Hi!
> > That is likely POSIX conformance bug, since POSIX explicitly states that
> > sigtimedwait() shall use CLOCK_MONOTONIC to measure the timeout.
> >
> > "If the Monotonic Clock option is supported, the CLOCK_MONOTONIC clock
> > shall be used to measure the time interval specified by the
Hi!
> > That is likely POSIX conformance bug, since POSIX explicitly states that
> > sigtimedwait() shall use CLOCK_MONOTONIC to measure the timeout.
> >
> > "If the Monotonic Clock option is supported, the CLOCK_MONOTONIC clock
> > shall be used to measure the time interval specified by the
On Thu, 23 Jun 2016, Cyril Hrubis wrote:
> > 1) sigtimedwait() is unusual in that it uses the jiffies timer. Most
> >system call timeouts (including specifically the one in FUTEX_WAIT)
> >use the high-resolution timer subsystem, which is a whole different
> >animal with tighter
On Thu, 23 Jun 2016, Cyril Hrubis wrote:
> > 1) sigtimedwait() is unusual in that it uses the jiffies timer. Most
> >system call timeouts (including specifically the one in FUTEX_WAIT)
> >use the high-resolution timer subsystem, which is a whole different
> >animal with tighter
Hi!
> Two points:
> 1) sigtimedwait() is unusual in that it uses the jiffies timer. Most
>system call timeouts (including specifically the one in FUTEX_WAIT)
>use the high-resolution timer subsystem, which is a whole different
>animal with tighter guarantees, and
That is likely POSIX
Hi!
> Two points:
> 1) sigtimedwait() is unusual in that it uses the jiffies timer. Most
>system call timeouts (including specifically the one in FUTEX_WAIT)
>use the high-resolution timer subsystem, which is a whole different
>animal with tighter guarantees, and
That is likely POSIX
On Thu, 23 Jun 2016, George Spelvin wrote:
> Cyril Hrubis wrote:
> > Thomas Gleixner wrote:
> >> Err. You know that the timer expired because sigtimedwait() returns
> >> EAGAIN. And the only thing you can reliably check for is that the timer did
> >> not expired to early. Anything else is
On Thu, 23 Jun 2016, George Spelvin wrote:
> Cyril Hrubis wrote:
> > Thomas Gleixner wrote:
> >> Err. You know that the timer expired because sigtimedwait() returns
> >> EAGAIN. And the only thing you can reliably check for is that the timer did
> >> not expired to early. Anything else is
Cyril Hrubis wrote:
> Thomas Gleixner wrote:
>> Err. You know that the timer expired because sigtimedwait() returns
>> EAGAIN. And the only thing you can reliably check for is that the timer did
>> not expired to early. Anything else is guesswork and voodoo programming.
> But seriously is there a
Cyril Hrubis wrote:
> Thomas Gleixner wrote:
>> Err. You know that the timer expired because sigtimedwait() returns
>> EAGAIN. And the only thing you can reliably check for is that the timer did
>> not expired to early. Anything else is guesswork and voodoo programming.
> But seriously is there a
Hi!
> > While this is true, checking with reasonable error margin works just
> > fine 99% of the time. You cannot really test that timer expires, without
> > setting arbitrary margin.
>
> Err. You know that the timer expired because sigtimedwait() returns
> EAGAIN. And the only thing you can
Hi!
> > While this is true, checking with reasonable error margin works just
> > fine 99% of the time. You cannot really test that timer expires, without
> > setting arbitrary margin.
>
> Err. You know that the timer expired because sigtimedwait() returns
> EAGAIN. And the only thing you can
On Wed, 22 Jun 2016, Cyril Hrubis wrote:
> Hi!
> > > rtbox:~ #
> > > /usr/local/ltp/conformance/interfaces/sigtimedwait/sigtimedwait_1-1.run-test
> > > Test FAILED: sigtimedwait() did not return in the required time
> > > time_elapsed: 1.197057
> > > ...come on, you can do it...
> > > rtbox:~ #
On Wed, 22 Jun 2016, Cyril Hrubis wrote:
> Hi!
> > > rtbox:~ #
> > > /usr/local/ltp/conformance/interfaces/sigtimedwait/sigtimedwait_1-1.run-test
> > > Test FAILED: sigtimedwait() did not return in the required time
> > > time_elapsed: 1.197057
> > > ...come on, you can do it...
> > > rtbox:~ #
Hi!
> > rtbox:~ #
> > /usr/local/ltp/conformance/interfaces/sigtimedwait/sigtimedwait_1-1.run-test
> > Test FAILED: sigtimedwait() did not return in the required time
> > time_elapsed: 1.197057
> > ...come on, you can do it...
> > rtbox:~ #
> >
Hi!
> > rtbox:~ #
> > /usr/local/ltp/conformance/interfaces/sigtimedwait/sigtimedwait_1-1.run-test
> > Test FAILED: sigtimedwait() did not return in the required time
> > time_elapsed: 1.197057
> > ...come on, you can do it...
> > rtbox:~ #
> >
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