Re: [Gems-users] Stall time

[Dan Gibson <degibson@xxxxxxxx>]

After a stall is completed -- either counts down to zero or is cancelled 
via SIMICS_unstall_proc(), Simics always re-issues the request to Ruby. 
So yes, after each stalled transaction completes, Simics re-issues it to 
ruby_operate() again.
Regards,
Dan

pathscale@xxxxxxx wrote:
> Thanks, Dan
> One other thing I'm interested is that
> I've observed that when you return a stall time with SIMICS_RETRY_TIME,
> the same transactions will come before "ruby_operate" next cyle.
> I'm wonderign about that:
> if ruby use SIMICS_unstall_proc to unstall the processor, will be last 
> stalled transaction come to "ruby_operate" again.
> or it just simply graduate?
> Thanks.
>
> 在2008-04-05，"Dan Gibson" <degibson@xxxxxxxx> 写道：
>
>     That is exactly how ruby implements it. I don't know if its the only 
>     way, but it works well.
>     Regards,
>     Dan
>
>     pathscale@xxxxxxx wrote:
>     > Thanks, Dan.
>     > But I wonder how ruby implement it.
>     > Is it by using API SIM_time_post_cycle in function "runRubyEventQueue" ?
>     > Is it the only way to wake up ruby every SIMICS_RUBY_MULTIPLIER cycles 
>     > and run it indepently?
>     > Thanks
>     >
>     > 在2008-04-05，"Dan Gibson" <degibson@xxxxxxxx> 写道：
>     >
>     >     No, but Ruby runs every SIMICS_RUBY_MULTIPLIER cycles independently of 
>     >     whether any new memory requests are presented to Ruby.
>     >
>     >     Regards,
>     >     Dan
>     >
>     >     pathscale@xxxxxxx wrote:
>     >     > Thanks.
>     >     > Does it mean that even you stall a memory transaction with stall time 
>     >     > 200000000000
>     >     > It will come to timing-model again next cycle, anyway?
>     >     >
>     >     > 在2008-04-04，"Dan Gibson" <degibson@xxxxxxxx> 写道：
>     >     >
>     >     >     Often, a memory stall time is not known at request-time. In this
>     >     >     case, Ruby stalls Simics for a long long long time, but un-stalls
>     >     >     it when Ruby determines its coherence actions have been completed.
>     >     >
>     >     >     Regards,
>     >     >     Dan
>     >     >
>     >     >     pathscale wrote:
>     >     >>     Hi,
>     >     >>     I'm studying ruby's core and I'm curious about how a memory
>     >     >>     transaction can be returned with stall time like this:
>     >     >>     { Miss , SIMICS_STALL_TIME},
>     >     >>     which is to say an infinite stall time.
>     >     >>     I don't know in what condition this is supposed to happen.
>     >     >>     Thanks
>     >     >>
>     >     >>
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