pselect01_64 failed on slow machine

Pselect failed on slow machines and slow cpu freq governors.


root@hikey:/home/linaro# ./pselect01_64
tst_test.c:898: INFO: Timeout per run is 0h 05m 00s
tst_timer_test.c:344: INFO: CLOCK_MONOTONIC resolution 1ns
tst_timer_test.c:356: INFO: prctl(PR_GET_TIMERSLACK) = 50us
tst_timer_test.c:274: INFO: pselect() sleeping for 1000us 500 iterations, threshold 450.01us
tst_timer_test.c:317: INFO: min 1082us, max 1171us, median 1089us, trunc mean 1089.79us (discarded 25)
tst_timer_test.c:332: PASS: Measured times are within thresholds
tst_timer_test.c:274: INFO: pselect() sleeping for 2000us 500 iterations, threshold 450.01us
tst_timer_test.c:317: INFO: min 2083us, max 2154us, median 2092us, trunc mean 2094.12us (discarded 25)
tst_timer_test.c:332: PASS: Measured times are within thresholds
tst_timer_test.c:274: INFO: pselect() sleeping for 5000us 300 iterations, threshold 450.04us
tst_timer_test.c:317: INFO: min 5091us, max 5211us, median 5106us, trunc mean 5105.92us (discarded 15)
tst_timer_test.c:332: PASS: Measured times are within thresholds
tst_timer_test.c:274: INFO: pselect() sleeping for 10000us 100 iterations, threshold 450.33us
tst_timer_test.c:317: INFO: min 10092us, max 10509us, median 10108us, trunc mean 10135.28us (discarded 5)
tst_timer_test.c:332: PASS: Measured times are within thresholds
tst_timer_test.c:274: INFO: pselect() sleeping for 25000us 50 iterations, threshold 451.29us
tst_timer_test.c:317: INFO: min 25104us, max 25397us, median 25252us, trunc mean 25254.94us (discarded 2)
tst_timer_test.c:332: PASS: Measured times are within thresholds
tst_timer_test.c:274: INFO: pselect() sleeping for 100000us 10 iterations, threshold 537.00us
tst_timer_test.c:317: INFO: min 100326us, max 100375us, median 100346us, trunc mean 100344.00us (discarded 1)
tst_timer_test.c:332: PASS: Measured times are within thresholds
tst_timer_test.c:274: INFO: pselect() sleeping for 1000000us 2 iterations, threshold 4400.00us
tst_timer_test.c:317: INFO: min 1001252us, max 1001283us, median 1001252us, trunc mean 1001252.00us (discarded 1)
tst_timer_test.c:332: PASS: Measured times are within thresholds

Summary:
passed   7
failed   0
skipped  0
root@hikey:/home/linaro# cat  /sys/devices/system/cpu/cpufreq/policy0/scaling_available_governors
conservative ondemand userspace powersave performance schedutil
root@hikey:/home/linaro# echo powersave >  /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
root@hikey:/home/linaro# ./pselect01_64
tst_test.c:898: INFO: Timeout per run is 0h 05m 00s
tst_timer_test.c:344: INFO: CLOCK_MONOTONIC resolution 1ns
tst_timer_test.c:356: INFO: prctl(PR_GET_TIMERSLACK) = 50us
tst_timer_test.c:274: INFO: pselect() sleeping for 1000us 500 iterations, threshold 450.01us
tst_timer_test.c:317: INFO: min 1260us, max 1540us, median 1265us, trunc mean 1296.58us (discarded 25)
tst_timer_test.c:332: PASS: Measured times are within thresholds
tst_timer_test.c:274: INFO: pselect() sleeping for 2000us 500 iterations, threshold 450.01us
tst_timer_test.c:317: INFO: min 2269us, max 3003us, median 2593us, trunc mean 2620.10us (discarded 25)
tst_timer_test.c:320: FAIL: pselect() slept for too long

 Time: us | Frequency
--------------------------------------------------------------------------------
     2269 | +
     2308 |
     2347 |
     2386 |
     2425 |
     2464 |
     2503 |
     2542 | ********************************
     2581 | ********************************************************************
     2620 | **+
     2659 |
     2698 |
     2737 | *********************-
     2776 | *******
     2815 | +
     2854 | -
     2893 |
     2932 |
     2971 | -
--------------------------------------------------------------------------------
     39us | 1 sample = 0.26667 '*', 0.53333 '+', 1.06667 '-', non-zero '.'

tst_timer_test.c:274: INFO: pselect() sleeping for 5000us 300 iterations, threshold 450.04us
tst_timer_test.c:317: INFO: min 5583us, max 5844us, median 5606us, trunc mean 5615.83us (discarded 15)
tst_timer_test.c:320: FAIL: pselect() slept for too long

 Time: us | Frequency
--------------------------------------------------------------------------------
     5583 | *+
     5597 | ********************************************************************
     5611 | ****+
     5625 | *******************+
     5639 | ***********+
     5653 | -
     5667 |
     5681 |
     5695 |
     5709 |
     5723 | -
     5737 |
     5751 |
     5765 |
     5779 | +
     5793 | **+
     5807 | *
     5821 | -
     5835 | *+
--------------------------------------------------------------------------------
     14us | 1 sample = 0.37569 '*', 0.75138 '+', 1.50276 '-', non-zero '.'

tst_timer_test.c:274: INFO: pselect() sleeping for 10000us 100 iterations, threshold 450.33us
tst_timer_test.c:317: INFO: min 10599us, max 11180us, median 10608us, trunc mean 10633.73us (discarded 5)
tst_timer_test.c:320: FAIL: pselect() slept for too long

 Time: us | Frequency
--------------------------------------------------------------------------------
    10599 | ********************************************************************
    10630 | **********-
    10661 |
    10692 | **+
    10723 |
    10754 |
    10785 | *****+
    10816 | *****+
    10847 | +
    10878 |
    10909 |
    10940 |
    10971 |
    11002 |
    11033 |
    11064 |
    11095 |
    11126 |
    11157 | +
--------------------------------------------------------------------------------
     31us | 1 sample = 0.94444 '*', 1.88889 '+', 3.77778 '-', non-zero '.'

tst_timer_test.c:274: INFO: pselect() sleeping for 25000us 50 iterations, threshold 451.29us
tst_timer_test.c:317: INFO: min 25603us, max 25848us, median 25618us, trunc mean 25623.69us (discarded 2)
tst_timer_test.c:320: FAIL: pselect() slept for too long

 Time: us | Frequency
--------------------------------------------------------------------------------
    25603 | ********************************************************************
    25616 | *******************************
    25629 | *******************************
    25642 |
    25655 |
    25668 |
    25681 |
    25694 |
    25707 | **+
    25720 |
    25733 |
    25746 |
    25759 |
    25772 |
    25785 |
    25798 |
    25811 | **+
    25824 | **+
    25837 | **+
--------------------------------------------------------------------------------
     13us | 1 sample = 2.83333 '*', 5.66667 '+', 11.33333 '-', non-zero '.'

tst_timer_test.c:274: INFO: pselect() sleeping for 100000us 10 iterations, threshold 537.00us
tst_timer_test.c:317: INFO: min 100658us, max 100717us, median 100666us, trunc mean 100671.22us (discarded 1)
tst_timer_test.c:320: FAIL: pselect() slept for too long

 Time: us | Frequency
--------------------------------------------------------------------------------
   100658 | ********************************************************************
   100662 | ********************************************************************
   100666 | **********************************
   100670 | **********************************
   100674 | **********************************
   100678 |
   100682 |
   100686 | **********************************
   100690 |
   100694 |
   100698 | **********************************
   100702 |
   100706 |
   100710 |
   100714 | **********************************
--------------------------------------------------------------------------------
      4us | 1 sample = 34.00000 '*', 68.00000 '+', 136.00000 '-', non-zero '.'

tst_timer_test.c:274: INFO: pselect() sleeping for 1000000us 2 iterations, threshold 4400.00us
tst_timer_test.c:317: INFO: min 1001644us, max 1001753us, median 1001644us, trunc mean 1001644.00us (discarded 1)
tst_timer_test.c:332: PASS: Measured times are within thresholds

Summary:
passed   2
failed   5
skipped  0
warnings 0
root@hikey:/home/linaro#