===CONTROL_500ms===
/dev/mapper/d500: write completed in 502.56 ms
/dev/mapper/d500: write completed in 509.08 ms
===OVERFLOW_21474837ms_expect_5.96h===
/dev/mapper/dovf: write completed in 12.11 ms
/dev/mapper/dovf: write completed in 18.35 ms
===SHRINK_42949673ms_expect_11.9h===
/dev/mapper/dshrink: write completed in 0.03 ms
===ZERO_DELAY===
/dev/mapper/dnone: write completed in 0.03 ms
===dmsetup table (kernel-internal delay state)===
d500: 0 8192 delay 0:504430599 0 50        <- 500ms = 50 ticks, correct
dovf: 0 8192 delay 0:504430599 0 -2147483  <- NEGATIVE: 21474837*100 wraps int32, /1000
dshrink: 0 8192 delay 0:504430599 0 0      <- 42949673*100 mod 2^32 = 4 -> 0 ticks
dnone: 0 8192 delay 0:504430599 0 0
{ hz = 100, tick = 10000, tickadj = 5, profhz = 101, stathz = 101 }