Date: Fri, 19 Oct 2018 17:12:16 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 232451] [igb] I210 NIC can not send more than ~670Mbit/s with flow control enabled. Message-ID: <bug-232451-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D232451 Bug ID: 232451 Summary: [igb] I210 NIC can not send more than ~670Mbit/s with flow control enabled. Product: Base System Version: 11.2-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: lev@FreeBSD.org I have server which is equipped with I210 NIC and has 11.2-STABLE installed. With default config and MTU 9000 this server can not send faster than ~670Mbit/s on network without any other load (tested with iperf3). If I set "sysctl dev.igb.0.fc" to 0, it easily sends 990-995Mbit/s at same network to same client. Other problem is, that after mtu change with "ifconfig igb mtu ..." speed d= rops again, but "sysctl dev.igb.0.fc" is 0 still. To turn off flow control again= it is needed to flip "sysctl dev.igb.0.fc" to non-zero and to zero again. --=20 You are receiving this mail because: You are the assignee for the bug.=
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