resolving probe point context_switch

["Jason Yeh" <jason dot yeh at amd dot com>]

Hi,

I have been trying to get Systemtap to place probe in the scheduler and 
hoping to experiment using Systemtap to emulate certain behavior of 
Perfmon2 similar to what Frank mentioned in the email titled 
"Model-Specific Register". Running the example sched_snoop.stp was 
successful only on Athlon XP 32-bit laptop running Suse 10.1 using 
2.6.16.13 kernel. Opteron machines running kernel 2.6.18 on Ubuntu 
(compiled using gcc 4.1), Fedora Core 6, and Suse 10.1 will end with 
subsets of the following errors:

semantic error: no match for probe point
while: resolving probe point kernel.inline("context_switch")
semantic error: no match for probe point
while: resolving probe point scheduler.cpu_off
semantic error: no match for probe point
while: resolving probe point kernel.inline("finish_task_switch")
semantic error: no match for probe point
while: resolving probe point scheduler.cpu_on
semantic error: no match for probe point
while: resolving probe point kernel.inline("pull_task")
semantic error: no match for probe point
while: resolving probe point scheduler.migrate
semantic error: no match for probe point
while: resolving probe point kernel.inline("idle_balance")
semantic error: no match for probe point
while: resolving probe point scheduler.balance

I have seem "pull_task" being problematic in previous emails, but could 
not find any workaround mentioned. Is there any workaround for these 
unresolved probes? Thanks.

Jason