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pnfs/flexfiles: report layoutstat regularly
As a simple scheme, report every minute if IO is still going on. Reviewed-by: Jeff Layton <jeff.layton@primarydata.com> Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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1bfe3b259f
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@ -452,14 +452,23 @@ nfs4_ff_layout_calc_completion_time(struct rpc_task *task)
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return ktime_sub(ktime_get(), task->tk_start);
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}
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static void
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static bool
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nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
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struct nfs4_ff_layoutstat *layoutstat)
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{
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static const ktime_t notime = {0};
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ktime_t now = ktime_get();
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nfs4_ff_start_busy_timer(&layoutstat->busy_timer);
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cmpxchg(&mirror->start_time, notime, ktime_get());
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cmpxchg(&mirror->start_time.tv64, notime.tv64, now.tv64);
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cmpxchg(&mirror->last_report_time.tv64, notime.tv64, now.tv64);
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if (ktime_to_ms(ktime_sub(now, mirror->last_report_time)) >=
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FF_LAYOUTSTATS_REPORT_INTERVAL) {
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mirror->last_report_time = now;
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return true;
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}
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return false;
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}
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static void
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@ -496,10 +505,15 @@ static void
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nfs4_ff_layout_stat_io_start_read(struct nfs4_ff_layout_mirror *mirror,
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__u64 requested)
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{
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bool report;
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spin_lock(&mirror->lock);
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nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat);
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report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat);
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nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested);
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spin_unlock(&mirror->lock);
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if (report)
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pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode);
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}
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static void
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@ -519,10 +533,15 @@ static void
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nfs4_ff_layout_stat_io_start_write(struct nfs4_ff_layout_mirror *mirror,
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__u64 requested)
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{
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bool report;
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spin_lock(&mirror->lock);
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nfs4_ff_layoutstat_start_io(mirror, &mirror->write_stat);
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report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat);
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nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested);
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spin_unlock(&mirror->lock);
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if (report)
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pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode);
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}
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static void
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@ -15,6 +15,9 @@
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* due to network error etc. */
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#define NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT 4096
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/* LAYOUTSTATS report interval in ms */
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#define FF_LAYOUTSTATS_REPORT_INTERVAL (60000L)
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struct nfs4_ff_ds_version {
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u32 version;
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u32 minor_version;
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@ -62,6 +65,7 @@ struct nfs4_ff_layoutstat {
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};
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struct nfs4_ff_layout_mirror {
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struct pnfs_layout_segment *lseg; /* back pointer */
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u32 ds_count;
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u32 efficiency;
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struct nfs4_ff_layout_ds *mirror_ds;
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@ -75,7 +79,7 @@ struct nfs4_ff_layout_mirror {
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struct nfs4_ff_layoutstat read_stat;
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struct nfs4_ff_layoutstat write_stat;
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ktime_t start_time;
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struct pnfs_layout_segment *lseg; /* back pointer */
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ktime_t last_report_time;
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};
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struct nfs4_ff_layout_segment {
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