[Perfparse-devel-int] Re: [Perfparse-users] perfparsed & CPU usage

[Tim W. <tim...@gm...>]

Yves,

- tim...@gm... is fine :)
- I noticed a new entry in the config when doing show_config:
Storage_Modules_Load = "", but no docs about this. This is probably
why nothing is written to the db. What should be in there?
- another thing: the cgi's won't compile because GD_LIBS= is empty in
the makefile (was GD_LIBS = -lgd in 103.2)

regards,
Tim

On Mon, 29 Nov 2004 15:43:55 +0100 (CET), Yves <yme...@pe...> wrote:
> 
> > Yves,
> > How much do I get if I told you I've found the solution?
> 
> 31 more characters in the ChangeLog, and some public thanks in the announce of
> pp-0.104.2 that may be released this week :)
> 
> > :)
> 
> :)
> 
> About the 31 characters, I suggest "Tim Wuyts <tim...@gm...>" :)
> Do you agree ?
> 
> > OK, I admit, it seems odd, but I've encountered this next comment in a
> > piece of Perl (yes, Perl) code:
> > # Open the fifo read/write, not just read. This is necessary because
> > # of the POSIX rules about using select() on named pipes when no writers
> > # are present. This is a very key step that is hard to find documentation
> > # about.
> >
> > (note the last sentence!)
> 
> I confirm...
> My searchs showed me that there was an additionnal bug : before the 1st write to the
> fifo, perfparse would have hanged on that open(fifo, O_RDONLY).
> Using O_RDONLY |O_NONBLOCK fixes that bug, but select() still immediately returns.
> Using O_RDWR works and O_NONBLOCK is not necessary for open() :)
> 
> 
> 
> 
> > So I tried exactly that:
> > change
> > log_fd[i]->fd = open(filename+1, O_RDONLY);
> > to
> > log_fd[i]->fd = open(filename+1, O_RDWR);
> >
> > and that's it ! Works in 103.2 and 104.1
> > (perfparsed 104.1 compiles, but doesn't write anyhting to the db...
> > :(, but that's another problem I guess. More tomorrow... )
> 
> For the database, the problem is maybe dlopen() not working. A possible reason is
> libpp_storage_mysql not being in a PATH that ld.so knows. On GNU/Linux, edit
> /etc/ld.so.conf then run ldconfig. On other systems (including GNU/Linux if you don't
> want to edit /etc/ld.so.conf) change your $LD_LIBRARY_PATH env var.
> 
> Could you tell me any error message that you have ? I'd like to find where I should stop
> the execution of perfparse when there is a problem with the db.
> 
> > happy coding,
> 
> Thanks :)
> And you, happy debugging :)
> 
> Yvse
> 
> 
> 
> > Tim
> >
> > On Fri, 26 Nov 2004 17:08:42 +0100 (CET), Yves <yme...@pe...> wrote:
> >>
> >> > Yves,
> >> >
> >> > Recompiling with the log_source_nonblock(i)  line commented out does
> >> > not change anything. The CPU still sky-rockets, and the 4 lines still
> >> > show up (a gazillion times) in strace output.
> >>
> >> So I just suggest that you upgrade to 0.104.1 this week-end, when Ben releases it, and
> >> I
> >> will try to find out why there is always something to read on the pipe for select().
> >>
> >> The only thing I can suggest you now, if you really want a hacked solution, is to put
> >> this in log_reader() :
> >>
> >> while(10 == (r=read(...))) {
> >>   ...
> >> }
> >> if((r>0) && (r<10)) {
> >>    ...
> >> } else if(r == 0) {
> >>   sleep(1);
> >> }
> >>
> >> Add the 2 last lines to sleep the program when it reads nothing. The CPU should still
> >> sky-rocket, but passengers will now have 1 second to get inside the rocket :)
> >>
> >> I will try to find something better for 0.104.2 or 0.105 or course :)
> >>
> >> Yves
> >> PS. uncomment back log_source_nonblock(i) because it may have side effects.
> >>
> >> --
> >>
> >>
> >> - Homepage    - http://ymettier.free.fr - http://www.logicacmg.com -
> >> - GPG key     - http://ymettier.free.fr/gpg.txt                    -
> >> - Maitretarot - http://www.nongnu.org/maitretarot/                 -
> >> - Perfparse   - http://perfparse.sf.net/                           -
> >>
> >>
> >
> >
> 
> 
> --
> 
> 
> - Homepage    - http://ymettier.free.fr - http://www.logicacmg.com -
> - GPG key     - http://ymettier.free.fr/gpg.txt                    -
> - Maitretarot - http://www.nongnu.org/maitretarot/                 -
> - Perfparse   - http://perfparse.sf.net/                           -
> 
>