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Pau Espin Pedrol gerrit-no-reply at lists.osmocom.orgHello Jenkins Builder, I'd like you to reexamine a change. Please visit https://gerrit.osmocom.org/9513 to look at the new patch set (#2). Change subject: bts_agch_enqueue: Decrease queue len hard_limit from 1000 to 100 ...................................................................... bts_agch_enqueue: Decrease queue len hard_limit from 1000 to 100 In a prod setup, complete channel saturation at the bsc was detected, and Immediate Assignments were not being answered by the MS once sent by the BTS. Further investigation showed that the BTS was all the time printing messages like this: "bts.c:540 AGCH: too many messages in queue, refusing message type 0x3f, length = 1001/10" So it seems the AGCH queue was becoming incredibly full (1000, hard limit triggered the log), while acgch_queue.max_length was set to 10. As a result, most probably the Immediate Assignments being sent to the MS are super old in time, and the MS doesn't known about them anymore once they are receivied, so no answer is sent back. Let's try to avoid that by decreasing the hard limit so we never reach that big queue_len scenario. The number 100 is selected from data gatherered in agch_test.c which prints a table of max_length values based on different setups. Some values can reach around 80 messages, so let's use a slightly bigger hard limit. Related: SYS#2695 Change-Id: I272798c959abec123776d2fa8dad5685ec512fbd --- M src/common/bts.c M tests/agch/agch_test.ok 2 files changed, 3 insertions(+), 3 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/13/9513/2 -- To view, visit https://gerrit.osmocom.org/9513 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-MessageType: newpatchset Gerrit-Change-Id: I272798c959abec123776d2fa8dad5685ec512fbd Gerrit-Change-Number: 9513 Gerrit-PatchSet: 2 Gerrit-Owner: Pau Espin Pedrol <pespin at sysmocom.de> Gerrit-Reviewer: Jenkins Builder -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20180608/e2250d27/attachment.htm>