Re: [Gems-users] Stall time

[pathscale@xxxxxxx]

 

 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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