Displays spinlock tracing information.

    Format

      SPL SHOW TRACE  [ /[NO]ACQUIRE | /CPU=n

                      | /[NO]FORKLOCK=forklock | /[NO]FRKDSPTH

                      | /[NO]FRKEND | /RATES | /[NO]RELEASE

                      | /[NO]SPINLOCK=spinlock | /SUMMARY

                      | /TOP=n | /TOTALS | /[NO]WAIT ]