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| author | Peng Tao <tao.peng@primarydata.com> | 2015-06-23 19:52:04 +0800 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-06-24 10:54:23 -0400 |
| commit | 97ba375b5df43790aa82c256f7f16ee8eb95c272 (patch) | |
| tree | a80da1b7f734307f02766c3dee4b5fa0d0654b29 /fs/nfs | |
| parent | 1bfe3b259ff2e579b2acb190f874397d53274497 (diff) | |
| download | linux-97ba375b5df43790aa82c256f7f16ee8eb95c272.tar.bz2 | |
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>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/flexfilelayout/flexfilelayout.c | 27 | ||||
| -rw-r--r-- | fs/nfs/flexfilelayout/flexfilelayout.h | 6 |
2 files changed, 28 insertions, 5 deletions
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 6bcb6d6c9dc3..d3b3b6236711 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -452,14 +452,23 @@ nfs4_ff_layout_calc_completion_time(struct rpc_task *task) return ktime_sub(ktime_get(), task->tk_start); } -static void +static bool nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror, struct nfs4_ff_layoutstat *layoutstat) { static const ktime_t notime = {0}; + ktime_t now = ktime_get(); nfs4_ff_start_busy_timer(&layoutstat->busy_timer); - cmpxchg(&mirror->start_time, notime, ktime_get()); + cmpxchg(&mirror->start_time.tv64, notime.tv64, now.tv64); + cmpxchg(&mirror->last_report_time.tv64, notime.tv64, now.tv64); + if (ktime_to_ms(ktime_sub(now, mirror->last_report_time)) >= + FF_LAYOUTSTATS_REPORT_INTERVAL) { + mirror->last_report_time = now; + return true; + } + + return false; } static void @@ -496,10 +505,15 @@ static void nfs4_ff_layout_stat_io_start_read(struct nfs4_ff_layout_mirror *mirror, __u64 requested) { + bool report; + spin_lock(&mirror->lock); - nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat); + report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat); nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested); spin_unlock(&mirror->lock); + + if (report) + pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode); } static void @@ -519,10 +533,15 @@ static void nfs4_ff_layout_stat_io_start_write(struct nfs4_ff_layout_mirror *mirror, __u64 requested) { + bool report; + spin_lock(&mirror->lock); - nfs4_ff_layoutstat_start_io(mirror, &mirror->write_stat); + report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat); nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested); spin_unlock(&mirror->lock); + + if (report) + pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode); } static void diff --git a/fs/nfs/flexfilelayout/flexfilelayout.h b/fs/nfs/flexfilelayout/flexfilelayout.h index 7e248874f46d..6fcd8d5e8e3d 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.h +++ b/fs/nfs/flexfilelayout/flexfilelayout.h @@ -15,6 +15,9 @@ * due to network error etc. */ #define NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT 4096 +/* LAYOUTSTATS report interval in ms */ +#define FF_LAYOUTSTATS_REPORT_INTERVAL (60000L) + struct nfs4_ff_ds_version { u32 version; u32 minor_version; @@ -62,6 +65,7 @@ struct nfs4_ff_layoutstat { }; struct nfs4_ff_layout_mirror { + struct pnfs_layout_segment *lseg; /* back pointer */ u32 ds_count; u32 efficiency; struct nfs4_ff_layout_ds *mirror_ds; @@ -75,7 +79,7 @@ struct nfs4_ff_layout_mirror { struct nfs4_ff_layoutstat read_stat; struct nfs4_ff_layoutstat write_stat; ktime_t start_time; - struct pnfs_layout_segment *lseg; /* back pointer */ + ktime_t last_report_time; }; struct nfs4_ff_layout_segment { |