The top command is showing -1 as CPU number. PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 99223 danilo 10 52 0 136M 83636K nanslp 3 0:56 27.39% doxygen 1629 danilo 1 79 0 35456K 12228K CPU-1 -1 0:34 27.25% doxygen 3079 danilo 1 79 0 35456K 12268K CPU-1 -1 0:27 26.47% doxygen 99390 danilo 1 79 0 35456K 12260K CPU-1 -1 0:38 24.43% doxygen 1624 danilo 1 78 0 35456K 12120K CPU3 3 0:35 21.49% doxygen 462 danilo 1 52 0 35456K 12284K zio->i 1 0:37 20.37% doxygen 99353 danilo 1 79 0 35456K 12644K CPU-1 -1 0:38 19.33% doxygen 1967 danilo 1 78 0 35456K 12228K CPU-1 -1 0:34 18.50% doxygen I'm running current r273751. This bug is probably related to r273266 (cpuid u_char -> int).
This should be fixed by r273835.