Re: SMC for page crossing traces

another optimization for SMC is not to installed pages that have code
translated from into the TLB with write permission. later a write will
miss the TLB and BOCHS can take a longer path to handle that (i.e.
call decWriteStamp). this will eliminate the need to call
decWriteStamp on every write.

Xin


On Thu, Oct 25, 2012 at 1:23 AM, Stanislav <[email protected]> wrote:
> Yes, it is already changes in SVN. Including few more observations that you
> didn’t see yet …
>
>
>
> Unfortunately SVN services are not available right now for Bochs. Might be
> you could look on latest SVN snapshot that Volker put on the Bochs webpage.
>
>
>
> Stanislav
>
>
>
> From: Xin Tong [mailto:[email protected]]
> Sent: Thursday, October 25, 2012 1:01 AM
> To: [email protected]
> Subject: [Bochs-developers] SMC for page crossing traces
>
>
>
> I am reading this code and wondering why the entry is not invalidated when
> the second part of the trace is written into.
>
>
>
>  if (mask & 0x1) {
>
>     // the store touched 1st cache line in the page, check for
>
>     // page split traces to invalidate.
>
>     for (i=0;i<BX_ICACHE_PAGE_SPLIT_ENTRIES;i++) {
>
>       if (pAddr == pageSplitIndex[i].ppf) {
>
>         pageSplitIndex[i].ppf = BX_ICACHE_INVALID_PHY_ADDRESS;
>
>         // SHOULD pageSplitIndex[i].e BE INVALIDATED HERE?
>
>       }
>
>     }
>
>   }
>
>
>
> Xin
>
>

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