From f1f746dddcc0eb97c04b7d4a521962edb30cbea8 Mon Sep 17 00:00:00 2001 From: Nayana Bidari Date: Wed, 21 Jul 2021 18:03:48 -0700 Subject: Add metric to count number of segments acknowledged by DSACK. - Creates new metric "/tcp/segments_acked_with_dsack" to count the number of segments acked with DSACK. - Added check to verify the metric is getting incremented when a DSACK is sent in the unit tests. PiperOrigin-RevId: 386135949 --- pkg/sentry/socket/netstack/netstack.go | 1 + 1 file changed, 1 insertion(+) (limited to 'pkg/sentry/socket/netstack/netstack.go') diff --git a/pkg/sentry/socket/netstack/netstack.go b/pkg/sentry/socket/netstack/netstack.go index 0f8cbe7e2..9b844b0c0 100644 --- a/pkg/sentry/socket/netstack/netstack.go +++ b/pkg/sentry/socket/netstack/netstack.go @@ -274,6 +274,7 @@ var Metrics = tcpip.Stats{ Timeouts: mustCreateMetric("/netstack/tcp/timeouts", "Number of times RTO expired."), ChecksumErrors: mustCreateMetric("/netstack/tcp/checksum_errors", "Number of segments dropped due to bad checksums."), FailedPortReservations: mustCreateMetric("/netstack/tcp/failed_port_reservations", "Number of time TCP failed to reserve a port."), + SegmentsAckedWithDSACK: mustCreateMetric("/netstack/tcp/segments_acked_with_dsack", "Number of segments for which DSACK was received."), }, UDP: tcpip.UDPStats{ PacketsReceived: mustCreateMetric("/netstack/udp/packets_received", "Number of UDP datagrams received via HandlePacket."), -- cgit v1.2.3