Convert if_afdata read lock path to epoch
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Authored by mmacy on May 13 2018, 5:13 AM.

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ae
jeff
gallatin
shurd
sbruno
olivier
melifaro

Summary

Convert write lock to mutex
Convert read lock to epoch
Do destroy / free of llentrys after grace period has elapsed

For the impact see flame graph 4 -> 5 at:
https://github.com/ScaleBSD/scalebsd.github.io/blob/master/_drafts/2018-05-12-UDP-On-FreeBSD-is-anyone-using-this-at-scale.md

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rS FreeBSD src repository - subversion

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mmacy created this revision.May 13 2018, 5:13 AM

Herald added a subscriber: imp. · View Herald TranscriptMay 13 2018, 5:13 AM

ae added reviewers: olivier, melifaro.May 14 2018, 3:06 PM

mmacy abandoned this revision.May 18 2018, 9:49 PM

mmacy mentioned this in D15409: Protect global ifnet list and short lived ifaddr references with epoch.

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Path

Size

sys/

net/

if_llatbl.h

2 lines

if_llatbl.c

16 lines

if_var.h

24 lines

netinet/

in.c

10 lines

netinet6/

in6.c

10 lines

Diff 42468

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sys/net/if_llatbl.h

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sys/net/if_llatbl.c

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sys/net/if_var.h

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sys/netinet/in.c

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Convert if_afdata read lock path to epochAbandonedPublicActions

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Revision ContentsChangeset List

Diff 42468

sys/net/if_llatbl.h

sys/net/if_llatbl.c

sys/net/if_var.h

sys/netinet/in.c

sys/netinet6/in6.c

Convert if_afdata read lock path to epoch
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Revision Contents
Changeset List