Instrumenting context switches

[Stone, Joshua I]

On Wednesday, November 29, 2006 3:26 PM, Perry Cheng wrote:
> Using some example code, I tried to instrument context switching by
> adding a probe to the method __switch_to.  Some documentation had
> suggested that certain versions of the systemtap could not handle
> instrumenting context_switch.

The problems with resolving the context_switch function have been fixed
for a while, but there's still sometimes issues accessing the parameters
of inline functions.  See bugzilla #1155.
http://sources.redhat.com/bugzilla/show_bug.cgi?id=1155

Using __switch_to is not an option on all platforms -- on IA64 it is a
macro, and on x86_64 it is blacklisted (bz2086).


Josh