Re: [PATCH v4 11/25] ibtrs: server: statistics functions

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On Wed, Oct 2, 2019 at 5:42 PM Leon Romanovsky <leon@xxxxxxxxxx> wrote:
>
> On Wed, Oct 02, 2019 at 05:15:10PM +0200, Jinpu Wang wrote:
> > On Tue, Sep 24, 2019 at 1:56 AM Bart Van Assche <bvanassche@xxxxxxx> wrote:
> > >
> > > On 6/20/19 8:03 AM, Jack Wang wrote:
> > > > +ssize_t ibtrs_srv_stats_rdma_to_str(struct ibtrs_srv_stats *stats,
> > > > +                                 char *page, size_t len)
> > > > +{
> > > > +     struct ibtrs_srv_stats_rdma_stats *r = &stats->rdma_stats;
> > > > +     struct ibtrs_srv_sess *sess;
> > > > +
> > > > +     sess = container_of(stats, typeof(*sess), stats);
> > > > +
> > > > +     return scnprintf(page, len, "%lld %lld %lld %lld %u\n",
> > > > +                      (s64)atomic64_read(&r->dir[READ].cnt),
> > > > +                      (s64)atomic64_read(&r->dir[READ].size_total),
> > > > +                      (s64)atomic64_read(&r->dir[WRITE].cnt),
> > > > +                      (s64)atomic64_read(&r->dir[WRITE].size_total),
> > > > +                      atomic_read(&sess->ids_inflight));
> > > > +}
> > >
> > > Does this follow the sysfs one-value-per-file rule? See also
> > > Documentation/filesystems/sysfs.txt.
> > >
> > > Thanks,
> > >
> > > Bart.
> > It looks overkill to create one file for each value to me, and there
> > are enough stats in sysfs contain multiple values.
>
> Not for statistics.
2 examples:
cat /sys/block/nvme0n1/inflight
       0        0
cat /sys/block/nvme0n1/stat
 1267566       53 85396638   927624  4790532  3076340 198306930
19413605        0  2459788 17013620    74392        0 397606816
6864

Thanks



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