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  • Oleg Nesterov's avatar
    tracing/perf: Expand TRACE_EVENT(sched_stat_runtime) · 36009d07
    Oleg Nesterov authored Aug 06, 2013
    To simplify the review of the next patches:
    
    1. We are going to reimplent __perf_task/counter and embedd them
       into TP_ARGS(). expand TRACE_EVENT(sched_stat_runtime) into
       DECLARE_EVENT_CLASS() + DEFINE_EVENT(), this way they can use
       different TP_ARGS's.
    
    2. Change perf_trace_##call() macro to do perf_fetch_caller_regs()
       right before perf_trace_buf_prepare().
    
       This way it evaluates TP_ARGS() asap, the next patch explores
       this fact.
    
       Note: after 87f44bbc perf_trace_buf_prepare() doesn't need
       "struct pt_regs *regs", perhaps it makes sense to remove this
       argument. And perhaps we can teach perf_trace_buf_submit()
       to accept regs == NULL and do fetch_caller_regs(CALLER_ADDR1)
       in this case.
    
    3. Cosmetic, but the typecast from "void*" buys nothing. It just
       adds the noise, remove it.
    
    Link: http://lkml.kernel.org/r/20130806160841.GA2736@redhat.com
    
    
    
    Acked-by: default avatarPeter Zijlstra <peterz@infradead.org>
    Tested-by: default avatarDavid Ahern <dsahern@gmail.com>
    Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
    Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    36009d07

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