Doc Type/Telemetry::Period

it causes build failure.

doc/Type/Telemetry/Period.pod6

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+=begin pod
+
+=TITLE class Telemetry::Period
+
+=SUBTITLE Performance data over a period
+
+    class Telemetry::Period { }
+
+A C<Telemetry::Period> object contains the difference between two C<Telemetry>
+objects.  It is generally not created by calling .new, but it can be if needed:
+it takes "cpu-user", "cpu-sys" and "wallclock" as named parameters.
+
+=begin code
+# basic usage
+use Telemetry;
+my $t0 = Telemetry.new;
+# execute some code
+my $t1 = Telemetry.new;
+my $period = $t1 - $t0;  # creates Telemetry::Period object
+say "Code took $period (cpu / wallclock) microseconds to execute";
+=end code
+
+=head2 Data Methods
+
+=item method affinity-tasks-completed
+
+The number of tasks completed in affinity threads in this period.
+
+=item method affinity-tasks-queued
+
+The number of tasks queued for execution in affinity threads in this period.
+
+=item method affinity-workers
+
+The number of affinity threads added in this period.
+
+=item method cpu
+
+Returns the total amount of CPU time of this period (in microseconds),
+essentially the sum of C<cpu-user> and C<cpu-sys>.
+
+=item method cpus
+
+Returns the number of CPUs that were in full use on average in this period
+(basically L<cpu> divided by L<wallclock>).
+
+=item method cpu-user
+
+Returns the amount of CPU time spent on executing user code of this period
+(in microseconds).
+
+=item method cpu-sys
+
+Returns the amount of CPU time spent in system overhead of this period (in
+microseconds).
+
+=item method general-tasks-completed
+
+The number of tasks completed in general worker threads in this period.
+
+=item method general-tasks-queued
+
+The number of tasks queued for execution in general worker threads in this period.
+
+=item method general-workers
+
+The number of general worker threads that were added in this period.
+
+=item method max-rss
+
+Maximum resident set size increase for this period (in Kbytes).
+
+=item method supervisor
+
+The number of supervisor threads added in this period.
+
+=item method timer-tasks-completed
+
+The number of tasks completed in timer worker threads in this period.
+
+=item method timer-tasks-queued
+
+The number of tasks queued for execution in timer worker threads in this period.
+
+=item method timer-workers
+
+The number of timer worker threads that were added in this period.
+
+=item method utilization
+
+Returns the % of CPUs that were used on average in this period.
+
+=item method wallclock
+
+Returns the length of the period (in microseconds).
+
+Apart from these data methods, other fields in the POSIX C<getrusage> struct
+are also available, but are probably not in use on most operating systems and
+will thus always give 0.  These are:
+
+id-rss, inblock, invcw, is-rss, ix-rss, maj-flt, min-flt, msgrcv, msgsnd,
+nsignals, nswap, nvcsw, outblock.
+
+Please consult the C<getrusage> manual information for the meaning of these
+fields.
+
+=head1 Other methods
+
+=head2 method gist / method Str
+
+Returns a string representation in the form "cpu / wallclock".
+
+=head1 See Also
+
+L<Telemetry>
+L<snapper>
+
+=end pod