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From: miloody@gmail.com (loody)
To: kernelnewbies@lists.kernelnewbies.org
Subject: can we measure the traffic between user and kernel mode
Date: Thu, 27 Jan 2011 21:48:53 +0800	[thread overview]
Message-ID: <AANLkTik4ZhxLCJJFEU=RmSWDjKEgusUmp-QvxBx5f7Vd@mail.gmail.com> (raw)
In-Reply-To: <AANLkTikZnE39b34UowE9OPW=dqfHr_d8oFtY2kb+mbgP@mail.gmail.com>

hi all:

2011/1/27 Mulyadi Santosa <mulyadi.santosa@gmail.com>:
> On Thu, Jan 27, 2011 at 12:56, loody <miloody@gmail.com> wrote:
>> I got a user-mode application without symbol and source, and it keeps
>> console no response about 2 mins.
>> I just want to know whether it is busy on processing itself or do the
>> context switch frequently for calling kernel drivers at that time.
>
> well then, strace/ltrace is probably the right tool to do the job :)
> or just use /proc/<pid>/stack :)
I have tried the suggestions you gave. :)

Can I combine all the message together?
Supposedly, my console shows:
A begins
A finish
B begins
B finish
and I measure 2mins from '#A finish' to "#B begins".

I can "strace -o -tt 123 a.out" before "A begin" but how could I
combine console output with the content of strace?
such as
A begins
strace content ......
A finish
strace content ......
B begins
strace content ......
B finish

appreciate your kind help :-)
miloody

  parent reply	other threads:[~2011-01-27 13:48 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-27  3:42 can we measure the traffic between user and kernel mode loody
2011-01-27  4:41 ` Alexandre Courbot
2011-01-27  5:02 ` Mulyadi Santosa
2011-01-27  5:56   ` loody
2011-01-27  6:20     ` Mulyadi Santosa
2011-01-27 11:56       ` Pravin Shedage
2011-01-27 13:48       ` loody [this message]
2011-01-27 17:45         ` Mulyadi Santosa
2011-01-30  7:50           ` loody
2011-01-28  1:07         ` Alexandre Courbot
2011-01-30  8:07           ` loody
2011-01-31  1:38             ` Alexandre Courbot
2011-01-31  1:40               ` Alexandre Courbot
2011-01-27  5:56 ` Michael Blizek

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