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pnfs/flexfiles: report layoutstat regularly

Browse source 
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>
This commit is contained in:
Peng Tao 2015-06-23 19:52:04 +08:00 committed by Trond Myklebust
parent 1bfe3b259f
commit 97ba375b5d
2 changed files with 28 additions and 5 deletions
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27
fs/nfs/flexfilelayout/flexfilelayout.c
View file

@ -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

6
fs/nfs/flexfilelayout/flexfilelayout.h
View file

@ -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 {