You are viewing a plain text version of this content. The canonical link for it is here.
Posted to modperl@perl.apache.org by Tim Bunce <Ti...@pobox.com> on 2010/04/28 19:48:55 UTC
Getting NYTProf to work with vhosts that use PerlOptions +Parent
This is proving to be tricky.
If I load Devel::NYTProf::Apache[1] in the main part of httpd.conf then
I get a profile that includes all the activity *except* for any activity
in vhosts that use +Parent.
If I load it inside the VirtualHost section then I get a profile of
activity within that vhost. Great. Except there's a problem...
For a profile to be useful it must be terminated properly. Devel::NYTProf
does that using an END block. Devel::NYTProf::Apache does that using
sub child_exit { DB::_finish() }
my $s = Apache2::ServerUtil->server;
$s->push_handlers(PerlChildExitHandler => \&child_exit);
That works fine normally, but doesn't work with PerlOptions +Parent.
I get an error:
[error] lookup of 'Devel::NYTProf::Apache::child_exit' failed
I presume that's because the $s doesn't refer to the vhost "I'm in".
I can use $s->next (after require Apache2::ServerRec) to iterate over
the vhosts but I can't see a way to find "my" vhost.
Is there one?
What I'm looking for is some way for *a specific vhost perl interpreter*
to run code at PerlChildExitHandler *in that interpreter*.
Any ideas?
Tim.
p.s. Simply adding END { DB::_finish() } to Devel::NYTProf::Apache gives
me a profile that ends during server initialization because the vhost
perl interpreter is initialized using perl_run() and PL_exit_flags |=
PERL_EXIT_DESTRUCT_END has not been set. So I've now set PL_exit_flags
via NYTProf and that's giving me a usable profile for my limited case.
I've not yet looked-into how to generalise that into code that's work in
normal (non +Parent) case.
[1] http://cpansearch.perl.org/src/TIMB/Devel-NYTProf-3.11/lib/Devel/NYTProf/Apache.pm
Re: Getting NYTProf to work with vhosts that use PerlOptions +Parent
Posted by Tim Bunce <Ti...@pobox.com>.
On Thu, Apr 29, 2010 at 04:02:05PM -0700, Fred Moyer wrote:
> On Thu, Apr 29, 2010 at 4:39 AM, Tim Bunce <Ti...@pobox.com> wrote:
> > On Wed, Apr 28, 2010 at 11:25:14PM -0400, Adam Prime wrote:
> >> Maybe you could try doing the push_handler for the ChildExitHandler
> >> when the ChildInitHandler executes? Just a shot in the dark.
> >
> > Umm, but how to I get the ChildInitHandler handle to use the right perl
> > interpreter?
>
> I just tried to setup a test case but I don't have perl configured
> with ithreads.
>
> Can you do something like this, since each vhost servername is tied to
> that perl intepreter? (warning, untested code)
>
> sub child_exit {
> my $vhost_servername = shift;
>
> my $s = Apache2::ServerUtil->server;
> return unless $s->hostname eq $vhost_servername;
>
> DB::_finish();
> }
>
> $s->push_handlers(PerlChildExitHandler => \&child_exit($s->server_hostname );
The \&child_exit($s->server_hostname) syntax wouldn't work but I'll try
something along those lines. Thanks.
Tim.
Re: Getting NYTProf to work with vhosts that use PerlOptions +Parent
Posted by Fred Moyer <fr...@redhotpenguin.com>.
On Thu, Apr 29, 2010 at 4:39 AM, Tim Bunce <Ti...@pobox.com> wrote:
> On Wed, Apr 28, 2010 at 11:25:14PM -0400, Adam Prime wrote:
>> Maybe you could try doing the push_handler for the ChildExitHandler
>> when the ChildInitHandler executes? Just a shot in the dark.
>
> Umm, but how to I get the ChildInitHandler handle to use the right perl
> interpreter?
I just tried to setup a test case but I don't have perl configured
with ithreads.
Can you do something like this, since each vhost servername is tied to
that perl intepreter? (warning, untested code)
sub child_exit {
my $vhost_servername = shift;
my $s = Apache2::ServerUtil->server;
return unless $s->hostname eq $vhost_servername;
DB::_finish();
}
$s->push_handlers(PerlChildExitHandler => \&child_exit($s->server_hostname );
>
> Tim.
>
>> Adam
>>
>> Tim Bunce wrote:
>> >This is proving to be tricky.
>> >
>> >If I load Devel::NYTProf::Apache[1] in the main part of httpd.conf then
>> >I get a profile that includes all the activity *except* for any activity
>> >in vhosts that use +Parent.
>> >
>> >If I load it inside the VirtualHost section then I get a profile of
>> >activity within that vhost. Great. Except there's a problem...
>> >
>> >For a profile to be useful it must be terminated properly. Devel::NYTProf
>> >does that using an END block. Devel::NYTProf::Apache does that using
>> >
>> > sub child_exit { DB::_finish() }
>> >
>> > my $s = Apache2::ServerUtil->server;
>> > $s->push_handlers(PerlChildExitHandler => \&child_exit);
>> >
>> >That works fine normally, but doesn't work with PerlOptions +Parent.
>> >I get an error:
>> > [error] lookup of 'Devel::NYTProf::Apache::child_exit' failed
>> >
>> >I presume that's because the $s doesn't refer to the vhost "I'm in".
>> >I can use $s->next (after require Apache2::ServerRec) to iterate over
>> >the vhosts but I can't see a way to find "my" vhost.
>> >
>> >Is there one?
>> >
>> >What I'm looking for is some way for *a specific vhost perl interpreter*
>> >to run code at PerlChildExitHandler *in that interpreter*.
>> >
>> >Any ideas?
>> >
>> >Tim.
>> >
>> >p.s. Simply adding END { DB::_finish() } to Devel::NYTProf::Apache gives
>> >me a profile that ends during server initialization because the vhost
>> >perl interpreter is initialized using perl_run() and PL_exit_flags |=
>> >PERL_EXIT_DESTRUCT_END has not been set. So I've now set PL_exit_flags
>> >via NYTProf and that's giving me a usable profile for my limited case.
>> >I've not yet looked-into how to generalise that into code that's work in
>> >normal (non +Parent) case.
>> >
>> >[1] http://cpansearch.perl.org/src/TIMB/Devel-NYTProf-3.11/lib/Devel/NYTProf/Apache.pm
>>
>>
>
Re: Getting NYTProf to work with vhosts that use PerlOptions +Parent
Posted by Tim Bunce <Ti...@pobox.com>.
On Wed, Apr 28, 2010 at 11:25:14PM -0400, Adam Prime wrote:
> Maybe you could try doing the push_handler for the ChildExitHandler
> when the ChildInitHandler executes? Just a shot in the dark.
Umm, but how to I get the ChildInitHandler handle to use the right perl
interpreter?
Tim.
> Adam
>
> Tim Bunce wrote:
> >This is proving to be tricky.
> >
> >If I load Devel::NYTProf::Apache[1] in the main part of httpd.conf then
> >I get a profile that includes all the activity *except* for any activity
> >in vhosts that use +Parent.
> >
> >If I load it inside the VirtualHost section then I get a profile of
> >activity within that vhost. Great. Except there's a problem...
> >
> >For a profile to be useful it must be terminated properly. Devel::NYTProf
> >does that using an END block. Devel::NYTProf::Apache does that using
> >
> > sub child_exit { DB::_finish() }
> >
> > my $s = Apache2::ServerUtil->server;
> > $s->push_handlers(PerlChildExitHandler => \&child_exit);
> >
> >That works fine normally, but doesn't work with PerlOptions +Parent.
> >I get an error:
> > [error] lookup of 'Devel::NYTProf::Apache::child_exit' failed
> >
> >I presume that's because the $s doesn't refer to the vhost "I'm in".
> >I can use $s->next (after require Apache2::ServerRec) to iterate over
> >the vhosts but I can't see a way to find "my" vhost.
> >
> >Is there one?
> >
> >What I'm looking for is some way for *a specific vhost perl interpreter*
> >to run code at PerlChildExitHandler *in that interpreter*.
> >
> >Any ideas?
> >
> >Tim.
> >
> >p.s. Simply adding END { DB::_finish() } to Devel::NYTProf::Apache gives
> >me a profile that ends during server initialization because the vhost
> >perl interpreter is initialized using perl_run() and PL_exit_flags |=
> >PERL_EXIT_DESTRUCT_END has not been set. So I've now set PL_exit_flags
> >via NYTProf and that's giving me a usable profile for my limited case.
> >I've not yet looked-into how to generalise that into code that's work in
> >normal (non +Parent) case.
> >
> >[1] http://cpansearch.perl.org/src/TIMB/Devel-NYTProf-3.11/lib/Devel/NYTProf/Apache.pm
>
>
Re: Getting NYTProf to work with vhosts that use PerlOptions +Parent
Posted by Adam Prime <ad...@utoronto.ca>.
Maybe you could try doing the push_handler for the ChildExitHandler when
the ChildInitHandler executes? Just a shot in the dark.
Adam
Tim Bunce wrote:
> This is proving to be tricky.
>
> If I load Devel::NYTProf::Apache[1] in the main part of httpd.conf then
> I get a profile that includes all the activity *except* for any activity
> in vhosts that use +Parent.
>
> If I load it inside the VirtualHost section then I get a profile of
> activity within that vhost. Great. Except there's a problem...
>
> For a profile to be useful it must be terminated properly. Devel::NYTProf
> does that using an END block. Devel::NYTProf::Apache does that using
>
> sub child_exit { DB::_finish() }
>
> my $s = Apache2::ServerUtil->server;
> $s->push_handlers(PerlChildExitHandler => \&child_exit);
>
> That works fine normally, but doesn't work with PerlOptions +Parent.
> I get an error:
> [error] lookup of 'Devel::NYTProf::Apache::child_exit' failed
>
> I presume that's because the $s doesn't refer to the vhost "I'm in".
> I can use $s->next (after require Apache2::ServerRec) to iterate over
> the vhosts but I can't see a way to find "my" vhost.
>
> Is there one?
>
> What I'm looking for is some way for *a specific vhost perl interpreter*
> to run code at PerlChildExitHandler *in that interpreter*.
>
> Any ideas?
>
> Tim.
>
> p.s. Simply adding END { DB::_finish() } to Devel::NYTProf::Apache gives
> me a profile that ends during server initialization because the vhost
> perl interpreter is initialized using perl_run() and PL_exit_flags |=
> PERL_EXIT_DESTRUCT_END has not been set. So I've now set PL_exit_flags
> via NYTProf and that's giving me a usable profile for my limited case.
> I've not yet looked-into how to generalise that into code that's work in
> normal (non +Parent) case.
>
> [1] http://cpansearch.perl.org/src/TIMB/Devel-NYTProf-3.11/lib/Devel/NYTProf/Apache.pm