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pNFS/flexfiles: Support server-supplied layoutstats sampling period
Some servers want to be able to control the frequency with which clients report layoutstats, for instance, in order to monitor QoS for a particular file or set of file. In order to support this, the flexfiles layout allows the server to pass this info as a hint in the layout payload. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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parent
f4848303ce
commit
d0379a5d06
2 changed files with 14 additions and 3 deletions
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@ -505,9 +505,17 @@ ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
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}
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p = xdr_inline_decode(&stream, 4);
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if (p)
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fls->flags = be32_to_cpup(p);
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if (!p)
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goto out_sort_mirrors;
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fls->flags = be32_to_cpup(p);
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p = xdr_inline_decode(&stream, 4);
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if (!p)
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goto out_sort_mirrors;
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for (i=0; i < fls->mirror_array_cnt; i++)
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fls->mirror_array[i]->report_interval = be32_to_cpup(p);
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out_sort_mirrors:
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ff_layout_sort_mirrors(fls);
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rc = ff_layout_check_layout(lgr);
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if (rc)
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@ -603,7 +611,9 @@ nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
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mirror->start_time = now;
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if (ktime_equal(mirror->last_report_time, notime))
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mirror->last_report_time = now;
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if (layoutstats_timer != 0)
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if (mirror->report_interval != 0)
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report_interval = (s64)mirror->report_interval * 1000LL;
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else if (layoutstats_timer != 0)
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report_interval = (s64)layoutstats_timer * 1000LL;
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if (ktime_to_ms(ktime_sub(now, mirror->last_report_time)) >=
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report_interval) {
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@ -85,6 +85,7 @@ struct nfs4_ff_layout_mirror {
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struct nfs4_ff_layoutstat write_stat;
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ktime_t start_time;
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ktime_t last_report_time;
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u32 report_interval;
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};
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struct nfs4_ff_layout_segment {
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