void __ieee80211_subif_start_xmit(struct sk_buff *skb,
struct net_device *dev,
u32 info_flags)
{
if (!IS_ERR_OR_NULL(sta)) {
struct ieee80211_fast_tx *fast_tx;
/* We need a bit of data queued to build aggregates properly, so
* instruct the TCP stack to allow more than a single ms of data
* to be queued in the stack. The value is a bit-shift of 1
* second, so 8 is ~4ms of queued data. Only affects local TCP
* sockets.
*/
sk_pacing_shift_update(skb->sk, 8);
fast_tx = rcu_dereference(sta->fast_tx);
###############
TCP latency values test: The tcp_nup test in Flent (https://flent.org)
https://flent.org/intro.html#quick-start
I used the command but test failed:
flent tcp_download -p 1 -l 60 -H 192.168.1.5 -t text-to-be-included-in-plot -o file1.png
error loading plotter: unable to find plot configuration "1"
Try something like:
flent -H 192.168.1.5 -t "sk_pacing_shift 7" tcp_nup --test-parameter upload_streams=1
you can vary the number of TCP streams by changing the upload_streams parameter.
I'm assuming you are running Flent on the device
with the kernel you are trying to test, so you want a TCP transfer going
*from* the device. If not, change "tcp_nup" to "tcp_ndown" and
"upload_streams" to "download_streams". Upload is netperf TCP_STREAM
test, and download is TCP_MAERTS.
When running the above command you'll get a summary output on the
terminal that you can paste on the list; and also a data file to plot
things form. For instance, you can do something like 'flent -p ping_cdf
*.flent.gz' to get a CDF plot of all your test results afterwards.
###############
Shift 6:
root:~/flent$ flent -H 192.168.1.7 -t "sk_pacing_shift6" tcp_nup --test-parameter upload_streams=1
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-13T110414.699512.sk_pacing_shift6.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift6' (at 2018-08-13 03:04:14.699512):
avg median # data pts
Ping (ms) ICMP : 9.91 4.99 ms 350
TCP upload avg : 242.48 262.43 Mbits/s 301
TCP upload sum : 242.48 262.43 Mbits/s 301
TCP upload::1 : 242.48 263.34 Mbits/s 271
root:~/flent$ flent -H 192.168.1.7 -t "sk_pacing_shift6" tcp_nup --test-parameter upload_streams=1
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-13T113317.074077.sk_pacing_shift6.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift6' (at 2018-08-13 03:33:17.074077):
avg median # data pts
Ping (ms) ICMP : 7.75 5.30 ms 350
TCP upload avg : 239.17 250.84 Mbits/s 301
TCP upload sum : 239.17 250.84 Mbits/s 301
TCP upload::1 : 239.17 255.03 Mbits/s 266
Shift 7:
root:~/flent$ flent -H 192.168.1.7 -t "sk_pacing_shift7" tcp_nup --test-parameter upload_streams=1
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-13T122948.020974.sk_pacing_shift7.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift7' (at 2018-08-13 04:29:48.020974):
avg median # data pts
Ping (ms) ICMP : 14.12 6.61 ms 350
TCP upload avg : 188.19 188.04 Mbits/s 301
TCP upload sum : 188.19 188.04 Mbits/s 301
TCP upload::1 : 188.19 190.88 Mbits/s 258
root:~/flent$ flent -H 192.168.1.7 -t "sk_pacing_shift7" tcp_nup --test-parameter upload_streams=1
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-13T123129.526514.sk_pacing_shift7.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift7' (at 2018-08-13 04:31:29.526514):
avg median # data pts
Ping (ms) ICMP : 10.31 6.32 ms 350
TCP upload avg : 212.70 233.69 Mbits/s 301
TCP upload sum : 212.70 233.69 Mbits/s 301
TCP upload::1 : 212.70 237.65 Mbits/s 262
Shift 8:
root:~/flent$ flent -H 192.168.1.7 -t "sk_pacing_shift8" tcp_nup --test-parameter upload_streams=1
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-13T121433.187781.sk_pacing_shift8.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift8' (at 2018-08-13 04:14:33.187781):
avg median # data pts
Ping (ms) ICMP : 17.12 7.07 ms 350
TCP upload avg : 180.05 185.82 Mbits/s 301
TCP upload sum : 180.05 185.82 Mbits/s 301
TCP upload::1 : 180.05 189.41 Mbits/s 253
root:~/flent$ flent -H 192.168.1.7 -t "sk_pacing_shift8" tcp_nup --test-parameter upload_streams=1
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-13T121602.382575.sk_pacing_shift8.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift8' (at 2018-08-13 04:16:02.382575):
avg median # data pts
Ping (ms) ICMP : 13.90 5.89 ms 350
TCP upload avg : 207.56 228.16 Mbits/s 301
TCP upload sum : 207.56 228.16 Mbits/s 301
TCP upload::1 : 207.56 228.11 Mbits/s 259
Shift 10:
root:~/flent$ flent -H 192.168.1.7 -t "sk_pacing_shift10" tcp_nup --test-parameter upload_streams=1
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-13T121844.493498.sk_pacing_shift10.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift10' (at 2018-08-13 04:18:44.493498):
avg median # data pts
Ping (ms) ICMP : 15.11 7.41 ms 350
TCP upload avg : 162.38 164.10 Mbits/s 301
TCP upload sum : 162.38 164.10 Mbits/s 301
TCP upload::1 : 162.38 165.47 Mbits/s 252
root:~/flent$ flent -H 192.168.1.7 -t "sk_pacing_shift10" tcp_nup --test-parameter upload_streams=1
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-13T122108.347163.sk_pacing_shift10.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift10' (at 2018-08-13 04:21:08.347163):
avg median # data pts
Ping (ms) ICMP : 13.69 7.48 ms 350
TCP upload avg : 171.11 170.52 Mbits/s 301
TCP upload sum : 171.11 170.52 Mbits/s 301
TCP upload::1 : 171.11 171.36 Mbits/s 258
################################
Test result with upload_streams=5:
################################
root:~/flent/5stream$ flent -H 192.168.1.7 -t "sk_pacing_shift6" tcp_nup --test-parameter upload_streams=5
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-14T105332.356811.sk_pacing_shift6.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift6' (at 2018-08-14 02:53:32.356811):
avg median # data pts
Ping (ms) ICMP : 20.46 13.85 ms 350
TCP upload avg : 66.30 68.71 Mbits/s 301
TCP upload sum : 331.49 343.55 Mbits/s 301
TCP upload::1 : 60.80 64.65 Mbits/s 202
TCP upload::2 : 77.72 82.89 Mbits/s 211
TCP upload::3 : 60.52 56.09 Mbits/s 202
TCP upload::4 : 67.39 73.56 Mbits/s 204
TCP upload::5 : 65.06 71.97 Mbits/s 201
root:~/flent/5stream$ flent -H 192.168.1.7 -t "sk_pacing_shift6" tcp_nup --test-parameter upload_streams=5
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-14T105554.583603.sk_pacing_shift6.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift6' (at 2018-08-14 02:55:54.583603):
avg median # data pts
Ping (ms) ICMP : 20.86 13.80 ms 350
TCP upload avg : 75.88 83.17 Mbits/s 301
TCP upload sum : 379.42 415.84 Mbits/s 301
TCP upload::1 : 82.07 90.73 Mbits/s 225
TCP upload::2 : 74.08 78.29 Mbits/s 204
TCP upload::3 : 70.44 75.65 Mbits/s 217
TCP upload::4 : 82.70 92.86 Mbits/s 223
TCP upload::5 : 70.13 76.87 Mbits/s 210
sk_pacing_shift7:
root:~/flent/5stream$ flent -H 192.168.1.7 -t "sk_pacing_shift7" tcp_nup --test-parameter upload_streams=5
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-14T105759.169367.sk_pacing_shift7.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift7' (at 2018-08-14 02:57:59.169367):
avg median # data pts
Ping (ms) ICMP : 24.66 15.55 ms 350
TCP upload avg : 65.33 72.83 Mbits/s 301
TCP upload sum : 326.67 363.10 Mbits/s 301
TCP upload::1 : 77.60 92.93 Mbits/s 214
TCP upload::2 : 67.22 75.95 Mbits/s 213
TCP upload::3 : 65.81 74.54 Mbits/s 205
TCP upload::4 : 63.06 70.37 Mbits/s 207
TCP upload::5 : 52.98 55.78 Mbits/s 198
root:~/flent/5stream$ flent -H 192.168.1.7 -t "sk_pacing_shift7" tcp_nup --test-parameter upload_streams=5
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-14T105923.620572.sk_pacing_shift7.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift7' (at 2018-08-14 02:59:23.620572):
avg median # data pts
Ping (ms) ICMP : 25.03 14.25 ms 350
TCP upload avg : 74.35 85.64 Mbits/s 297
TCP upload sum : 371.77 428.19 Mbits/s 297
TCP upload::1 : 74.12 82.55 Mbits/s 216
TCP upload::2 : 67.78 71.87 Mbits/s 208
TCP upload::3 : 82.40 94.72 Mbits/s 210
TCP upload::4 : 70.77 82.43 Mbits/s 206
TCP upload::5 : 76.70 88.62 Mbits/s 210
sk_pacing_shift8:
root:~/flent/5stream$ flent -H 192.168.1.7 -t "sk_pacing_shift8" tcp_nup --test-parameter upload_streams=5
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-14T110334.670845.sk_pacing_shift8.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift8' (at 2018-08-14 03:03:34.670845):
avg median # data pts
Ping (ms) ICMP : 25.03 19.50 ms 350
TCP upload avg : 58.11 59.70 Mbits/s 301
TCP upload sum : 290.53 298.51 Mbits/s 301
TCP upload::1 : 51.37 51.74 Mbits/s 197
TCP upload::2 : 42.02 43.66 Mbits/s 192
TCP upload::3 : 61.17 62.33 Mbits/s 200
TCP upload::4 : 66.11 70.31 Mbits/s 198
TCP upload::5 : 69.86 76.31 Mbits/s 202
root:~/flent/5stream$ flent -H 192.168.1.7 -t "sk_pacing_shift8" tcp_nup --test-parameter upload_streams=5
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-14T110557.587769.sk_pacing_shift8.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift8' (at 2018-08-14 03:05:57.587769):
avg median # data pts
Ping (ms) ICMP : 21.50 13.05 ms 350
TCP upload avg : 61.59 62.00 Mbits/s 301
TCP upload sum : 307.93 310.01 Mbits/s 301
TCP upload::1 : 69.70 76.22 Mbits/s 210
TCP upload::2 : 68.51 74.88 Mbits/s 207
TCP upload::3 : 71.06 77.57 Mbits/s 200
TCP upload::4 : 47.08 51.42 Mbits/s 196
TCP upload::5 : 51.58 51.98 Mbits/s 203
sk_pacing_shift10:
root:~/flent/5stream$ flent -H 192.168.1.7 -t "sk_pacing_shift10" tcp_nup --test-parameter upload_streams=5
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-14T110814.434543.sk_pacing_shift10.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift10' (at 2018-08-14 03:08:14.434543):
avg median # data pts
Ping (ms) ICMP : 31.57 19.35 ms 350
TCP upload avg : 56.61 62.61 Mbits/s 301
TCP upload sum : 283.07 313.07 Mbits/s 301
TCP upload::1 : 39.39 42.96 Mbits/s 187
TCP upload::2 : 62.20 72.39 Mbits/s 193
TCP upload::3 : 61.72 74.31 Mbits/s 191
TCP upload::4 : 61.86 73.74 Mbits/s 190
TCP upload::5 : 57.90 65.11 Mbits/s 193
root:~/flent/5stream$ flent -H 192.168.1.7 -t "sk_pacing_shift10" tcp_nup --test-parameter upload_streams=5
Started Flent 1.2.2 using Python 2.7.12.
Starting tcp_nup test. Expected run time: 70 seconds.
Data file written to ./tcp_nup-2018-08-14T110931.986159.sk_pacing_shift10.flent.gz.
Summary of tcp_nup test run 'sk_pacing_shift10' (at 2018-08-14 03:09:31.986159):
avg median # data pts
Ping (ms) ICMP : 19.23 13.20 ms 350
TCP upload avg : 76.36 81.37 Mbits/s 301
TCP upload sum : 381.80 406.85 Mbits/s 301
TCP upload::1 : 64.95 67.91 Mbits/s 212
TCP upload::2 : 82.16 92.35 Mbits/s 215
TCP upload::3 : 67.51 70.18 Mbits/s 213
TCP upload::4 : 77.42 82.11 Mbits/s 232
TCP upload::5 : 89.76 99.96 Mbits/s 226
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