[Gems-users] Re: Magic instruction fails to stop cpu & enter debugger

["lopamudra chatterjee" <lopamudralopa@xxxxxxxxxxxxxx>]

 Hi,

Thanks for your quick reply. I made all the stall_times =0 & now it is working fine.

Regards,
Lopamudra Chatterjee

On Mon, 07 Jun 2010 19:16:48 +0530  wrote
>The error you are seeing happens because the target OS cannot deliver an interrupt to a cpu (in this case cpu7). The OS thinks the CPU is malfunctioning, and panics.

>

Usually, when I see this error, it is because someone has disabled a CPU. This sort of thing is unrelated to simple magic breakpoints. 

>

Are you disabling CPUs? If so, you are leaving them disabled for too long.

Are you running with a checkpoint you took while Ruby was loaded? If so, you must manually edit the checkpoint to set all CPU stall_times to zero.

>

Regards,

Dan
>
>

On Mon, Jun 7, 2010 at 3:52 AM, lopamudra chatterjee <lopamudralopa@xxxxxxxxxxxxxx> wrote:
>

Hi,
>
>I have used the MAGIC(0x40000) in code before start of parallel section. 
>Now if before loading ruby I do magic-break-enable & start the programs then I am getting the following error :
>
>send mondo timeout [4836707 NACK 0 BUSY]
>IDSR 0x80 cpuids:0x7
>panic:failed to stop cpu7.
>panic[cpu15]/thread=30002255000:send mondo set :timeout
>Then it shows message telling that it fails to stop all the processors.& then it enters a debugger.
>
>But this does not occur if I first load ruby & then start the processes. 
>My target is a 16 core abisko machine running solaris 10 & benchmark is water.
>
>Any idea how this error could be prevented?
>
>Thanks & Regards,
>Lopamudra Chatterjee
>
>

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