Re: terse output for IO latencies

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On Mon, Dec 1, 2008 at 11:45 AM, Baur, Eric <Eric.Baur@xxxxxx> wrote:
> In the HOWTO for fio, the terse output for IO latencies is described as:
>
> "IO latencies: <=2, 4, 10, 20, 50, 100, 250, 500, 750, 1000, >=2000"
>
> Output from certain test runs have been observed to have more than 11
> values for IO latencies, For example:
>
> 0.01%, 0.00%, 0.01%, 0.01%, 0.06%, 0.73%, 35.42%, 7.19%, 3.03%, 0.52%,
> 2.79%, 13.67%, 32.84%, 2.86%, 0.84%, 0.02%, 0.01%, 0.00%, 0.00%, 0.00%,
> 0.00%, 0.00%
>
> What are the proper labels for this output?
>
> Thanks,
> Eric
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I had a similar question last week (not sure if the message got eaten
by the server or by the holiday here in the states).  From what my
very rusty C skills and the source tell me, it appears the terse
output gives the same values as the regular output.  The only
difference being that the terse output cannot skip the brackets that
have no hits.  So I believe the values can be derived from this block
of code from the source:

static void show_lat_u(double *io_u_lat_u)
{
        const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
                                 "250=", "500=", "750=", "1000=", };

        show_lat(io_u_lat_u, FIO_IO_U_LAT_U_NR, ranges, "usec");
}

static void show_lat_m(double *io_u_lat_m)
{
        const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
                                 "250=", "500=", "750=", "1000=", "2000=",
                                 ">=2000=", };

In which case, the documentation should probably be updated to reflect
that. Can anyone familiar with the code confirm this?

Daniel
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