It might be that I haven't been clear in my request. What I want is:
1. No printouts while the program is running (as provided by -c).
2. A summary at the end (as provided by -c).
3. The summary should report syscall wall clock times (as provided by -T).
-C doesn't help; it just adds per-call printouts (which I don't want).
If I do "strace -C -T sleep 1", the summary at the end still says that
nanosleep took no time:
-nan 0.000000 0 1 nanosleep
So this still doesn't work unfortunately.
johan@transwarp:~$ strace -V
strace -- version 4.5.20
Regards /Johan
2011/1/14 Dmitry V. Levin <l...@altlinux.org>:
> On Tue, Nov 06, 2007 at 04:45:57PM +0100, Johan Walles wrote:
>> 2007/11/1, Roland McGrath <rol...@redhat.com>:
>> > -T requests timing information in the line printed for each call made.
>> > -c requests that those lines never be printed, so -T does not mean anything
>> > with -c. The times printed by -T are real (wall clock) time. As the
>> > description you quoted says (on Linux), -c collects system time (CPU time
>> > in kernel mode) instead.
>>
>> In that case I've mis-understood the docs. I'll open a new
>> enhancement request on strace.
>
> Starting with strace-4.5.20, there is a -C option to combine regular
> and -c output. You can use it to achieve the desired effect:
>
> $ strace -C -T sleep 2 2>&1 | grep nanosleep
> nanosleep({2, 0}, NULL) = 0 <2.002724>
> -nan 0.000000 0 1 nanosleep
>
> If you feel that man page is not quite clear on the subject,
> please suggest a better wording.
>
>
> --
> ldv
>
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