Slow pmdapapi fetching

[Nathan Scott <nathans@xxxxxxxxxx>]

Hi all,

I noticed pmdapapi timed out for me on fetch (the old pmcd
terminating connection to slow-responding PMDA after 5secs
chestnut) and after a little digging and chatting to Lukas
it was found that sometimes it takes a very long time for
auto-enable-everything mode to fire up...

$ time sudo pminfo -v papi > /dev/null
real 0m5.316s
user 0m0.006s
sys 0m0.018s

and then subsequently, too ...
$ time sudo pminfo -v papi > /dev/null
real 0m1.765s
user 0m0.012s
sys 0m0.013s

This is on my laptop (four CPUs), Lukas sees slightly better
numbers locally; but always quite slow when compared to other
PMDAs.  The elapsed vs CPU utilised numbers suggest there's
plenty of room for improvement, somewhere (maybe below PAPI
interfaces though?).

cheers.

--
Nathan