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2ethbw(X)                     EFSFFCLIRG (Man Page)                    ethbw(X)
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NAME

7       ethbw
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11       ethbw   gathers   RDMA   data   movement  statistics  via  counters  in
12       /sys/class/infiniband. The delta in counter values  over  the  interval
13       (default  of  1 second), results in the average bandwidth for the given
14       interval. Both transmit (xmt) and receive (rcv) bandwidth is monitored.
15       ethbw  also monitors Intel NICs for any RDMA retransmit or input packet
16       discards, in which case, the xmt or rcv respectively, is shown as red.
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18       The following cases may present the need to improve PFC tuning:
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21       1)  Retransmits can represent packet loss or corruption in the  network
22           and  may  indicate  opportunities to improve PFC tuning or high bit
23           error rates (BER) on some cables or devices.
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26       2)  Input packet discards indicate packets the NIC itself dropped  upon
27           receipt. This can represent opportunities to improve PFC tuning but
28           can also be normal for some environments. Retransmits at the remote
29           NICs which are communicating with this NIC are a stronger indicator
30           of PFC or BER causes for packet loss.
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Syntax

34       ethbw [-i  seconds] [-d  seconds] [ nic ... ]
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Options

37       --help
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39                 Produces full help text.
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42       -i/--interval seconds
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44                 Interval at which bandwidth will be shown. Values of 1-60 al‐
45                 lowed. Defaults to 1.
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48       -d/--duration seconds
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50                 Duration to monitor for. Default is 'infinite'.
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53       nic
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55                 Where  each nic specified is an RDMA NIC name. If no NICs are
56                 specified, all RDMA NICs will be monitored.
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Examples

60       ethbw
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62       ethbw irdma1 irdma3
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64       ethbw -i 2 -d 300 irdma1 irdma3
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68Copyright(C) 2020-2022         Intel Corporation                      ethbw(X)
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