Hi everyone,
This, hopefully, simple series aims at making it easier to look at and
interpret hypervisor scheduling related traces.
In fact, it includes improvements for both how xentrace_format and xenalyze
decode and pretty print a trace collected with scheduling events enabled,
either generic scheduling events or specific events from one of our scheduler.
In fact:
- patches 11-14 improve xenalyze own understanding and dumping of scheduling
events
- patches 07-10 improve the 'formats' file that should be used for
xentrace_format, for the same purpose
- patches 04-06 are small hypervisor changes required for making the
improvement possible
- patches 02-03 are refinements on the position of some trace points
- patch 01 is not really related to this series, it's just Credit1's
code cleanup
After this series, for instance, 'xenalyze --dump-all' looks like this:
0.000575665 -..--..x ..... . d?v? runstate_change d0v10 runnable->running
0.000621704 -..--..x ..... . d0v10 vcpu_block d0v10
0.000623592 -..--..x ..... . d0v10 sched_switch prev d0, run for 48.488us
0.000623792 -..--..x ..... . d0v10 sched_switch next d32767, was runnable
for 48.488us,
0.000624017 -..--..x ..... . d0v10 sched_switch prev d0v10 next d32767v7
0.000624309 -..--..x ..... . d0v10 runstate_change d0v10 running->blocked
0.000624650 -..--..x ..... . d?v? runstate_change d32767v7 runnable->running
0.000806574 x..--..- ..... . d32767v0 vcpu_wake d0v0
0.000806954 x..--..- ..... . d32767v0 runstate_change d0v0 blocked->runnable
0.000807697 x..--..- ..... . d32767v0 csched:runq_tickle, cpu 0
0.000810162 x..--..- ..... . d32767v0 sched_switch prev d32767, run for
279.105us
0.000810340 x..--..- ..... . d32767v0 sched_switch next d0, was runnable for
2.516us, next slice 30000.0us
0.000810625 x..--..- ..... . d32767v0 sched_switch prev d32767v0 next d0v0
0.000810850 x..--..- ..... . d32767v0 runstate_change d32767v0
running->runnable
0.000811205 x..--..- ..... . d?v? runstate_change d0v0 runnable->running
0.000833005 |..--..- ..x.. . d32768v11 vcpu_wake d0v8
0.000833596 |..--..- ..x.. . d32768v11 runstate_change d0v8 blocked->runnable
Thanks and Regards,
Dario
---
Dario Faggioli (14):
xen: sched: __runq_tickle takes a useless cpu parameter
xen: sched: move up the trace record for vcpu_wake and vcpu_sleep
xen: sched: fi position of TRC_SCHED_DOM_{ADD,REM}
xen: credit2: pack trace data better for xentrace_format
xen: RTDS: pack trace data better for xentrace_format
xen: sched: tracing: enable TSC tracing for all events
xentrace: formats: update format of scheduling events
xentrace: formats: add events from Credit scheduler
xentrace: formats: add events from Credit2 scheduler
xentrace: formats: add events from RTDS scheduler
xenalyze: handle scheduling events
xenalyze: handle Credit1 scheduler events
xenalyze: handle Credit2 scheduler events
xenalyze: handle RTDS scheduler events
tools/xentrace/formats | 44 ++++-
tools/xentrace/xenalyze.c | 373 ++++++++++++++++++++++++++++++++++++++++----
xen/common/domain.c | 1
xen/common/sched_credit.c | 12 +
xen/common/sched_credit2.c | 22 +--
xen/common/sched_rt.c | 29 +--
xen/common/schedule.c | 20 +-
7 files changed, 411 insertions(+), 90 deletions(-)
--
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
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