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0 pointsbbrazil9y ago0 comments

By default you can only get that per-kernel from /proc/net/netsnmp. BPF may allow something more granular.

The other way of approaching it is to look for the additional latency it causes, which you can spot on a per-service basis.

0 comments

saravana879y ago

Additional latency could be an indicator, but there's no guarantee that it is because of retransmissions ?

bbrazilOP9y ago

If you look at your latency histogram and are seeing a bump at around 200ms above normal (which was the default minimum wait time a few years back anyway), it's probably retransmits.

saravana879y ago

Got it.

j / k navigate · click thread line to collapse

0 pointsbbrazil9y ago0 comments

By default you can only get that per-kernel from /proc/net/netsnmp. BPF may allow something more granular.

The other way of approaching it is to look for the additional latency it causes, which you can spot on a per-service basis.

0 comments

saravana879y ago

Additional latency could be an indicator, but there's no guarantee that it is because of retransmissions ?

bbrazilOP9y ago

If you look at your latency histogram and are seeing a bump at around 200ms above normal (which was the default minimum wait time a few years back anyway), it's probably retransmits.

saravana879y ago

Got it.

j / k navigate · click thread line to collapse