[Bug 254884] [if_smsc] Add ability to disable "turbo_mode" (RX frames batching) similar to linux driver

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254884

--- Comment #3 from Oleg Sidorkin <osidorkin at gmail.com> ---
(In reply to Hans Petter Selasky from comment #1)

No :)

(In reply to Hans Petter Selasky from comment #2)

Iperf3:
Turbo off:
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.01   sec  1.80 MBytes  14.9 Mbits/sec   22   60.8 KBytes
[  5]   1.01-2.00   sec  4.27 MBytes  36.3 Mbits/sec   50   21.3 KBytes
[  5]   2.00-3.00   sec  4.31 MBytes  36.2 Mbits/sec   43   19.8 KBytes
[  5]   3.00-4.00   sec  2.36 MBytes  19.8 Mbits/sec   37   60.8 KBytes
[  5]   4.00-5.00   sec  1.44 MBytes  12.1 Mbits/sec   40   2.84 KBytes
[  5]   5.00-6.01   sec  1.91 MBytes  15.9 Mbits/sec   42   48.1 KBytes
[  5]   6.01-7.00   sec  3.08 MBytes  26.0 Mbits/sec   48   14.1 KBytes
[  5]   7.00-8.01   sec  3.59 MBytes  29.9 Mbits/sec   43   60.8 KBytes
[  5]   8.01-9.00   sec  2.62 MBytes  22.1 Mbits/sec   45   18.4 KBytes
[  5]   9.00-10.00  sec  1.89 MBytes  15.9 Mbits/sec   43   1.41 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  27.3 MBytes  22.9 Mbits/sec  413             sender
[  5]   0.00-10.00  sec  27.2 MBytes  22.8 Mbits/sec                  receiver


Turbo on:
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  7.27 MBytes  61.0 Mbits/sec   34   31.2 KBytes
[  5]   1.00-2.00   sec  7.54 MBytes  63.2 Mbits/sec   33   36.9 KBytes
[  5]   2.00-3.00   sec  7.53 MBytes  63.2 Mbits/sec   36   21.2 KBytes
[  5]   3.00-4.00   sec  7.57 MBytes  63.5 Mbits/sec   33   26.9 KBytes
[  5]   4.00-5.00   sec  7.49 MBytes  62.9 Mbits/sec   34   35.5 KBytes
[  5]   5.00-6.00   sec  7.48 MBytes  62.8 Mbits/sec   33   36.9 KBytes
[  5]   6.00-7.00   sec  7.46 MBytes  62.6 Mbits/sec   36   5.66 KBytes
[  5]   7.00-8.00   sec  7.56 MBytes  63.4 Mbits/sec   35   25.5 KBytes
[  5]   8.00-9.00   sec  7.53 MBytes  63.1 Mbits/sec   34   32.6 KBytes
[  5]   9.00-10.00  sec  7.44 MBytes  62.4 Mbits/sec   35   36.9 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  74.9 MBytes  62.8 Mbits/sec  343             sender
[  5]   0.00-10.01  sec  74.8 MBytes  62.7 Mbits/sec                  receiver

Ping:
Turbo off:
21 packets transmitted, 21 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.344/0.432/0.558/0.057 ms

Turbo on:
21 packets transmitted, 21 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.425/0.581/0.676/0.085 ms

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