NuttX become the best SMP RTOS.
Thanks
Xiang
-Original Message-
From: spudaneco
Sent: Tuesday, May 12, 2020 12:52 PM
To: dev@nuttx.apache.org
Cc: Nakamura, Yuuichi (Sony)
Subject: RE: enter/leave_critical_section() calls in the user space library
I don't understand why you need to d
x.apache.org Cc: "Nakamura, Yuuichi (Sony)"
Subject: RE: enter/leave_critical_section() calls
in the user space library Thanks for accepting my PR.Now it's ok for protected
build with uniprocessor case, but not sufficient in SMP case.The following
files included in the u
e may have to be moved into the kernel space.
Thanks,
Yuuichi Nakamura
> -Original Message-
> From: Xiang Xiao
> Sent: Monday, May 11, 2020 3:20 PM
> To: dev@nuttx.apache.org
> Subject: RE: enter/leave_critical_section() calls in the user space library
>
> But we ne
Sent: Monday, May 11, 2020 12:35 PM
To: dev@nuttx.apache.org
Subject: Re: enter/leave_critical_section() calls in the user space library
> From this link:
> https://linux.die.net/man/3/setlogmask
> logmask has per task scope not per thread scope. So we still suffer the
> concurrent
From this link:
https://linux.die.net/man/3/setlogmask
logmask has per task scope not per thread scope. So we still suffer the
concurrent issue if we change to group-specific logmask.
The same text appears in the more authoritative Opengroup.org web page:
https://pubs.opengroup.org/onlinepu
On Sun, May 10, 2020 at 11:35 PM Xiang Xiao wrote:
> From this link:
> https://linux.die.net/man/3/setlogmask
> logmask has per task scope not per thread scope. So we still suffer the
> concurrent issue if we change to group-specific logmask.
So if I understand correctly, that means that moving
org
Subject: Re: enter/leave_critical_section() calls in the user space library
>
>> One way to make this work correctly would be to remove the logmask as
>> a global variable and, instead, put the logic mask in the group
>> structure or in the TCB structure. That would make
One way to make this work correctly would be to remove the logmask as
a global variable and, instead, put the logic mask in the group
structure or in the TCB structure. That would make logmask thread
safe (in the second case). This would be the preferred solution.
This solution would work
One way to make this work correctly would be to remove the logmask as
a global variable and, instead, put the logic mask in the group
structure or in the TCB structure. That would make logmask thread
safe (in the second case). This would be the preferred solution. This
solution would work.
I think enter/leave_critical_section() call should be replaced with
semaphore/mutex/spinlock/atomic_ in most case, not only more standard but
also more fast in SMP. Especially, multiple core MCU/DSP design extend from
desktop to mobile and embedded now.
I would consider just removing the ente
Hi all,
I have tried to simply replace enter/leave_critical_section() into
pthread_mutex if not flat build, and issued the PR.
It seems works well in uniprocessor, but there are a few remaining
enter/leave_critical_section() calls if SMP is used.
Thanks,
Yuuichi Nakamura
> -Original Messag
I think enter/leave_critical_section() call should be replaced with
semaphore/mutex/spinlock/atomic_ in most case, not only more standard but
also more fast in SMP. Especially, multiple core MCU/DSP design extend from
desktop to mobile and embedded now.
-Original Message-
From: Nakamura, Y
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