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Add some accounting to the per-domain full bucket caches.
AbandonedPublic

Authored by markj on Aug 10 2018, 8:42 PM.

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Summary

Keep track of the number of items in each cache and use the existing UMA
callout to maintain a working set size estimate for each cache. The WSS
estimate is currently unused, but my aim is to use it to make
uma_reclaim() less aggressive in the common case.

The item count (uzd_nitems) has a couple of applications; it will be
useful in D7538, and could also be used to restrict the bucket cache
size of certain zones. In particular, it would be useful for the
vm_page.c page cache zones, which are currently configured with
UMA_ZONE_NOBUCKETCACHE.

Diff Detail

Lint
Lint OK
Unit
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Build Status
Buildable 18709
Build 18390: arc lint + arc unit

Event Timeline

markj created this revision.Aug 10 2018, 8:42 PM
markj abandoned this revision.Aug 10 2018, 8:43 PM