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Previously, lockstat(1) would use a lock's address as its identifier when
consuming data describing lock contention and hold events. After collecting
the requested data, it would use ksyms(4) to resolve lock addresses to
names. Of course, this doesn't work too well for locks contained in
dynamically-allocated memory. This change modifies lockstat(1) to trace the
lock names obtained from the base struct lock_object instead, leading to
output that is generally much more useful.
This change also removes the -c option, which is used to coalesce data for
locks in an array. It's not possible to support this option without also
tracing lock addresses, and since lock arrays in which the lock names are
distinct are not very common in FreeBSD, it's simpler to just remove the
option.
Reviewed by: avg (earlier revision)
Differential Revision: https://reviews.freebsd.org/D3661
Notes:
svn path=/head/; revision=288417
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MFC after: 3 days
Notes:
svn path=/head/; revision=283508
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used or implemented on FreeBSD.
Reported by: kmacy
Reviewed by: kmacy, rpaulo
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
Notes:
svn path=/head/; revision=272834
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installed. Additionally, remove Solaris-specific sections and references,
and replace example outputs with output from lockstat on FreeBSD, since
lockstat's output contains stack traces.
This change also removes some examples that don't seem to work properly on
FreeBSD. The examples should be re-added when lockstat is fixed.
Reported by: avg
MFC after: 1 week
Notes:
svn path=/head/; revision=257212
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the lockstat provider, and the ksyms(4) pseudo driver kernel modules.
Approved by: gnn (mentor)
Notes:
svn path=/head/; revision=192867
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