On Sun, 5 Sep 2004, Andi Gutmans wrote: > At 03:13 PM 9/5/2004 -0700, Rasmus Lerdorf wrote: > >On Sun, 5 Sep 2004, Russ Garrett wrote: > > > APC doesn't seem to work at all as a DSO, I'll try it statically later. > > > >I run it on thousands of servers as a DSO. What are you seeing that would > >make you think this? > > > >Also, if you are running PHP as a DSO and pushing your CPU you might want > >to compile it non-pic. Use this patch and reconfigure/recompile: > > > > http://lerdorf.com/non-pic.txt > > Any reason we aren't putting this into the default tree? Does it break on > any systems?
Yes, building a non-pic shared library doesn't work everywhere. But, the way to put it in would be to write the appropriate autoconf/automake/libtool magic to check this which I haven't had the energy for. On systems that support non-pic shared libraries it makes a lot of sense to build PHP that way. libphp.so is not a general-purpose shared library, it is a very specific shared library built to only be loaded into a single binary for the most part, so you don't lose anything by going non-pic and you gain 10%-20% performance.
Yeah I know non-pic doesn't work on all platforms but I gathered that -prefer-non-pic only uses PIC on platforms where non-PIC dso's aren't supported. I guess I'm wrong and we do need better autoconf checks.
Maybe until someone has the energy to write something general we could do a specific ia32/Linux check where this is known to work.
Andi
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