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Make FX2 bus arbiter prevent starvation #44

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whitequark opened this issue May 13, 2018 · 2 comments
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Make FX2 bus arbiter prevent starvation #44

whitequark opened this issue May 13, 2018 · 2 comments
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Use a leaky bucket algorithm to limit per-FIFO bursts to 16 bytes (or a configurable value).
@whitequark whitequark added this to the Preview 1 milestone May 13, 2018
@whitequark whitequark added the gateware Component: gateware label May 13, 2018
@whitequark whitequark self-assigned this May 13, 2018
whitequark added a commit that referenced this issue Oct 8, 2018
@whitequark
applet.benchmark: new applet.
b088d73 
Fixes #47.

Not exactly functional due to #44 and #64.

benchmark: running benchmark mode source for 4.000 MiB
benchmark: mode source: 4.136 MiB/s
(hangs. after restart:)
benchmark: running benchmark mode sink for 4.000 MiB
benchmark: mode sink: 1.394 MiB/s
(hangs. after restart:)
benchmark: running benchmark mode loopback for 4.000 MiB
(hangs)
@whitequark whitequark mentioned this issue Nov 22, 2018
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@whitequark whitequark mentioned this issue Dec 5, 2018
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@whitequark
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Actually, the FX2 arbiter does not cause starvation. It only looked like it did because of a deadlock in the host code, which was fixed in e59730f.

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Though, that being said, the arbiter is not particularly fair, but it seems pretty much sufficient for now.

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