স্ট্রেস ব্যবহার করে সিপিইউ ব্যবহারের সময়কাল ধরে গণনা করা দরকার:
# top -b -n 1 -p 3889
top - 16:46:37 up 1:04, 3 users, load average: 0.00, 0.01, 0.02
Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 5594496 total, 5158284 free, 232132 used, 204080 buff/cache
KiB Swap: 3309564 total, 3309564 free, 0 used. 5113756 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3889 root 20 0 162016 2220 1544 S 0.0 0.0 0:05.77 top
# strace top -b -n 1 -p 3889
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stat("/proc/3889", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
open("/proc/3889/stat", O_RDONLY) = 7
read(7, "3889 (top) S 3854 3889 3854 3481"..., 1024) = 342
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nanosleep({0, 150000000}, NULL) = 0
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stat("/proc/3889", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
open("/proc/3889/stat", O_RDONLY) = 7
read(7, "3889 (top) S 3854 3889 3854 3481"..., 1024) = 342
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