[tor-bugs] #22798 [Core Tor/Tor]: Windows relay is several times slower than Linux relay

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#22798: Windows relay is several times slower than Linux relay
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 Reporter:  Vort                           |          Owner:
     Type:  defect                         |         Status:  new
 Priority:  Medium                         |      Milestone:  Tor:
                                           |  unspecified
Component:  Core Tor/Tor                   |        Version:  Tor: 0.2.9.11
 Severity:  Normal                         |     Resolution:
 Keywords:  tor-relay performance windows  |  Actual Points:
Parent ID:                                 |         Points:  5
 Reviewer:                                 |        Sponsor:
-------------------------------------------+-------------------------------

Comment (by Vort):

 > Interesting, is it really need 2M for send buffer to reach 1M/s with
 your test link?

 Maybe this depends on how WANem limiting is implemented?

 > Maybe to set SNDBUF values to v/2 and to watch values again?

 Results are strange:
 {{{
 bw = 60 KiB/s, buf = 65536
 bw = 233 KiB/s, buf = 131072
 bw = 441 KiB/s, buf = 262144
 bw = 874 KiB/s, buf = 524288
 bw = 1257 KiB/s, buf = 1048576
 bw = 1437 KiB/s, buf = 2097152
 bw = 1693 KiB/s, buf = 4194304
 bw = 2199 KiB/s, buf = 4194304
 bw = 113 KiB/s, buf = 4194304
 bw = 2 KiB/s, buf = 4194304
 bw = 1900 KiB/s, buf = 4194304
 bw = 1185 KiB/s, buf = 4194304
 bw = 1190 KiB/s, buf = 4194304
 bw = 1189 KiB/s, buf = 4194304
 bw = 1194 KiB/s, buf = 4194304
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22798#comment:66>
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