| Title: | VAX and Alpha VMS |
| Notice: | This is a new VMSnotes, please read note 2.1 |
| Moderator: | VAXAXP::BERNARDO |
| Created: | Wed Jan 22 1997 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 703 |
| Total number of notes: | 3722 |
The $LCKPAG system service returns the virtual address range
that was locked into the working set if the function was successful.
Is there a system service available that would convert the virtual
address of each page that was locked to it's physical address?
As I recall, this can be done readily via SDA. However, an
enhancement to a currently existing memory test program has been re-
quested to obtain the physical addresses, in order to map the working
set to the SIMMs. (There are a number of address/data translations
that must be performed to successfully do this. From the program-
ming perspective, obtaining the physical addresses of the pages
locked into the process' working set is one that seems viable to
add to the test program.) Any suggestions would be appreciated.
Greg
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 550.1 | COMEUP::SIMMONDS | loose canon | Tue Apr 29 1997 23:53 | 10 | |
Re: .0
Assuming you're talking Alpha, how about mmg$pteref() and then
ioc$svapte_to_pa() ? ('device driver' or similar context required
for these, because of Spinlocks, etc.)
I haven't seen a supported system service which would do all this for
you..
John.
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| 550.2 | EVMS::KUEHNEL | Andy K�hnel | Wed Apr 30 1997 10:17 | 4 | |
Since the page is already locked in memory and in your working set,
you can simply use the pte_va macro from VMS_MACROS.H to get the
address of the PTE mapping the address. The high order longword of the
PTE contains the PFN.
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| 550.3 | Danke schon | GREGOR::OPP | Wed Apr 30 1997 13:59 | 6 | |
RE: .1 & .2
Thank you for the suggestions. I'll check them out.
GLO
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