This is wrong:
https://github.com/richidubey/rtems/blob/c3162134d3fd7d4d46ec01609d81bdb62bc818af/cpukit/score/src/schedulerstrongapa.c#L182
It assumes the Chain_Node is at the start of the struct
Scheduler_strong_APA_Node.
On Sun, Aug 16, 2020 at 11:34 AM Richi Dubey <richidu...@gmail.com> wrote:
>
> Hi,
>
> The gdb trace above refers to this code where the items in all_Nodes chain
> are checked. The items in the chain are getting inserted here, before which
> on line 763, the Affinity of the items is set to all the online processors.
> Why does the gdb show the Affinity of the node as 0 then? How is this
> possible? Please advise.
>
> On Sun, Aug 16, 2020 at 5:48 PM Richi Dubey <richidu...@gmail.com> wrote:
>>
>> Oh, I printed the variable value too early. Thanks for your help.
>>
>> On Sat, Aug 15, 2020 at 7:24 PM Gedare Bloom <ged...@rtems.org> wrote:
>>>
>>> On Sat, Aug 15, 2020 at 3:15 AM Richi Dubey <richidu...@gmail.com> wrote:
>>> >
>>> > Hi,
>>> >
>>> > With reference to the code (github link), it aims to check if the Affinty
>>> > of a node is set to 0 by calling the function _Processor_mask_Is_zero.
>>> >
>>> > While debugging with gdb, I can see using 'p' command that the variable
>>> > is indeed 0 but after the variable gets passed to the function, the value
>>> > of the variable isn't 0 anymore. Why is this happening?
>>> >
>>> > Gdb trace:
>>> > ----------------------------------------------------------------------
>>> > (gdb)
>>> > 0x00118af4 187 _Processor_mask_Is_set(&node->Affinity,
>>> > _Per_CPU_Get_index(curr_CPU) ||
>>> > (gdb)
>>> > 0x00118af6 187 _Processor_mask_Is_set(&node->Affinity,
>>> > _Per_CPU_Get_index(curr_CPU) ||
>>> > (gdb) p &node->Affinity
>>> > $8 = (Processor_mask *) 0x200efc <_Thread_Objects+2172>
>>> address 0x200efc
>>>
>>> > (gdb) p node->Affinity
>>> > $9 = {
>>> > __bits = {0}
>>> > }
>>> > (gdb) si
>>> > 0x00118af8 187 _Processor_mask_Is_set(&node->Affinity,
>>> > _Per_CPU_Get_index(curr_CPU) ||
>>> > (gdb)
>>> > 190 _Processor_mask_Is_zero( &node->Affinity ) )
>>> > (gdb)
>>> > 0x00118afc 190 _Processor_mask_Is_zero( &node->Affinity ) )
>>> > (gdb)
>>> > 0x00118afe 190 _Processor_mask_Is_zero( &node->Affinity ) )
>>> > (gdb)
>>> > 0x00118b00 190 _Processor_mask_Is_zero( &node->Affinity ) )
>>> > (gdb)
>>> > _Processor_mask_Is_zero (mask=0x203580 <_Per_CPU_Information>) at
>>> > /home/richi/quick-start/src/rtems/cpukit/include/rtems/score/processormask.h:75
>>> > 75 {
>>> > (gdb)
>>> > 0x0011726a 75 {
>>> > (gdb)
>>> > 0x0011726c 75 {
>>> > (gdb) p mask
>>> > $10 = (const Processor_mask *) 0x203580 <_Per_CPU_Information>
>>> address 0x203580
>>>
>>> You're not looking at the same memory location
>>>
>>> > (gdb) p *mask
>>> > $11 = {
>>> > __bits = {2126656}
>>> > }
>>> > ------------------------------------------------------------
>>> >
>>> > Please provide your views on this.
>>> > Thanks,
>>> > Richi,
>>> > _______________________________________________
>>> > devel mailing list
>>> > devel@rtems.org
>>> > http://lists.rtems.org/mailman/listinfo/devel
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