wordwrap fix, and terminology adjustment

man/man8/offcputime.8

@@ -5,14 +5,14 @@ offcputime \- Summarize off-CPU time by kernel stack trace. Uses Linux eBPF/bcc.
 .B offcputime [\-h] [\-u] [\-p PID] [\-i INTERVAL] [\-T] [duration]
 .SH DESCRIPTION
 This program shows kernel stack traces and task names that were blocked and
-"off-CPU", and the total duration they were blocked: their "off-CPU time".
+"off-CPU", and the total duration they were not running: their "off-CPU time".
 It works by tracing when threads block and when they return to CPU, measuring
-both the time they were blocked and the blocked kernel stack trace and the
+both the time they were off-CPU and the blocked kernel stack trace and the
 task name. This data is summarized in the kernel using an eBPF map, and by
-summing the blocked time by unique stack trace and task name.
+summing the off-CPU time by unique stack trace and task name.
 
 The output summary will help you identify reasons why threads
-were blocking, and quantify the time they were blocked. This spans all types
+were blocking, and quantify the time they were off-CPU. This spans all types
 of blocking activity: disk I/O, network I/O, locks, page faults, involuntary
 context switches, etc.
 
@@ -46,17 +46,15 @@ duration
 Duration to trace, in seconds.
 .SH EXAMPLES
 .TP
-Trace all thread blocking events, and summarize (in-kernel) by kernel stack
-trace and total off-CPU time:
+Trace all thread blocking events, and summarize (in-kernel) by kernel stack trace and total off-CPU time:
 #
 .B offcputime
 .TP
 Trace for 5 seconds only:
 #
 .B offcputime 5
 .TP
-Trace for 5 seconds, and emit output in folded stack format (suitable for
-flame graphs):
+Trace for 5 seconds, and emit output in folded stack format (suitable for flame graphs):
 #
 .B offcputime -f 5
 .TP