Attention is currently required from: iedemam, neels, pespin. laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-bsc/+/28165 ) Change subject: stats: new trackers for lchan life duration (v2) ...................................................................... Patch Set 1: (1 comment) Patchset: PS1:

Hi all, […] did you do some testing / profiling under load comparing old vs. new approach? The poll / syscall load for sure is no longer a concern. If you're worried that doing everything in one timer for all the BTSs of a BSC, it might be interesting to do some probing how long it takes between function entry and function exit of the new per-second timer function.

Something like the followign bpftrace snippet would print you a histogram of the duration between entry and exit of the function (update interval every 10s): --- /* time spent in bsc_store_bts_lchan_duration */ uprobe:/usr/local/bin/osmo-bsc:bsc_store_bts_lchan_durations { @timer_start = nsecs; } uretprobe:/usr/local/bin/osmo-bsc:bsc_store_bts_lchan_durations { $duration = (nsecs - @timer_start)/1000000; @bsc_store_bts_lchan_duration= hist($duration); } /* report every 10s */ interval:s:10 { printf("========================================================== "); time("%Y-%m-%d %H:%M:%S\n"); print(@bsc_store_bts_lchan_duration); } --- (untested, as I don't have a osmo-bsc with that new function/symbol). -- To view, visit https://gerrit.osmocom.org/c/osmo-bsc/+/28165 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bsc Gerrit-Branch: master Gerrit-Change-Id: Ie3771233ecbd4bc24a24fb22c1064a18e7b8b2b0 Gerrit-Change-Number: 28165 Gerrit-PatchSet: 1 Gerrit-Owner: iedemam <michael@kapsulate.com> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: neels <nhofmeyr@sysmocom.de> Gerrit-Reviewer: pespin <pespin@sysmocom.de> Gerrit-CC: laforge <laforge@osmocom.org> Gerrit-Attention: iedemam <michael@kapsulate.com> Gerrit-Attention: neels <nhofmeyr@sysmocom.de> Gerrit-Attention: pespin <pespin@sysmocom.de> Gerrit-Comment-Date: Thu, 19 May 2022 19:44:11 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: iedemam <michael@kapsulate.com> Gerrit-MessageType: comment