f2fs: add a tracepoint for background gc
This patch introduces a tracepoint to monitor background gc behaviors. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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@ -77,6 +77,9 @@ static int gc_thread_func(void *data)
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stat_inc_bggc_count(sbi);
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trace_f2fs_background_gc(sbi->sb, wait_ms,
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prefree_segments(sbi), free_segments(sbi));
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/* if return value is not zero, no victim was selected */
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if (f2fs_gc(sbi, test_opt(sbi, FORCE_FG_GC)))
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wait_ms = gc_th->no_gc_sleep_time;
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@ -514,6 +514,34 @@ TRACE_EVENT(f2fs_map_blocks,
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__entry->ret)
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);
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TRACE_EVENT(f2fs_background_gc,
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TP_PROTO(struct super_block *sb, long wait_ms,
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unsigned int prefree, unsigned int free),
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TP_ARGS(sb, wait_ms, prefree, free),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(long, wait_ms)
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__field(unsigned int, prefree)
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__field(unsigned int, free)
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),
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TP_fast_assign(
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__entry->dev = sb->s_dev;
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__entry->wait_ms = wait_ms;
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__entry->prefree = prefree;
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__entry->free = free;
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),
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TP_printk("dev = (%d,%d), wait_ms = %ld, prefree = %u, free = %u",
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show_dev(__entry),
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__entry->wait_ms,
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__entry->prefree,
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__entry->free)
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);
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TRACE_EVENT(f2fs_get_victim,
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TP_PROTO(struct super_block *sb, int type, int gc_type,
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