Has anyone gotten around the 4 Meg limit on shared memory? I have a need
for about 400 Megs of data to be recorded in real-time and processed on in
user space. The memory needs to be continuous, the hardware is the
Universe II chip running in DMA mode to transfer 20 Meg/sec from the VMEbus
onto a VME Computer with 512 Megs. The user space processing will be
somewhat slow but it can't handle a copy from Kernel space to user space,
(for one reason is there is not enough memory).
For those not familiar with the Universe chip, it has its own DMA mode that
can place data into memory on the PCI bus, so this memory does not need to
be "DMAable" as defined in normal DMA transfers. It just needs to be
continuous.
******************************************
* Michael J. Wyrick *
* Director of Technology Development *
* Transmitter Location Systems, L.L.C. *
*========================================*
* E-mail: [EMAIL PROTECTED] *
* Phone: 703-227-8434 Fax: 703-968-8808 *
* PGP Key DH/DSS 0xE02104B6 *
*========================================*
* "TLS - Protecting Satellite Assets" *
* A subsidiary of Interferometrics, Inc. *
******************************************
--- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
----
For more information on Real-Time Linux see:
http://www.rtlinux.org/~rtlinux/
