#7 Cannot access performance Data

[Anonymous]

Hello,
I cannot access the performance data :
RegistryKey r = new RegistryKey
(RootKey.HKEY_PERFORMANCE_DATA ,"");
thows an exception

Exception in thread "main"
ca.beq.util.win32.registry.RegistryException: Attempt
to open registry key "(null)" failed with error code 6
at
ca.beq.util.win32.registry.RegistryKey.hasValues(Native
Method)
at Mregistry.main(Mregistry.java:39)

I try to retreive the perf data counters values.

I am doing something wrong?

thanks

[Matt Hilliard]

Logged In: YES
user_id=969951

Having never cared anything about HKEY_PERFORMANCE_DATA, the
fact it has bizarre calling semantics--different than all
the other HKEYs (and a Microsoft kludge, if ever I saw
one)--got overlooked.

I think we can safely classify this as either a bug, since
we should never call RegOpenKey using this HKEY, yet we try
and make that happen nonetheless; or as a feature request
since using this HKEY isn't part of the normal use case
under Windows and it would be boonful to add it..

From the bugfix standpoint, we should remove performance
from the rootkeys.

From the feature request standpoiont, we'll need to add some
convoluted logic in the native code to deal with it as a
special case, and we'll need to spec out the semantics of
how jRK will wrap it, since it is a different beast than the
rest of the Registry interface. I'm leaning more in this
direction since it will be more interesting, but it will
definitely take some time to get it all "looking pretty."

In the meantime, while the sematince of all of this get
sorted out, the bottome line is we don't support this HKEY.

Matt

[Nobody/Anonymous]

Logged In: NO

Thanks a lot for clarifying.

[Matt Hilliard]

Logged In: YES
user_id=969951

Hey.
In tracking down the data representations, I've discovered
there are no performance counters on my system. I don't
really want to get too tied up with the mess of creating
counters, if I do, this issue is going further on the
backburner--is there a simple way to get a representative
performance counter installed on my system?

--Matt

[Nobody/Anonymous]

Logged In: NO

Can you sort out the bug where if you go too deep and find
a node with values AND other nodes, it will not see the
other nodes just the values. This is very annoying.

[Matt Hilliard]

Logged In: YES
user_id=969951

Sure. Can you file this as its own bug please and give me
some *useful* info like what key you see this on, what sub
keys I should be seeing, and what operating system this
occurs on?
Hand waving at a bug I've never seen before and have maybe
20 minutes a week to track is also very annoying.