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MidiSport 2x2 'Anniversary Edition'
Jakob Flierl edited this page Aug 2, 2015
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$ alsa-midi-latency-test -s 40 -i 24:1 -o 24:1 -R -w 1 -r
> alsa-midi-latency-test 0.0.3
> set_realtime_priority(SCHED_FIFO, 99).. done.
> clock resolution: 0.000000001 s
> interval between measurements: 1.000 .. 2.000 ms
> sampling 10000 midi latency values - please wait ...
> press Ctrl+C to abort test
> skipping first 40 latency samples
sample; latency_ms; latency_ms_worst
40; 4.79; 4.79
41; 4.80; 4.80
42; 5.24; 5.24
146; 5.25; 5.25
177; 5.26; 5.26
197; 5.32; 5.32
548; 5.33; 5.33
1181; 5.33; 5.33
3130; 5.34; 5.34
4758; 5.34; 5.34
7698; 5.38; 5.38
9999; 5.16; 5.38
> done.
> latency distribution:
...
3.1 - 3.2 ms: 1 #
3.2 - 3.3 ms: 3 #
3.3 - 3.4 ms: 8 #
3.4 - 3.5 ms: 13 #
3.5 - 3.6 ms: 7 #
3.6 - 3.7 ms: 12 #
3.7 - 3.8 ms: 14 #
3.8 - 3.9 ms: 16 #
3.9 - 4.0 ms: 15 #
4.0 - 4.1 ms: 24 #
4.1 - 4.2 ms: 85 ####
4.2 - 4.3 ms: 420 #####################
4.3 - 4.4 ms: 821 ########################################
4.4 - 4.5 ms: 1005 ##################################################
4.5 - 4.6 ms: 1004 ##################################################
4.6 - 4.7 ms: 953 ###############################################
4.7 - 4.8 ms: 939 ##############################################
4.8 - 4.9 ms: 970 ################################################
4.9 - 5.0 ms: 998 #################################################
5.0 - 5.1 ms: 1014 ##################################################
5.1 - 5.2 ms: 935 ##############################################
5.2 - 5.3 ms: 525 ##########################
5.3 - 5.4 ms: 177 #########
5.4 - 5.5 ms: 1 #
> SUCCESS
best latency was 3.11 ms
worst latency was 5.38 ms, which is great.