Branch: refs/heads/scale Home: https://github.com/kronosnet/kronosnet Commit: 875cfc2cbf7cc2ee373e47ba8adf1088694b28cc https://github.com/kronosnet/kronosnet/commit/875cfc2cbf7cc2ee373e47ba8adf10... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/links.c
Log Message: ----------- [stats] report correct MTU for loopback links
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Commit: 32c1634103584ff22d2b5b7a50275c76248eeada https://github.com/kronosnet/kronosnet/commit/32c1634103584ff22d2b5b7a50275c... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/handle.c M libknet/internals.h M libknet/threads_pmtud.c M libknet/transport_udp.c
Log Message: ----------- [PMTUd] Use kernel MTU information to determine next packet size during discovery
Using this information we can, for good links (*), determine and verify the link MTU with 2 packets.
* good links means: node X has MTU Y configured on a given interface. Any network object between node X and destination is capable of handling MTU >= Y. In no case the kernel will allow us to send packets > Y.
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Commit: 0f9ebd028508149af3bf5e30906ba764d084a880 https://github.com/kronosnet/kronosnet/commit/0f9ebd028508149af3bf5e30906ba7... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/links.c
Log Message: ----------- [PTMUd] by using a safe PMTU to init a link, we can shave down corosync membership creation by 25%
tested on a 9 node cluster with 2 links each node, going down from 4 seconds to 3 seconds
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Commit: 08c9be51577a4e4a9cca65c49e2a89239119b8f8 https://github.com/kronosnet/kronosnet/commit/08c9be51577a4e4a9cca65c49e2a89... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/internals.h M libknet/threads_common.c M libknet/threads_pmtud.c
Log Message: ----------- [PMTUd] rename pmtud_running to pmtud_waiting
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Commit: ccc2e694fa9c5312df9729ff432f2b37d385f7da https://github.com/kronosnet/kronosnet/commit/ccc2e694fa9c5312df9729ff432f2b... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/internals.h M libknet/tests/knet_bench.c M libknet/threads_pmtud.c M libknet/transport_udp.c
Log Message: ----------- [PTMUd] if any threads receives a EMSGSIZE outside of a PMTUD run, force PTMUd to run
Scenario:
node X has MTU Y on the interface and application is sending packets with size >= Y.
The interface MTU is suddenly reduced to < Y
Before this change, the kernel would be dropping packets till the next PMTUd run.
After this change, the PMTUd will be informed that it has to rerun (overriding the pmtud_interval), reducing the packet drop to a minimum.
How to test:
force knet_bench to send 1500 size packets with ping_data (requires code change) and start it.
reduce MTU on the interface from 1500 to 1300 (for example)
Notice an immediate trigger of PMTUd run in debug mode
Note: going up, from 1300 to 1500 will wait for the next PMTUd re-run as there is no immediate way to detect this change unless we start listening to kernel netlink sockets with libnl3 (investigation in progress but not critical enough atm).
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Commit: 40357a9bf39cc9fb6aedb41288357dac051dd1d2 https://github.com/kronosnet/kronosnet/commit/40357a9bf39cc9fb6aedb41288357d... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/transport_udp.c
Log Message: ----------- [PMTUd] make PMTUd force_run notification more quiet
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Commit: 84773e2f777cb902015c8ca04bd61b7106b17415 https://github.com/kronosnet/kronosnet/commit/84773e2f777cb902015c8ca04bd61b... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/threads_common.c
Log Message: ----------- [PMTUd] if PMTUd is rescheduled, then enforce a new run
the usleep between each PMTUd run will give time to the other threads to grab the wrlock
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Commit: dbf441587eb98b9d37aa048eeb4a9761557eb357 https://github.com/kronosnet/kronosnet/commit/dbf441587eb98b9d37aa048eeb4a97... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/threads_pmtud.c
Log Message: ----------- [PMTUd] generate warning when there is a timeout receiving a response
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Commit: e1e86bf65213aaa9b15c9d141f0561e4d37960a7 https://github.com/kronosnet/kronosnet/commit/e1e86bf65213aaa9b15c9d141f0561... Author: Fabio M. Di Nitto fdinitto@redhat.com Date: 2018-01-02 (Tue, 02 Jan 2018)
Changed paths: M libknet/threads_pmtud.c
Log Message: ----------- [PMTUd] amend warning message
Signed-off-by: Fabio M. Di Nitto fdinitto@redhat.com
Compare: https://github.com/kronosnet/kronosnet/compare/b0ebf3b8e263...e1e86bf65213
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