Submission + - Mark Russinovich about Vista network slowdown 1
koro666 writes: In his latest blog post, Mark Russinovich analyzes the network slowdown experienced by some users when playing multimedia content. "Tests of MMCSS during Vista development showed that [...] heavy network traffic can cause enough long-running DPCs to prevent playback threads from keeping up with their media streaming requirements, resulting in glitching. MMCSS' glitch-resistant mechanisms were therefore extended to include throttling of network activity. It does so by issuing a command to the NDIS device driver [...] [to] pass along, at most 10 packets per millisecond (10,000 packets per second)."
with ethernet's 1500 byte max ... BS rate. (Score:2)
1,500 bytes [purdue.edu] x 10,000 packets/second = 15MB/second. That's clearly more than people were seeing, so this is not a complete answer.