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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: Sun, 30 Jan 2011 16:07:35 +0800	[thread overview]
Message-ID: <AANLkTinrr=OqCW+ssw93_D5Tunjo3cPoAFeHD95kRNkR@mail.gmail.com> (raw)
In-Reply-To: <AANLkTinHkU=gXf191OJWe6zYy02smdDbqSf-6qo-EFzk@mail.gmail.com>

hi:
2011/1/28 Alexandre Courbot <gnurou@gmail.com>:
>> I can "strace -o -tt 123 a.out" before "A begin" but how could I
>> combine console output with the content of strace?
>
> strace does output to stderr unless you specify the -o option. So by
> using something like
>
> $ strace -tt your_program
>
> or
>
> $ strace -tt your_program &> log.txt
>
> you will have both outputs intermingled. Note that the console output
> of your program will appear in the middle of the corresponding write()
> system call.
I have tried both ways you mentioned.
in case 1:
it did interleave the output of standard output with standard error.
in case 2:
the standard output seems will be collect for flush at later,
combine.strace.txt.
(I attach the testing result for your reference.)
theoretically, file re-direction should not be effect the content of
output, right?
appreciate your help :-)
miloody.
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  reply	other threads:[~2011-01-30  8:07 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
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 [this message]
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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