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neels gerrit-no-reply at lists.osmocom.orgHello Jenkins Builder, I'd like you to reexamine a change. Please visit https://gerrit.osmocom.org/c/osmo-bsc/+/22085 to look at the new patch set (#4). Change subject: hodec2: to balance congestion, use overload percent ...................................................................... hodec2: to balance congestion, use overload percent For balancing load across congested cells and across congested TCH/* kinds, instead of comparing the number of lchans above the configured congestion threshold, compare the percent of lchans of overload. In short, using a percentage prevents cells with less min-free-slots to fill up 100% while neighbor cells still may have several free lchans available. An obvious example of why this is desirable is illustrated by test_balance_congestion_by_percentage.ho_vty: Cell A has min-free-slots 2, and has all slots occupied. Cell B has min-free-slots 4, and has 2 slots remaining free. If we count congested lchans as in current master: cell A has a congestion count of 2: two more lchans in use than "allowed". If we move one lchan over to cell B, it ends up with a congestion count of 3, which is worse than 2. So when counting lchans, we decide that cell A should remain full. Instead, when comparing percentage of remaining lchans, we would see that cell A is loaded 100% above congestion (2 of 2 remaining lchans in use), but when moving one lchan to cell B, that would only be 75% loaded above its treshold (3 of 4 remaining lchans in use). So a percentage comparison would cause a handover to cell B. Related: SYS#5259 Change-Id: I55234c6c99eb02ceee52be0d7388bea14304930f --- M src/osmo-bsc/handover_decision_2.c M tests/handover/test_balance_congestion_by_percentage.ho_vty M tests/handover/test_balance_congestion_tchf_tchh.ho_vty 3 files changed, 52 insertions(+), 20 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/85/22085/4 -- To view, visit https://gerrit.osmocom.org/c/osmo-bsc/+/22085 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bsc Gerrit-Branch: master Gerrit-Change-Id: I55234c6c99eb02ceee52be0d7388bea14304930f Gerrit-Change-Number: 22085 Gerrit-PatchSet: 4 Gerrit-Owner: neels <nhofmeyr at sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-CC: pespin <pespin at sysmocom.de> Gerrit-MessageType: newpatchset -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20210111/89228aaa/attachment.htm>