Messages in this thread | | | Date | Fri, 07 Aug 2009 16:04:37 +0800 | From | Li Zefan <> | Subject | Re: [PATCH 3/6] tracing, page-allocator: Add trace event for page traffic related to the buddy lists |
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> +TRACE_EVENT(mm_page_alloc_zone_locked, > + > + TP_PROTO(struct page *page, unsigned int order, > + int migratetype, int percpu_refill), > + > + TP_ARGS(page, order, migratetype, percpu_refill), > + > + TP_STRUCT__entry( > + __field( struct page *, page ) > + __field( unsigned int, order ) > + __field( int, migratetype ) > + __field( int, percpu_refill ) > + ), > + > + TP_fast_assign( > + __entry->page = page; > + __entry->order = order; > + __entry->migratetype = migratetype; > + __entry->percpu_refill = percpu_refill; > + ), > + > + TP_printk("page=%p pfn=%lu order=%u migratetype=%d cpu=%d percpu_refill=%d", > + __entry->page, > + page_to_pfn(__entry->page), > + __entry->order, > + __entry->migratetype, > + smp_processor_id(),
This is the cpu when printk() is called, but not the cpu when this event happens.
And this information has already been stored, and is printed if context-info option is set, which is set by default.
> + __entry->percpu_refill) > +); > + > +TRACE_EVENT(mm_page_pcpu_drain, > + > + TP_PROTO(struct page *page, int order, int migratetype), > + > + TP_ARGS(page, order, migratetype), > + > + TP_STRUCT__entry( > + __field( struct page *, page ) > + __field( int, order ) > + __field( int, migratetype ) > + ), > + > + TP_fast_assign( > + __entry->page = page; > + __entry->order = order; > + __entry->migratetype = migratetype; > + ), > + > + TP_printk("page=%p pfn=%lu order=%d cpu=%d migratetype=%d", > + __entry->page, > + page_to_pfn(__entry->page), > + __entry->order, > + smp_processor_id(),
ditto
> + __entry->migratetype) > +); > +
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