OpenSolaris

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Bug ID 6644935
Synopsis mblk cred_t reference counting limits scalability
State 10-Fix Delivered (Fix available in build)
Category:Subcategory kernel:tcp-ip
Keywords batoka-perf | net-blitz-2009.1 | opl-io-cards | opl-perf | pae-networking | pae-nxge | s10-netperf | sn-io-cards | spbc_s10uX
Responsible Engineer Rao Shoaib
Reported Against snv_84 , s10u5_08
Duplicate Of
Introduced In solaris_nevada
Commit to Fix snv_106
Fixed In snv_106
Release Fixed solaris_nevada(snv_106) , solaris_10u8(s10u8_03) (Bug ID:2176707)
Related Bugs 6281836 , 6586066 , 6634075 , 6666879 , 6693633 , 6765829 , 2177357
Submit Date 21-December-2007
Last Update Date 3-June-2009
Description 
Shared cred_t structures are referenced by every message sent from
a process and atomic refcounting them imposes a scalability limit
on the amount of network IO of a multithreaded process.

Additionally, processes generally inherit the cred_t of their parent,
so scalability problems can occur also with multi-process workloads.
However this issue is easier to workaround.
Work Around 
N/A
Comments 
N/A