select02: SYS__newselect variant broken for armv7

[MatthiasWauer]

select02 test failes on armv7 for the _newselect systemcall test variant.

kernel 6.6.123, built with -D_TIME_BITS=64

Some investigation suggests the timeout value is not passed correctly to _newselect.

output:

tst_test.c:1709: TINFO: LTP version: 20240129
tst_test.c:1593: TINFO: Timeout per run is 0h 00m 30s
select_var.h:109: TINFO: Testing libc select()
tst_timer_test.c:357: TINFO: CLOCK_MONOTONIC resolution 1ns
tst_timer_test.c:369: TINFO: prctl(PR_GET_TIMERSLACK) = 50us
tst_test.c:1601: TINFO: Updating max runtime to 0h 00m 09s
tst_test.c:1593: TINFO: Timeout per run is 0h 00m 39s
tst_timer_test.c:263: TINFO: select() sleeping for 1000us 500 iterations, threshold 450.01us
tst_timer_test.c:305: TINFO: min 1067us, max 1123us, median 1099us, trunc mean 1097.75us (discarded 25)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 2000us 500 iterations, threshold 450.01us
tst_timer_test.c:305: TINFO: min 2090us, max 2158us, median 2100us, trunc mean 2100.85us (discarded 25)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 5000us 300 iterations, threshold 450.04us
tst_timer_test.c:305: TINFO: min 5092us, max 5128us, median 5107us, trunc mean 5106.42us (discarded 15)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 10000us 100 iterations, threshold 450.33us
tst_timer_test.c:305: TINFO: min 10092us, max 10124us, median 10110us, trunc mean 10113.46us (discarded 5)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 25000us 50 iterations, threshold 451.29us
tst_timer_test.c:305: TINFO: min 25104us, max 25132us, median 25125us, trunc mean 25123.73us (discarded 2)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 100000us 10 iterations, threshold 537.00us
tst_timer_test.c:305: TINFO: min 100154us, max 100180us, median 100175us, trunc mean 100171.33us (discarded 1)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 1000000us 2 iterations, threshold 4400.00us
tst_timer_test.c:305: TINFO: min 1001078us, max 1001079us, median 1001078us, trunc mean 1001078.00us (discarded 1)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
select_var.h:112: TINFO: Testing SYS_select syscall
tst_timer_test.c:357: TINFO: CLOCK_MONOTONIC resolution 1ns
tst_timer_test.c:369: TINFO: prctl(PR_GET_TIMERSLACK) = 50us
tst_test.c:1601: TINFO: Updating max runtime to 0h 00m 09s
tst_test.c:1593: TINFO: Timeout per run is 0h 00m 39s
tst_timer_test.c:263: TINFO: select() sleeping for 1000us 500 iterations, threshold 450.01us
select_var.h:40: TCONF: syscall(-1) __NR_select not supported on your arch
select_var.h:115: TINFO: Testing SYS_pselect6 syscall
tst_timer_test.c:357: TINFO: CLOCK_MONOTONIC resolution 1ns
tst_timer_test.c:369: TINFO: prctl(PR_GET_TIMERSLACK) = 50us
tst_test.c:1601: TINFO: Updating max runtime to 0h 00m 09s
tst_test.c:1593: TINFO: Timeout per run is 0h 00m 39s
tst_timer_test.c:263: TINFO: select() sleeping for 1000us 500 iterations, threshold 450.01us
tst_timer_test.c:305: TINFO: min 1067us, max 1166us, median 1099us, trunc mean 1097.50us (discarded 25)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 2000us 500 iterations, threshold 450.01us
tst_timer_test.c:305: TINFO: min 2090us, max 2150us, median 2100us, trunc mean 2101.31us (discarded 25)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 5000us 300 iterations, threshold 450.04us
tst_timer_test.c:305: TINFO: min 5091us, max 5127us, median 5107us, trunc mean 5106.56us (discarded 15)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 10000us 100 iterations, threshold 450.33us
tst_timer_test.c:305: TINFO: min 10095us, max 10127us, median 10113us, trunc mean 10113.97us (discarded 5)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 25000us 50 iterations, threshold 451.29us
tst_timer_test.c:305: TINFO: min 25097us, max 25135us, median 25124us, trunc mean 25122.10us (discarded 2)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 100000us 10 iterations, threshold 537.00us
tst_timer_test.c:305: TINFO: min 100160us, max 100184us, median 100173us, trunc mean 100170.22us (discarded 1)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 1000000us 2 iterations, threshold 4400.00us
tst_timer_test.c:305: TINFO: min 1001079us, max 1001079us, median 1001079us, trunc mean 1001079.00us (discarded 1)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
select_var.h:118: TINFO: Testing SYS_pselect6 time64 syscall
tst_timer_test.c:357: TINFO: CLOCK_MONOTONIC resolution 1ns
tst_timer_test.c:369: TINFO: prctl(PR_GET_TIMERSLACK) = 50us
tst_test.c:1601: TINFO: Updating max runtime to 0h 00m 09s
tst_test.c:1593: TINFO: Timeout per run is 0h 00m 39s
tst_timer_test.c:263: TINFO: select() sleeping for 1000us 500 iterations, threshold 450.01us
tst_timer_test.c:305: TINFO: min 1067us, max 1172us, median 1098us, trunc mean 1097.37us (discarded 25)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 2000us 500 iterations, threshold 450.01us
tst_timer_test.c:305: TINFO: min 2097us, max 2167us, median 2099us, trunc mean 2101.06us (discarded 25)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 5000us 300 iterations, threshold 450.04us
tst_timer_test.c:305: TINFO: min 5098us, max 5154us, median 5106us, trunc mean 5105.67us (discarded 15)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 10000us 100 iterations, threshold 450.33us
tst_timer_test.c:305: TINFO: min 10102us, max 10135us, median 10112us, trunc mean 10113.29us (discarded 5)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 25000us 50 iterations, threshold 451.29us
tst_timer_test.c:305: TINFO: min 25102us, max 25170us, median 25123us, trunc mean 25120.71us (discarded 2)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 100000us 10 iterations, threshold 537.00us
tst_timer_test.c:305: TINFO: min 100161us, max 100206us, median 100173us, trunc mean 100174.11us (discarded 1)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
tst_timer_test.c:263: TINFO: select() sleeping for 1000000us 2 iterations, threshold 4400.00us
tst_timer_test.c:305: TINFO: min 1001106us, max 1001109us, median 1001106us, trunc mean 1001106.00us (discarded 1)
tst_timer_test.c:326: TPASS: Measured times are within thresholds
select_var.h:121: TINFO: Testing SYS__newselect syscall
tst_timer_test.c:357: TINFO: CLOCK_MONOTONIC resolution 1ns
tst_timer_test.c:369: TINFO: prctl(PR_GET_TIMERSLACK) = 50us
tst_test.c:1601: TINFO: Updating max runtime to 0h 00m 09s
tst_test.c:1593: TINFO: Timeout per run is 0h 00m 39s
tst_timer_test.c:263: TINFO: select() sleeping for 1000us 500 iterations, threshold 450.01us
tst_timer_test.c:292: TFAIL: select() woken up early 500 times range: [74,3]
tst_timer_test.c:305: TINFO: min 3us, max 74us, median 3us, trunc mean 3.00us (discarded 25)
tst_timer_test.c:263: TINFO: select() sleeping for 2000us 500 iterations, threshold 450.01us
tst_timer_test.c:292: TFAIL: select() woken up early 500 times range: [50,3]
tst_timer_test.c:305: TINFO: min 3us, max 50us, median 3us, trunc mean 3.07us (discarded 25)
tst_timer_test.c:263: TINFO: select() sleeping for 5000us 300 iterations, threshold 450.04us
tst_timer_test.c:292: TFAIL: select() woken up early 300 times range: [51,2]
tst_timer_test.c:305: TINFO: min 2us, max 51us, median 3us, trunc mean 2.98us (discarded 15)
tst_timer_test.c:263: TINFO: select() sleeping for 10000us 100 iterations, threshold 450.33us
tst_timer_test.c:292: TFAIL: select() woken up early 100 times range: [4,2]
tst_timer_test.c:305: TINFO: min 2us, max 4us, median 2us, trunc mean 2.22us (discarded 5)
tst_timer_test.c:263: TINFO: select() sleeping for 25000us 50 iterations, threshold 451.29us
tst_timer_test.c:292: TFAIL: select() woken up early 50 times range: [3,2]
tst_timer_test.c:305: TINFO: min 2us, max 3us, median 2us, trunc mean 2.35us (discarded 2)
tst_timer_test.c:263: TINFO: select() sleeping for 100000us 10 iterations, threshold 537.00us
tst_timer_test.c:292: TFAIL: select() woken up early 10 times range: [3,2]
tst_timer_test.c:305: TINFO: min 2us, max 3us, median 2us, trunc mean 2.33us (discarded 1)
tst_timer_test.c:263: TINFO: select() sleeping for 1000000us 2 iterations, threshold 4400.00us
tst_timer_test.c:305: TINFO: min 1001076us, max 1001078us, median 1001076us, trunc mean 1001076.00us (discarded 1)
tst_timer_test.c:326: TPASS: Measured times are within thresholds

Summary:
passed   22
failed   6
broken   0
skipped  1
warnings 0

Running the test through strace seems to show that the timeout parameters are not passed correctly:

strace -f -e trace=all -o /tmp/select02.strace /opt/ltp/testcases/bin/select02
grep select /tmp/select02.strace | grep -v unfinished | grep -v resumed | uniq

yields (tv_usec is always 0 for _newselect).

802   execve("/opt/ltp/testcases/bin/select02", ["/opt/ltp/testcases/bin/select02"], 0xbeef0d04 /* 19 vars */) = 0
802   openat(AT_FDCWD, "/dev/shm/ltp_select02_802", O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600) = 3
802   chmod("/dev/shm/ltp_select02_802", 0666) = 0
802   unlink("/dev/shm/ltp_select02_802") = 0
803   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=1000000}, NULL) = 0 (Timeout)
803   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=2000000}, NULL) = 0 (Timeout)
803   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=5000000}, NULL) = 0 (Timeout)
803   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=10000000}, NULL) = 0 (Timeout)
803   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=25000000}, NULL) = 0 (Timeout)
803   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=100000000}, NULL) = 0 (Timeout)
803   pselect6_time64(1, [], NULL, NULL, {tv_sec=1, tv_nsec=0}, NULL) = 0 (Timeout)
805   write(2, "select_var.h:40: \33[1;33mTCONF: \33"..., 86) = 86
807   pselect6(1, [], NULL, NULL, {tv_sec=0, tv_nsec=1000000}, NULL) = 0 (Timeout)
807   pselect6(1, [], NULL, NULL, {tv_sec=0, tv_nsec=2000000}, NULL) = 0 (Timeout)
807   pselect6(1, [], NULL, NULL, {tv_sec=0, tv_nsec=5000000}, NULL) = 0 (Timeout)
807   pselect6(1, [], NULL, NULL, {tv_sec=0, tv_nsec=10000000}, NULL) = 0 (Timeout)
807   pselect6(1, [], NULL, NULL, {tv_sec=0, tv_nsec=25000000}, NULL) = 0 (Timeout)
807   pselect6(1, [], NULL, NULL, {tv_sec=0, tv_nsec=100000000}, NULL) = 0 (Timeout)
807   pselect6(1, [], NULL, NULL, {tv_sec=1, tv_nsec=0}, NULL) = 0 (Timeout)
810   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=1000000}, NULL) = 0 (Timeout)
810   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=2000000}, NULL) = 0 (Timeout)
810   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=5000000}, NULL) = 0 (Timeout)
810   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=10000000}, NULL) = 0 (Timeout)
810   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=25000000}, NULL) = 0 (Timeout)
810   pselect6_time64(1, [], NULL, NULL, {tv_sec=0, tv_nsec=100000000}, NULL) = 0 (Timeout)
810   pselect6_time64(1, [], NULL, NULL, {tv_sec=1, tv_nsec=0}, NULL) = 0 (Timeout)
813   _newselect(1, [], NULL, NULL, {tv_sec=0, tv_usec=0}) = 0 (Timeout)
813   _newselect(1, [], NULL, NULL, {tv_sec=1, tv_usec=0}) = 0 (Timeout)

I know it is a rather old LTP version. I checked issues, patchwork, and current master for any fixes or explanations and found none.