• F
    perf lock: Always check min AND max wait time · 90c0e5fc
    Frederic Weisbecker 提交于
    When a lock is acquired after beeing contended, we update the
    wait time statistics for the given lock.
    But if the min wait time is updated, we don't check the max wait
    time. This is wrong because the first time we update the wait time,
    we want to update both min and max wait time.
    
    Before:
    	Name   acquired  contended total wait (ns)   max wait (ns)   min wait (ns)
    	key          8          1           21656           0           21656
    
    After:
    	Name   acquired  contended total wait (ns)   max wait (ns)   min wait (ns)
    	key          8          1           21656           21656           21656
    Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
    90c0e5fc
builtin-lock.c 22.7 KB