netdev - RE: [PATCH net-next 3/3] net: stmmac: Introducing support for Page Pool

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Date:   Thu, 4 Jul 2019 12:59:22 +0000
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>
CC:     Jose Abreu <Jose.Abreu@...opsys.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>
Subject: RE: [PATCH net-next 3/3] net: stmmac: Introducing support for Page
 Pool

Thank you all for your review comments !

From: Ilias Apalodimas <ilias.apalodimas@...aro.org>

> That's why i was concerned on what will happen on > 1000b frames and what the
> memory pressure is going to be. 
> The trade off here is copying vs mapping/unmapping.

Well, the performance numbers I mentioned are for TSO with default MTU 
(1500) and using iperf3 with zero-copy. Here follows netperf:

---
# netperf -c -C -H 1.2.3.2 -T 7,7 -t TCP_SENDFILE
TCP SENDFILE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 1.2.3.2 
(1.2.3.2) port 0 AF_INET : demo : cpu bind
Recv   Send    Send                          Utilization       Service 
Demand
Socket Socket  Message  Elapsed              Send     Recv     Send    
Recv
Size   Size    Size     Time     Throughput  local    remote   local   
remote
bytes  bytes   bytes    secs.    10^6bits/s  % S      % S      us/KB   
us/KB

131072  16384  16384    10.00      9132.37   6.13     11.79    0.440   
0.846  

---
# netperf -c -C -H 1.2.3.2 -T 7,7 -t TCP_STREAM
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 
1.2.3.2 (1.2.3.2) port 0 AF_INET : demo : cpu bind
Recv   Send    Send                          Utilization       Service 
Demand
Socket Socket  Message  Elapsed              Send     Recv     Send    
Recv
Size   Size    Size     Time     Throughput  local    remote   local   
remote
bytes  bytes   bytes    secs.    10^6bits/s  % S      % S      us/KB   
us/KB

131072  16384  16384    10.01      9041.21   3.20     11.75    0.232   
0.852  

---
# netperf -c -C -H 1.2.3.2 -T 7,7 -t UDP_STREAM
MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 
1.2.3.2 (1.2.3.2) port 0 AF_INET : demo : cpu bind
Socket  Message  Elapsed      Messages                   CPU      
Service
Size    Size     Time         Okay Errors   Throughput   Util     Demand
bytes   bytes    secs            #      #   10^6bits/sec % SS     us/KB

212992   65507   10.00      114455      0     5997.0     12.55    1.371 
212992           10.00      114455            5997.0     8.12     0.887

---
# netperf -c -C -H 1.2.3.2 -T 7,7 -t UDP_STREAM -- -m 64
MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 
1.2.3.2 (1.2.3.2) port 0 AF_INET : demo : cpu bind
Socket  Message  Elapsed      Messages                   CPU      
Service
Size    Size     Time         Okay Errors   Throughput   Util     Demand
bytes   bytes    secs            #      #   10^6bits/sec % SS     us/KB

212992      64   10.00     4013480      0      205.4     12.51    39.918
212992           10.00     4013480             205.4     7.99     25.482

---
# netperf -c -C -H 1.2.3.2 -T 7,7 -t UDP_STREAM -- -m 128
MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 
1.2.3.2 (1.2.3.2) port 0 AF_INET : demo : cpu bind
Socket  Message  Elapsed      Messages                   CPU      
Service
Size    Size     Time         Okay Errors   Throughput   Util     Demand
bytes   bytes    secs            #      #   10^6bits/sec % SS     us/KB

212992     128   10.00     3950480      0      404.4     12.50    20.255
212992           10.00     3950442             404.4     7.70     12.485

---
# netperf -c -C -H 1.2.3.2 -T 7,7 -t UDP_STREAM -- -m 1024
MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 
1.2.3.2 (1.2.3.2) port 0 AF_INET : demo : cpu bind
Socket  Message  Elapsed      Messages                   CPU      
Service
Size    Size     Time         Okay Errors   Throughput   Util     Demand
bytes   bytes    secs            #      #   10^6bits/sec % SS     us/KB

212992    1024   10.00     3466506      0     2838.8     12.50    2.886 
212992           10.00     3466506            2838.8     7.39     1.707