screen tends to freeze and I get no output every time
I execute it. However, I have tried to reduce the amount of data
and the program runs fine.
What could possibly be done to resolve this ?
On the information supplied, I suspect that simply reducing the
amount of data will fix the problem. I am unable to estimate how
much it should be reduced.
In a similar vein, it was reported a few years ago that a computer program,
on being told that 90% of accidents in the home involved either the top
stair or the bottom stair and being asked what to do to reduce accidents,
suggested removing the top and bottom stairs.
C programs regularly have to deal with very large amounts of data, and many
of them do so with admirable efficiency. The large amount of data, then,
is *not* the cause of the problem. Rather, it is when large amounts of
data are being processed that the problem manifests itself. Therefore,
reducing the amount of data will not only *not* fix the problem, but will
actually hide it, making it *harder* to fix.
The proper solution is to find and fix the bug that is causing the problem.
The way to do /that/ is to reduce, not the amount of *data*, but the
amount of *code* - until the OP has the smallest compilable program that
reproduces the problem. It is often the case that, in preparing such a
program, the author of the code will find the problem. But if not, at
least he or she now has a minimal program that can be presented for
analysis by C experts, such as those who regularly haunt the corridors of
comp.lang.c. I commend this strategy to the OP.
--
Richard Heathfield <http://www.cpax.org.uk >
Email: -http://www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999
On Apr 23, 5:00*pm, Richard Heathfield <r...@see.sig.i nvalidwrote:
CBFalconer said:
pereges wrote:
ok so i have written a program in C where I am dealing with huge
data (millions and lots of iterations involved) and for some
reason the screen tends to freeze and I get no output every time
I execute it. However, *I have tried to reduce the amount of data
and the program runs fine.
What could possibly be done to resolve this ?
On the information supplied, I suspect that simply reducing the
amount of data will fix the problem. *I am unable to estimate how
much it should be reduced.
In a similar vein, it was reported a few years ago that a computer program,
on being told that 90% of accidents in the home involved either the top
stair or the bottom stair and being asked what to do to reduce accidents,
suggested removing the top and bottom stairs.
C programs regularly have to deal with very large amounts of data, and many
of them do so with admirable efficiency. The large amount of data, then,
is *not* the cause of the problem. Rather, it is when large amounts of
data are being processed that the problem manifests itself. Therefore,
reducing the amount of data will not only *not* fix the problem, but will
actually hide it, making it *harder* to fix.
The proper solution is to find and fix the bug that is causing the problem..
The way to do /that/ is to reduce, not the amount of *data*, but the
amount of *code* - until the OP has the smallest compilable program that
reproduces the problem. It is often the case that, in preparing such a
program, the author of the code will find the problem. But if not, at
least he or she now has a minimal program that can be presented for
analysis by C experts, such as those who regularly haunt the corridors of
comp.lang.c. I commend this strategy to the OP.
I don't think we can give good advice until the OP actually states
what his exact problem is.
This:
ok so i have written a program in C where I am dealing with huge
data (millions and lots of iterations involved) and for some
reason the screen tends to freeze and I get no output every time
I execute it. However, I have tried to reduce the amount of data
and the program runs fine.
Does not really tell us anything.
Millions of records? In what format? What operations are performed
against the data? What is the actual underlying problem that is being
solved?
Probably, there is a good, inexpensive and compact solution and likely
there are prebuilt tools that will already accomplish the job (or get
most of the way there).
"Big data" that "seems to freeze" doesn't mean anything.
On Apr 23, 10:25 pm, santosh <santosh....@gm ail.comwrote:
pereges wrote:
<program "freezing" on "huge data" and millions of iterations>
I forgot to mention this happened while I was trying to print data.
Print where? To a disk file? To a flash drive? To a screen? Some other
device? To memory? What's the code for the print function[s]? What are
the data structures involved? Did you try compiler optimisations? Did
you try implementation specific I/O routines (which are sometimes
faster than standard C ones)? Did you profile the program?
I have seen it can't work for extremely huge data.
Can't work or works too slowly for your taste?
Unless you show us your current code and where exactly it's performance
is not meeting your expectations, there's absolutely nothing that can
be said other than the generic advice to buy faster storage devices and
faster, more powerful hardware.
There are ~ 500 lines in the code. If you don't mind reading it I will
definetely post it.
I didn't post it for a reason.
On Thu, 24 Apr 2008 00:00:04 +0000, Richard Heathfield wrote:
In a similar vein, it was reported a few years ago that a computer
program, on being told that 90% of accidents in the home involved either
the top stair or the bottom stair and being asked what to do to reduce
accidents, suggested removing the top and bottom stairs.
C programs regularly have to deal with very large amounts of data, and
many of them do so with admirable efficiency. The large amount of data,
then, is *not* the cause of the problem. Rather, it is when large
amounts of data are being processed that the problem manifests itself.
Therefore, reducing the amount of data will not only *not* fix the
problem, but will actually hide it, making it *harder* to fix.
The proper solution is to find and fix the bug that is causing the
problem. The way to do /that/ is to reduce, not the amount of *data*,
but the amount of *code* - until the OP has the smallest compilable
program that reproduces the problem. It is often the case that, in
preparing such a program, the author of the code will find the problem.
But if not, at least he or she now has a minimal program that can be
presented for analysis by C experts, such as those who regularly haunt
the corridors of comp.lang.c. I commend this strategy to the OP.
OMG, I am sure this is one of the best advices of
doing Software-Construction.
-- http://lispmachine.wordpress.com/
my email ID is at the above address
On Wed, 23 Apr 2008 20:16:25 -0700, pereges wrote:
There are ~ 500 lines in the code. If you don't mind reading it I will
definetely post it.
I didn't post it for a reason.
I know that. As Richard Heathfield said find and post the smallest
compilable unit.
-- http://lispmachine.wordpress.com/
my email ID is at the above address This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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