laforge has posted comments on this change. (
https://gerrit.osmocom.org/c/osmo-bsc/+/27081 )
Change subject: stats: new trackers for lchan life duration
......................................................................
Patch Set 22:
(1 comment)
Patchset:
PS22:
So due to severe performance regressions, I think we will have to re-open the discussion
about this code.
It adds one osmo_timer for each lchan, and that timer expires every 100ms. So thinking of
a system with 80 BTS and each BTS having a single trx with ~ 16 lchan, we end up with
12800 (!) timers expiring each second! This is certainly the single biggest performance
hog in osmo-bsc for any setup larger than the most trivial one.
Whatever we do, we have to do better than that. Like one timer expiring every 100ms
iteratinng over the lchans?
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Gerrit-Project: osmo-bsc
Gerrit-Branch: master
Gerrit-Change-Id: I1b0670c47cb5e0b7776eda89d1e71545ba0e3347
Gerrit-Change-Number: 27081
Gerrit-PatchSet: 22
Gerrit-Owner: iedemam <michael(a)kapsulate.com>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <laforge(a)osmocom.org>
Gerrit-Reviewer: neels <nhofmeyr(a)sysmocom.de>
Gerrit-Reviewer: pespin <pespin(a)sysmocom.de>
Gerrit-Comment-Date: Wed, 11 May 2022 16:39:27 +0000
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