http://openib.org/bugzilla/show_bug.cgi?id=229
Summary: heavy CPU load can starve ib_mad thread on latest
processors
Product: OpenFabrics Linux
Version: 1.1rc3
Platform: All
OS/Version: RHEL 4
Status: NEW
Severity: normal
Priority: P3
Component: IB Core
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
RHEL4 U3 x86_64
We have a proprietary test tool that places a very heavy CPU load on system.
When this test is run on an IB host on Intel Woodcrest, AMD Opteron (Rev F, I
believe, not sure about Rev G), and PowerPC JS21 systems, IB port goes from
ACTIVE to INIT state. The workaround is to renice the ib_mad thread to highest
priority, we recommend changing the OpenIB code to do this when ib_mad thread
is created.
This does not seem to happen on older Intel or AMD processors, dunno about
PowerPC.
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