Ticket #38 (assigned enhancement)

Opened 14 years ago

Last modified 14 years ago

Writing from 64 CNs is slow with ZOID

Reported by: iskra Owned by: iskra
Priority: major Milestone: V1R4 Release
Component: ZeptoOS Version:
Keywords: Cc:

Description

ZOID daemon seems to have a scalability problem. Writing is fastest with just one CN, and then it starts slowing down, particularly for 32 and 64 CNs. A workaround is to enable acknowledgements, so this could be a TLB thrashing problem. However, IBM's CIOD does not use ACKs and does not seem to suffer from this problem.

We should try writing replies from another core than the one that receives data to see if that helps with anything.

Change History

comment:1 Changed 14 years ago by iskra

  • Status changed from new to assigned

comment:2 Changed 14 years ago by iskra

  • Type changed from defect to enhancement

comment:3 Changed 14 years ago by kazutomo

  • Milestone set to V1R4 Release
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