[asterisk-dev] Kernel modules => mainline kernel

[Paul Cadach]

Kevin P. Fleming wrote:
[skipped]
> F) broken math - This example (for 4 quad T1/E1 cards in E1 mode) was
> offered:
>
> So 4 Quad-PRI cards with this driver will generate 4000 interrupts/sec.
>   Let's compare the data volume:
>     8bytes * 30channels * 4ports * 2[R/W] * 1000/sec <= 2Kb/sec of PCM.

To be clear, for one quad PRI card data transfer rate will be
8 bytes * 31 (!) channels * 4 ports * 2[R/W] * 1000/sec = 1924000 bytes per 
second (or 1924 bytes per interrupt)

for 4 quad-PRI cards data rate will be 4 times more: 7936000 bytes per 
second.

(all values without PCI overhead, talks to framer, FPGA, etc.). Combining of 
interrupts will not combine DMA transfers.

Usage of some sort of high-speed TDM bus (H.100/H.110, for example, 1024 
PCMs) can aggregate interrupts _and DMA transfers_.


[skipped]


WBR,
Paul.