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Message-ID: <bc3fcce37ca80eb5972a56185fcb499872781700.camel@falix.de> Date: Wed, 06 Nov 2024 08:17:55 +0100 From: Felix Braun <f.braun@...ix.de> To: Heiner Kallweit <hkallweit1@...il.com>, nic_swsd@...ltek.com Cc: netdev@...r.kernel.org Subject: Re: r8169: regression in connection speed with kernels 6.2+ (interrupt coalescing) On 05.11.2024 22:28 +0100 Heiner Kallweit wrote: > On 05.11.2024 20:57, Felix Braun wrote: > > > > Measuring the performance with iperf3 I still see a difference in throughput by > > a factor of 3: > > > > WITH napi_defer_hard_irqs=0 > > =========================== > > [ 5] local 2001:a61:11c6:9501:982a:b19f:94fc:71d1 port 41716 connected to > > 2001:a61:11c6:9501:97a8:b80a:4317:435e port 5201 > > [ ID] Interval Transfer Bitrate Retr Cwnd > > [ 5] 0.00-1.00 sec 112 MBytes 941 Mbits/sec 0 315 KBytes > > [ 5] 1.00-2.00 sec 110 MBytes 927 Mbits/sec 0 340 KBytes > > [ 5] 2.00-3.00 sec 111 MBytes 930 Mbits/sec 0 372 KBytes > > [ 5] 3.00-4.00 sec 111 MBytes 930 Mbits/sec 0 372 KBytes > > [ 5] 4.00-5.00 sec 110 MBytes 926 Mbits/sec 0 372 KBytes > > [ 5] 5.00-6.00 sec 111 MBytes 929 Mbits/sec 0 372 KBytes > > [ 5] 6.00-7.00 sec 110 MBytes 924 Mbits/sec 0 372 KBytes > > [ 5] 7.00-8.00 sec 111 MBytes 932 Mbits/sec 0 372 KBytes > > [ 5] 8.00-9.00 sec 110 MBytes 924 Mbits/sec 0 372 KBytes > > [ 5] 9.00-10.00 sec 111 MBytes 928 Mbits/sec 0 372 KBytes > > - - - - - - - - - - - - - - - - - - - - - - - - - > > [ ID] Interval Transfer Bitrate Retr > > [ 5] 0.00-10.00 sec 1.08 GBytes 929 Mbits/sec 0 sender > > [ 5] 0.00-10.00 sec 1.08 GBytes 928 Mbits/sec receiver > > > > WITH napi_defer_hard_irqs=1 > > =========================== > > Connecting to host leporello, port 5201 > > [ 5] local 2001:a61:11c6:9501:982a:b19f:94fc:71d1 port 42338 connected to > > 2001:a61:11c6:9501:97a8:b80a:4317:435e port 5201 > > [ ID] Interval Transfer Bitrate Retr Cwnd > > [ 5] 0.00-1.00 sec 37.0 MBytes 310 Mbits/sec 0 806 KBytes > > [ 5] 1.00-2.00 sec 35.0 MBytes 294 Mbits/sec 0 806 KBytes > > [ 5] 2.00-3.00 sec 35.1 MBytes 294 Mbits/sec 0 806 KBytes > > [ 5] 3.00-4.00 sec 35.0 MBytes 294 Mbits/sec 0 806 KBytes > > [ 5] 4.00-5.00 sec 35.2 MBytes 296 Mbits/sec 0 806 KBytes > > [ 5] 5.00-6.00 sec 35.0 MBytes 294 Mbits/sec 0 806 KBytes > > [ 5] 6.00-7.00 sec 34.9 MBytes 293 Mbits/sec 0 806 KBytes > > [ 5] 7.00-8.00 sec 34.9 MBytes 293 Mbits/sec 0 806 KBytes > > [ 5] 8.00-9.00 sec 35.0 MBytes 294 Mbits/sec 0 806 KBytes > > [ 5] 9.00-10.00 sec 35.2 MBytes 295 Mbits/sec 0 806 KBytes > > - - - - - - - - - - - - - - - - - - - - - - - - - > > [ ID] Interval Transfer Bitrate Retr > > [ 5] 0.00-10.00 sec 352 MBytes 296 Mbits/sec 0 sender > > [ 5] 0.00-10.02 sec 349 MBytes 292 Mbits/sec receiver > > > > Could you please test also in the other direction (with option -R)? > WITH napi_defer_hard_irqs=0 =========================== Connecting to host leporello, port 5201 [ 5] local 2001:a61:11db:401:95c6:dca7:5be7:e7f0 port 33400 connected to 2001:a61:11db:401:f969:3328:8a89:ebd2 port 5201 [ 7] local 2001:a61:11db:401:95c6:dca7:5be7:e7f0 port 33414 connected to 2001:a61:11db:401:f969:3328:8a89:ebd2 port 5201 [ ID][Role] Interval Transfer Bitrate Retr Cwnd [ 5][TX-C] 0.00-1.00 sec 112 MBytes 939 Mbits/sec 0 409 KBytes [ 7][RX-C] 0.00-1.00 sec 107 MBytes 893 Mbits/sec [ 5][TX-C] 1.00-2.00 sec 110 MBytes 921 Mbits/sec 0 430 KBytes [ 7][RX-C] 1.00-2.00 sec 107 MBytes 896 Mbits/sec [ 5][TX-C] 2.00-3.00 sec 110 MBytes 925 Mbits/sec 0 430 KBytes [ 7][RX-C] 2.00-3.00 sec 106 MBytes 892 Mbits/sec [ 5][TX-C] 3.00-4.00 sec 110 MBytes 925 Mbits/sec 0 430 KBytes [ 7][RX-C] 3.00-4.00 sec 107 MBytes 898 Mbits/sec [ 5][TX-C] 4.00-5.00 sec 110 MBytes 925 Mbits/sec 0 430 KBytes [ 7][RX-C] 4.00-5.00 sec 106 MBytes 892 Mbits/sec [ 5][TX-C] 5.00-6.00 sec 110 MBytes 924 Mbits/sec 0 430 KBytes [ 7][RX-C] 5.00-6.00 sec 107 MBytes 895 Mbits/sec [ 5][TX-C] 6.00-7.00 sec 110 MBytes 926 Mbits/sec 0 430 KBytes [ 7][RX-C] 6.00-7.00 sec 106 MBytes 892 Mbits/sec [ 5][TX-C] 7.00-8.00 sec 110 MBytes 923 Mbits/sec 0 430 KBytes [ 7][RX-C] 7.00-8.00 sec 107 MBytes 894 Mbits/sec [ 5][TX-C] 8.00-9.00 sec 111 MBytes 930 Mbits/sec 0 430 KBytes [ 7][RX-C] 8.00-9.00 sec 107 MBytes 895 Mbits/sec [ 5][TX-C] 9.00-10.00 sec 111 MBytes 932 Mbits/sec 0 526 KBytes [ 7][RX-C] 9.00-10.00 sec 107 MBytes 895 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID][Role] Interval Transfer Bitrate Retr [ 5][TX-C] 0.00-10.00 sec 1.08 GBytes 928 Mbits/sec 0 sender [ 5][TX-C] 0.00-10.00 sec 1.08 GBytes 925 Mbits/sec receiver [ 7][RX-C] 0.00-10.00 sec 1.04 GBytes 895 Mbits/sec 0 sender [ 7][RX-C] 0.00-10.00 sec 1.04 GBytes 894 Mbits/sec receiver WITH napi_defer_hard_irqs=1 =========================== Connecting to host leporello, port 5201 [ 5] local 2001:a61:11db:401:95c6:dca7:5be7:e7f0 port 50504 connected to 2001:a61:11db:401:f969:3328:8a89:ebd2 port 5201 [ 7] local 2001:a61:11db:401:95c6:dca7:5be7:e7f0 port 50514 connected to 2001:a61:11db:401:f969:3328:8a89:ebd2 port 5201 [ ID][Role] Interval Transfer Bitrate Retr Cwnd [ 5][TX-C] 0.00-1.00 sec 36.8 MBytes 308 Mbits/sec 0 989 KBytes [ 7][RX-C] 0.00-1.00 sec 12.0 MBytes 101 Mbits/sec [ 5][TX-C] 1.00-2.00 sec 34.6 MBytes 290 Mbits/sec 0 989 KBytes [ 7][RX-C] 1.00-2.00 sec 12.6 MBytes 106 Mbits/sec [ 5][TX-C] 2.00-3.00 sec 33.1 MBytes 278 Mbits/sec 0 989 KBytes [ 7][RX-C] 2.00-3.00 sec 12.0 MBytes 101 Mbits/sec [ 5][TX-C] 3.00-4.00 sec 36.1 MBytes 303 Mbits/sec 0 989 KBytes [ 7][RX-C] 3.00-4.00 sec 12.5 MBytes 105 Mbits/sec [ 5][TX-C] 4.00-5.00 sec 34.6 MBytes 290 Mbits/sec 0 989 KBytes [ 7][RX-C] 4.00-5.00 sec 12.1 MBytes 102 Mbits/sec [ 5][TX-C] 5.00-6.00 sec 34.6 MBytes 290 Mbits/sec 0 989 KBytes [ 7][RX-C] 5.00-6.00 sec 12.1 MBytes 102 Mbits/sec [ 5][TX-C] 6.00-7.00 sec 34.6 MBytes 290 Mbits/sec 0 989 KBytes [ 7][RX-C] 6.00-7.00 sec 11.9 MBytes 99.6 Mbits/sec [ 5][TX-C] 7.00-8.00 sec 34.8 MBytes 292 Mbits/sec 0 989 KBytes [ 7][RX-C] 7.00-8.00 sec 12.0 MBytes 101 Mbits/sec [ 5][TX-C] 8.00-9.00 sec 34.6 MBytes 290 Mbits/sec 0 989 KBytes [ 7][RX-C] 8.00-9.00 sec 11.9 MBytes 99.6 Mbits/sec [ 5][TX-C] 9.00-10.00 sec 33.6 MBytes 282 Mbits/sec 0 989 KBytes [ 7][RX-C] 9.00-10.00 sec 12.0 MBytes 101 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID][Role] Interval Transfer Bitrate Retr [ 5][TX-C] 0.00-10.00 sec 348 MBytes 291 Mbits/sec 0 sender [ 5][TX-C] 0.00-10.01 sec 345 MBytes 289 Mbits/sec receiver [ 7][RX-C] 0.00-10.00 sec 122 MBytes 103 Mbits/sec 0 sender [ 7][RX-C] 0.00-10.01 sec 121 MBytes 102 Mbits/sec receiver BTW the problematic machine is called leporello and it was the iperf _server_ in all cases. The terminology in the iperf output is from the perspective of the client machine. So leporello's transmit performance suffers almost 9-fold with interrupt coalescing (the drop I had been measuring with my GUI tests), while its receive performance "only" drops 3-fold. Regarding ASPM I've now tried all possible settings in my BIOS. I can still not make the warning go away. The above measurements are with ASPM disabled in my BIOS. Regards Felix
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