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From: ali.akyurek.ext@siemens.com (Akyurek, Ali (EXT))
Subject: [ltt-dev] Interpreting tracing results
Date: Thu, 15 Jan 2009 15:45:03 +0100	[thread overview]
Message-ID: <1E65288790442545B413D69F2A8D27DE045EBBC4@ERLD164A.ww004.siemens.net> (raw)


Hi all,

In my arm machine, context switching takes 1220 or 1221 nanoseconds. 
i thought this time as (start of sched_schedule - start of
whatever_previous_event), Actually that is the time between different
PID values in rows.am i right?

and

Handling of interrupts (i take only the top handlers, not soft ones.)
takes 2441 nanoseconds.
i thought this time as (end of irq_exit - start of irq_entry), am i
right?

Why are these values multiple of 1220 nanoseconds? What is related to? 

Thanks all.




             reply	other threads:[~2009-01-15 14:45 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-01-15 14:45 Akyurek, Ali (EXT) [this message]
2009-01-15 15:18 ` Mathieu Desnoyers
2009-01-15 17:31   ` Akyurek, Ali (EXT)
2009-01-15 17:53     ` Mathieu Desnoyers
     [not found]       ` <1E65288790442545B413D69F2A8D27DE045EBC84@ERLD164A.ww004.siemens.net>
2009-01-15 18:20         ` Mathieu Desnoyers
2009-01-16  4:48           ` [ltt-dev] Interpreting tracing results - jiffies TSC patch for 2.6.24 ARM Venu A
2009-01-16  4:48             ` Venu A
2009-01-16  4:48             ` Venu A
     [not found]             ` <1E65288790442545B413D69F2A8D27DE045EC0ED@ERLD164A.ww004.siemens.net>
2009-01-17  5:08               ` [ltt-dev] " Venu A
2009-01-20  2:58                 ` Mathieu Desnoyers
2009-01-28 17:05             ` [ltt-dev] Maybe an answer to your question -application thread calling gettimeofday in a loop- Akyurek, Ali (EXT)

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