перевел на ng_car 8.0_STABLE
кроме того что врет в ограничении,загрузка CPU становится
# top -SHI
last pid: 21006; load averages: 3.00, 2.72, 2.56 up 1+02:41:22 16:19:37
91 processes: 4 running, 67 sleeping, 20 waiting
CPU: 2.3% user, 0.0% nice, 53.7% system, 44.0% interrupt, 0.0% idle
Mem: 12M Active, 37M Inact, 151M Wired, 112K Cache, 110M Buf, 781M Free
Swap: 499M Total, 499M Free
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND
12 root -68 - 0K 160K WAIT 317:43 43.55% {irq20: stge0}
1610 root 76 - 0K 8K RUN 41:39 31.30% ng_queue
0 root -68 0 0K 64K - 142:16 14.26% {em0 taskq}
12 root -68 - 0K 160K WAIT 48:20 2.88% {irq17: rl0}
12 root -32 - 0K 160K WAIT 24:31 0.68% {swi4: clock}
без ng_car, но с pipe ограничениями
# top -SHI
last pid: 90903; load averages: 0.81, 1.43, 1.96 up 1+02:48:28 16:26:43
90 processes: 2 running, 68 sleeping, 20 waiting
CPU: 12.9% user, 0.0% nice, 23.6% system, 14.3% interrupt, 49.3% idle
Mem: 12M Active, 37M Inact, 150M Wired, 112K Cache, 110M Buf, 781M Free
Swap: 499M Total, 499M Free
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND
11 root 171 ki31 0K 8K RUN 862:16 53.17% idle
12 root -68 - 0K 160K WAIT 319:24 16.06% {irq20: stge0}
0 root -68 0 0K 64K - 143:12 11.18% {em0 taskq}
12 root -68 - 0K 160K WAIT 48:37 3.66% {irq17: rl0}
12 root -32 - 0K 160K WAIT 24:39 0.68% {swi4: clock}
90903 root 76 0 6408K 3756K select 0:00 0.00% ssh