Lines Matching refs:of
4 The xenmon tools make use of the existing xen tracing feature to provide fine
5 grained reporting of various domain related metrics. It should be stressed that
6 the xenmon.py script included here is just an example of the data that may be
7 displayed. The xenbake demon keeps a large amount of history in a shared memory
10 For each domain, xenmon reports various metrics. One part of the display is a
11 group of metrics that have been accumulated over the last second, while another
12 part of the display shows data measured over 10 seconds. Other measurement
18 o The number of times that a domain was scheduled to run (ie, dispatched) over
25 o Usage expressed as a percentage of the measurement interval
26 o Average cpu time used during each execution of the domain
32 amount of time the domain spent in the "runnable" state (or on the run queue)
36 o Wait time expressed as a percentage of the measurement interval
37 o Average waiting time for each execution of the domain
42 the amount of time the domain spent not needing/wanting the cpu because it was
46 o Blocked time expressed as a percentage of the measurement interval
61 This is a rough measure of I/O requested by the domain. The number of page
63 number of pages exchanged may not accurately reflect the number of bytes
65 protocols, etc. But it does give a good sense of the magnitude of I/O being
68 o Total number of page exchanges during the measurement interval
69 o Average number of page exchanges per execution of the domain
77 - xenmon also has an option (-n) to output log data to a file instead of the
80 - Xenmon.py appears to create 1-2% cpu overhead; Part of this is just the
81 overhead of the python interpreter. Part of it may be the number of trace
82 records being generated. The number of trace records generated can be
90 and specify the number of memory pages as a parameter. The default is 20.
92 - If you create a lot of domains, or repeatedly kill a domain and restart it,
94 This is a bug that is due to xenbaked's treatment of domain id's vs. domain
101 o I/O Count batching to reduce number of trace records generated
105 We have written a case study which demonstrates some of the usefulness of