A system built from Jan 24/01 -current sup does this when I attempt to
run bonnie (on a VAX 4000/90A with 64Mb and enough free disk space):

vs4090a# bonnie
File './Bonnie.314', size: 104857600
Writing with putc()...^C^C^C^C^C^C^C^Z^Z^Z^Z^Z^Z^Z^\^\^\  (no affect)
load: 6.38  cmd: bonnie 314 [uvn_fp1] 15.94u 7.80s 0% 296k
load: 6.43  cmd: bonnie 314 [uvn_fp1] 15.93u 7.81s 0% 296k
load: 6.43  cmd: bonnie 314 [uvn_fp1] 15.93u 7.81s 0% 296k
load: 6.43  cmd: bonnie 314 [uvn_fp1] 15.93u 7.81s 0% 296k
load: 6.43  cmd: bonnie 314 [uvn_fp1] 15.93u 7.81s 0% 296k
load: 6.48  cmd: bonnie 314 [uvn_fp1] 15.93u 7.81s 0% 296k
load: 6.48  cmd: bonnie 314 [uvn_fp1] 15.94u 7.81s 0% 296k
load: 6.48  cmd: bonnie 314 [uvn_fp1] 15.94u 7.81s 0% 296k
load: 6.62  cmd: bonnie 314 [uvn_fp1] 15.93u 7.84s 0% 296k
load: 6.62  cmd: bonnie 314 [uvn_fp1] 15.93u 7.84s 0% 296k
load: 6.65  cmd: bonnie 314 [uvn_fp1] 15.93u 7.84s 0% 296k
load: 6.65  cmd: bonnie 314 [uvn_fp1] 15.93u 7.84s 0% 296k
load: 6.65  cmd: bonnie 314 [uvn_fp1] 15.93u 7.84s 0% 296k
load: 6.68  cmd: bonnie 314 [uvn_fp1] 15.93u 7.84s 0% 296k
load: 6.68  cmd: bonnie 314 [uvn_fp1] 15.93u 7.84s 0% 296k
load: 6.83  cmd: bonnie 314 [uvn_fp1] 15.93u 7.86s 0% 296k
load: 6.83  cmd: bonnie 314 [uvn_fp1] 15.93u 7.86s 0% 296k

with every new ^T I type, the load climbs...  (but seems to
stablize at 7.08 now while I type...)

system responds to pings also but that is about it.

Not sure what it means, but hopefully it is helpful to someone...