How do I retrieve DPAA1 / fman statistics ?

[timkordas]

I'm running linux 4.14.16 on an ls1043a. I recently enabled a DPAA configuration (via the fmc command with appropriate policy and configurations). For some cases, I see an improvement in packet forwarding throughput (and a corresponding reduction in out-of-order packet delivery). How can I get more statistics out of the frame-manager / queue-manager ?

Ideally, I'd like to be able to see a counter of how many frames get assigned to queues based on the classification in the policy (preferably broken down by queue ?).

I've looked at the stuff in /sys/kernel/debug/qman/fqd (and documented in the QorIQ SDK); but maybe I've missed something.

I'd even just like a boolean flag "DPAA got a config from FMC." I'm sure I must be missing something.

My impression is that changing the fmc/dpaa1 configuration during operation is either unsupported or is not-recommended ? Is that true ?

[yipingwang]

Hello Tim Kordas,

No method to get statistics information from /sys/kernel/debug.

You could refer to USDPAA source code.

static int dump_match_table_entry_stats(t_Handle ccnode, int entry_idx)
{
        t_Error err;
        t_FmPcdCcKeyStatistics stats;

        err = FM_PCD_MatchTableGetKeyStatistics(
                ccnode,
                entry_idx,
                &stats);
        if (err != E_OK) {
                printf("\t- entry #%d : FAILED TO GET STATS\n", entry_idx);
                return -EINVAL;
        }

        printf("\t- entry #%d : %u frames\n", entry_idx, stats.frameCount);

        return 0;
}

Thanks,

Yiping