• Bharata B Rao's avatar
    cpuacct: add per-cgroup utime/stime statistics · ef12fefa
    Bharata B Rao authored
    Add per-cgroup cpuacct controller statistics like the system and user
    time consumed by the group of tasks.
    
    Changelog:
    
    v7
    - Changed the name of the statistic from utime to user and from stime to
      system so that in future we could easily add other statistics like irq,
      softirq, steal times etc easily.
    
    v6
    - Fixed a bug in the error path of cpuacct_create() (pointed by Li Zefan).
    
    v5
    - In cpuacct_stats_show(), use cputime64_to_clock_t() since we are
      operating on a 64bit variable here.
    
    v4
    - Remove comments in cpuacct_update_stats() which explained why rcu_read_lock()
      was needed (as per Peter Zijlstra's review comments).
    - Don't say that percpu_counter_read() is broken in Documentation/cpuacct.txt
      as per KAMEZAWA Hiroyuki's review comments.
    
    v3
    - Fix a small race in the cpuacct hierarchy walk.
    
    v2
    - stime and utime now exported in clock_t units instead of msecs.
    - Addressed the code review comments from Balbir and Li Zefan.
    - Moved to -tip tree.
    
    v1
    - Moved the stime/utime accounting to cpuacct controller.
    
    Earlier versions
    - http://lkml.org/lkml/2009/2/25/129Signed-off-by: default avatarBharata B Rao <bharata@linux.vnet.ibm.com>
    Signed-off-by: default avatarBalaji Rao <balajirrao@gmail.com>
    Cc: Dhaval Giani <dhaval@linux.vnet.ibm.com>
    Cc: Paul Menage <menage@google.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Reviewed-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
    Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
    Acked-by: default avatarBalbir Singh <balbir@linux.vnet.ibm.com>
    Tested-by: default avatarBalbir Singh <balbir@linux.vnet.ibm.com>
    LKML-Reference: <20090331043222.GA4093@in.ibm.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    ef12fefa
cpuacct.txt 1.9 KB