Red Hat Bugzilla – Bug 63986
Need way to determine CPU load
Last modified: 2007-04-18 12:42:17 EDT
We need some simple way to determine available CPU resources when doing
something like serial tests. Presently, all I can say is that at <baudrate X> it
starts falling apart.
Would be nice if I could say that, at <baudrate X> CPU utilization is >100%
explaining the boards inability to run at this baudrate. At <baudrate X-1> the
CPU utilization is 70% leaving little room to application processing...
You get the idea. Would be nice to have in other situations too - such as
recently when I worked on playmepeg stuff and thought the board was really slow.
Turned out the demo was holding back in attempt to match sync. A CPU load
readout would have saved me some time in that situation.
Maybe the techniques used for the network tests (look at nc6_test_slave) would
be useful here. They establish a background load level using some number of
computationally intensive threads, along with being able to measure the actual
idle-ness of the processor.
More relevant is the stuff that Andrew Lunn wrote for CPU usage as per
This bug has moved to http://bugs.ecos.sourceware.org/show_bug.cgi?id=63986