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([2601:647:4700:d33::f7e]) by smtp.gmail.com with ESMTPSA id p4sm1235165pgh.14.2020.02.18.22.58.06 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Feb 2020 22:58:06 -0800 (PST) From: Alexey Ivanov X-Google-Original-From: Alexey Ivanov In-Reply-To: Autocrypt: addr=SaveTheRbtz@GMail.com; prefer-encrypt=mutual; keydata= mQINBFAu5eMBEAC7/NSzJVT1S5k9zQgGdQnMnuHC6N6xLw/L+pfiplJeWW8Orf8qlmXa3i/y xHE4k1oTEtZ4WilS+mjtnBWrtNcHs7tMKbNVI+5aOjhNXfriLG20P7+sqK83s888VW/AjvHM 0rktcGVDTVT8x2pmKVlRElmFWKkRpwXPX2BSDcr78wgJgOoY+y3LxvAsSiu/22I6yfOGvyrL fPnYc9umqggjbmA0uiE+Te6Bjxkz8WcYpE5vkZbP1pEP4EhzQu5+5A3Jy0SmiCsgxWPNpbpX 6GUyV8UIYmaBCsT3IZK02t6+SAiidPQk4wa1B9Opk7WH/OvV9Fqt+TkVVQGi5CXXfL3Kzp+7 kJs62v7kDtqmdLfXZ3u47MVMh6d+IC0GrzCPry7qh8mSU2gDZe23ac5gXtFoHxEGND4cYjsW NewnFQGaa269nb/iWgpR2SUW6bJCxdAMnRuKUbPdkhgXZlfbX79lTEjzDL96Pu6CTYSIJe7r 2cVyh62JAvj8DmWrnwqfKmyKDTCg6ADF4P9ohDyD696lFk0IQeRSJmu3YHvunoVBzOjFWm+H bq/13izhbNtGm5VN7O6u9PKhA5Ah+FWhURUp9Tr98Xx0CytKcAPSefXLyowwAchTqgqEpSY2 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list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Feb 2020 06:58:08 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --yf41p4OsM4E4v4pFvVFkki8jjhRAKSvsF Content-Type: multipart/mixed; boundary="hjJknXaWD81IRS3JCC9xoL24WGHW8qwl6" --hjJknXaWD81IRS3JCC9xoL24WGHW8qwl6 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable FWIW, we recently noticed a similar issue with our CUBIC senders after we've enabled FQ on them (4.15 kernel.) Disabling train detection in hystart did fix the problem: # echo 2 > /sys/module/tcp_cubic/parameters/hystart_detect [1] https://github.com/torvalds/linux/blob/master/net/ipv4/tcp_cubic.c#L76-L7= 7 > The receiver (as in the nginx proxy in the dumps) is actually running f= q > qdisc with BBR on kernel 4.9. Could that explain what you are seeing? >=20 > Changing it to cubic does not change the resulting throughput though, a= nd > it also was not involved at all in the Windows 10 -> linux router -> Ap= ache > server tests which also gives the same 23-ish MB/s with pacing. >=20 >=20 > On 26 January 2017 at 21:54, Eric Dumazet w= rote: >=20 >> It looks like the receiver is seriously limiting receive window in the= >> "pacing" case. >> >> Only after 30 Mbytes are transfered, it finally increases it, from >> 359168 to 1328192 >> >> DRS is not working as expected. Again maybe related to HZ value. --hjJknXaWD81IRS3JCC9xoL24WGHW8qwl6-- --yf41p4OsM4E4v4pFvVFkki8jjhRAKSvsF Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEbh9RtmwZ8GyqOc8WK9dDD4gGvZoFAl5M3H0ACgkQK9dDD4gG vZqyLw//cfUlhDCqdBCQ3H6El8ayTE6vXpUs4PB1XPijW3q8Li/ZZSbuo3Ocloz/ sn92LJCojbDS9qN1DmwEPBiUrgAnqXaYsh7WvJH+SjOSNxfTFfF8rmai7Az8Q1yg v383gkcSH97/HQY72Ii7+Wr/CESiZVOiyxnhvPBHHkPYQHHLMwfy+VGiVqNmGrlF TbEkLynxpLPypZpWMowtEqzgoGXb4aj74AILT+znMgMwLdA19+S4tbVtd/V8EDVP m8N5CUN+XtHqG1FmZFv4e3jDXJ910qDbz5LYhOi5OwYv/bbsHJK8oq/OQ0q9UdJW jslWxtqMDhfB5zlccTNc4e4gKoQmLZiP8KU8ZFtMZoCJnaxsIpc86rFCj7HcXgTn VsY7xG6dsDe7Sm6/cmYj+97ZfQDN8Jn4oSI8nSw876iUwq9PTaq1zCVZ+5hPDdaz s+mdbyeMyCK/0Xl1g1M9GDVr7irfdwHd/NyASCqHsjXijlMtbT9Ko1h85ahMJxzl si8757hpIBDIcJx9mZTdnFzEKNjIiwwAFB+Cm8qI+AysbaDmiyJH+TSBnfRsbVKP 8h9RV5+BZR3+5G4aUyFlffl3alWWavIzjXR+C+lQSWZCLBKHYIc3nre+CQrj9+dV HO9gRVQ4fCQvu328tPf4j1isJP+/ofsjt4c8ZwSdY10WiRbaQ9s= =OxpV -----END PGP SIGNATURE----- --yf41p4OsM4E4v4pFvVFkki8jjhRAKSvsF--