On Fri, Sep 25, 2020 at 08:32:24PM +0100, Valentin Schneider wrote:
> The IRC handout so far is:
I meant to go post a new version today; but of course cleanup took
longer than expected.
In any case, there's a slightly updated version here:
git://git.kernel.org/pub/scm/linux/kernel/git/peterz/
On 25/09/2020 19:49, Valentin Schneider wrote:
>
> On 25/09/20 13:19, Valentin Schneider wrote:
>> On 25/09/20 12:58, Dietmar Eggemann wrote:
>>> With Valentin's print_rq() inspired test snippet I always see one of the
>>> RT user tasks as the second guy? BTW, it has to be RT tasks, never
>>> trig
On 25/09/20 19:17, Sebastian Andrzej Siewior wrote:
> On 2020-09-21 18:35:57 [+0200], Peter Zijlstra wrote:
>> Hi,
> Hi,
>
>> Here's my take on migrate_disable(). It avoids growing a second means of
>
> I have here:
>
> |005: numa_remove_cpu cpu 5 node 0: mask now 0,3-4,6-7
> |007: smpboot: CPU 5
On 2020-09-21 18:35:57 [+0200], Peter Zijlstra wrote:
> Hi,
Hi,
> Here's my take on migrate_disable(). It avoids growing a second means of
I have here:
|005: numa_remove_cpu cpu 5 node 0: mask now 0,3-4,6-7
|007: smpboot: CPU 5 is now offline
|006: [ cut here ]
|006: rq->
On 25/09/20 13:19, Valentin Schneider wrote:
> On 25/09/20 12:58, Dietmar Eggemann wrote:
>> With Valentin's print_rq() inspired test snippet I always see one of the
>> RT user tasks as the second guy? BTW, it has to be RT tasks, never
>> triggered with CFS tasks.
>>
>> [ 57.849268] CPU2 nr_run
On 25/09/20 12:58, Dietmar Eggemann wrote:
> On 25/09/2020 12:10, Peter Zijlstra wrote:
>> On Fri, Sep 25, 2020 at 11:12:09AM +0200, Dietmar Eggemann wrote:
>>
>>> I get this when running 6 (periodic) RT50 tasks with CPU hp stress on my
>>> 6 CPU JUNO board (!CONFIG_PREEMPT_RT).
>>>
>>> [ 55.49
On 25/09/2020 12:10, Peter Zijlstra wrote:
> On Fri, Sep 25, 2020 at 11:12:09AM +0200, Dietmar Eggemann wrote:
>
>> I get this when running 6 (periodic) RT50 tasks with CPU hp stress on my
>> 6 CPU JUNO board (!CONFIG_PREEMPT_RT).
>>
>> [ 55.490263] [ cut here ]
>> [ 55
On Fri, Sep 25, 2020 at 11:12:09AM +0200, Dietmar Eggemann wrote:
> I get this when running 6 (periodic) RT50 tasks with CPU hp stress on my
> 6 CPU JUNO board (!CONFIG_PREEMPT_RT).
>
> [ 55.490263] [ cut here ]
> [ 55.505261] Modules linked in:
> [ 55.508322] CPU: 3
On 21/09/2020 18:35, Peter Zijlstra wrote:
> Hi,
>
> Here's my take on migrate_disable(). It avoids growing a second means of
> changing the affinity, documents how the things violates locking rules but
> still mostly works.
>
> It also avoids blocking completely, so no more futex band-aids requi
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