BBlack has submitted this change and it was merged.
Change subject: r::c::perf: disable prequeue timestamps
......................................................................
r::c::perf: disable prequeue timestamps
Change-Id: Id6e243c42b1d503febe86ee4dc142796ea758fe9
---
M modules/role/manifests/cache/perf.pp
1 file changed, 6 insertions(+), 0 deletions(-)
Approvals:
BBlack: Verified; Looks good to me, approved
diff --git a/modules/role/manifests/cache/perf.pp
b/modules/role/manifests/cache/perf.pp
index 4599ce9..1604c6d 100644
--- a/modules/role/manifests/cache/perf.pp
+++ b/modules/role/manifests/cache/perf.pp
@@ -93,6 +93,12 @@
# will see drops in col 2 of /proc/net/softnet_stat
'net.core.netdev_max_backlog' => 60000,
+ # Default:1 - setting this to zero defers timestamping until after
+ # RPS. It's more efficient this way, but timestamp doesn't account
+ # for any tiny delays in queueing before RPS, which I don't think
is
+ # an issue in our case.
+ 'net.core.netdev_tstamp_prequeue' => 0,
+
# Our rate of incoming SYN on heaviest cp hosts peaks around
# 1-2K/sec. For somaxconn, the SYN numbers should be multiplied
# out for a few seconds of headroom (bursts, and userspace delays)
--
To view, visit https://gerrit.wikimedia.org/r/295542
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Gerrit-MessageType: merged
Gerrit-Change-Id: Id6e243c42b1d503febe86ee4dc142796ea758fe9
Gerrit-PatchSet: 3
Gerrit-Project: operations/puppet
Gerrit-Branch: production
Gerrit-Owner: BBlack <[email protected]>
Gerrit-Reviewer: BBlack <[email protected]>
Gerrit-Reviewer: Ema <[email protected]>
Gerrit-Reviewer: jenkins-bot <>
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