Hi Sasha,
Sasha Khapyorsky wrote:
Hi Yevgeny,
On 11:06 Mon 24 Nov , Yevgeny Kliteynik wrote:
Sasha Khapyorsky wrote:
Use OpenSM switch lft_buf directly and save memory (48k per switch) in
local structures.
Looks good, thanks.
The only potential downside I could see here - is that this will require
some handling if we will remove new_lft field (after #1406 and other
debugging).
Right, I thought about it too, but I decided that removing new_buf
might be not so good. Right now we have two types of routing engines:
engines that are basing their decisions on the min_hop tables, and engines
that make their own decisions and creating min_hop tables as a by-product,
just for multicast routing.
The example of latter at this point is only fat-tree routing, but I'm sure
that more will follow. New routing for 3D mesh/torus comes to mind (not
necessarily the one that was already posted to the list). For this type
of routing you will need new_buf anyway, so instead of having it inside
of every routing (as it was with fat-tree before the unicast cache and lft
simplification), we'd better have one in osm_switch_t.
-- Yevgeny
Sasha
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