Date: Thu, 30 Nov 2017 17:22:46 -0500 From: Joe Buehler <aspam@cox.net> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: netmap / LINUX realtime / ixgbevf: huge RX latencies Message-ID: <5A2084B6.80302@cox.net> In-Reply-To: <5A206FB9.3010106@cox.net> References: <5A206FB9.3010106@cox.net>
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Here is what I start seeing in dmesg when I attempt to use the 4.2.1 ixgbevf driver as modified for netmap. Joe Buehler [ 136.607019] 343.712201 [ 189] ixgbe_netmap_configure_srrctl not supported [ 136.610020] 343.715203 [ 189] ixgbe_netmap_configure_srrctl not supported [ 136.796698] ixgbevf 0000:00:08.0: NIC Link is Up 10 Gbps [ 136.953013] 344.058196 [ 189] ixgbe_netmap_configure_srrctl not supported [ 136.955014] 344.060198 [ 189] ixgbe_netmap_configure_srrctl not supported [ 136.997559] ixgbevf 0000:00:08.0: NIC Link is Up 10 Gbps [ 136.997908] 344.103090 [1653] nm_rxsync_prologue eth0 RX0: fail 'head < kring->nr_hwcur || head > kring->nr_hwtail' h 1 c 1 t 0 rh 1 rc 1 rt 0 hc 0 ht 0 [ 136.999652] 344.104836 [1698] netmap_ring_reinit called for eth0 RX0 [ 137.000568] 344.105751 [1653] nm_rxsync_prologue eth0 RX0: fail 'head < kring->nr_hwcur || head > kring->nr_hwtail' h 1 c 1 t 0 rh 1 rc 1 rt 0 hc 0 ht 0 [ 137.002268] 344.107452 [1698] netmap_ring_reinit called for eth0 RX0 [ 137.003165] 344.108349 [1653] nm_rxsync_prologue eth0 RX0: fail 'head < kring->nr_hwcur || head > kring->nr_hwtail' h 1 c 1 t 0 rh 1 rc 1 rt 0 hc 0 ht 0 [ 137.004856] 344.110041 [1698] netmap_ring_reinit called for eth0 RX0 [ 137.005752] 344.110936 [1653] nm_rxsync_prologue eth0 RX0: fail 'head < kring->nr_hwcur || head > kring->nr_hwtail' h 1 c 1 t 0 rh 1 rc 1 rt 0 hc 0 ht 0 [ 137.007451] 344.112635 [1698] netmap_ring_reinit called for eth0 RX0 [ 137.008343] 344.113527 [1653] nm_rxsync_prologue eth0 RX0: fail 'head < kring->nr_hwcur || head > kring->nr_hwtail' h 1 c 1 t 0 rh 1 rc 1 rt 0 hc 0 ht 0 [ 137.010066] 344.115250 [1698] netmap_ring_reinit called for eth0 RX0 [ 137.010953] 344.116137 [1698] netmap_ring_reinit called for eth0 RX0
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