K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2021-01-20T14:45:55.581647Z
K 7
svn:log
V 1695
pf: Convert pfi_kkif to use counter_u64

Improve caching behaviour by using counter_u64 rather than variables
shared between cores.

The result of converting all counters to counter(9) (i.e. this full
patch series) is a significant improvement in throughput. As tested by
olivier@, on Intel Xeon E5-2697Av4 (16Cores, 32 threads) hardware with
Mellanox ConnectX-4 MCX416A-CCAT (100GBase-SR4) nics we see:

x FreeBSD 20201223: inet packets-per-second
+ FreeBSD 20201223 with pf patches: inet packets-per-second
+--------------------------------------------------------------------------+
|                                                                        + |
| xx                                                                     + |
|xxx                                                                    +++|
||A|                                                                       |
|                                                                       |A||
+--------------------------------------------------------------------------+
    N           Min           Max        Median           Avg        Stddev
x   5       9216962       9526356       9343902     9371057.6     116720.36
+   5      19427190      19698400      19502922      19546509     109084.92
Difference at 95.0% confidence
        1.01755e+07 +/- 164756
        108.584% +/- 2.9359%
        (Student's t, pooled s = 112967)

Reviewed by:	philip
MFC after:	2 weeks
Sponsored by:	Orange Business Services
Differential Revision:	https://reviews.freebsd.org/D27763

(cherry picked from commit 5a3b9507d784aaa6a7ce35432b2111a7eec12cba)

Git Hash:   efd9d47d0b358c829bfc12fda2cc5826e73e5974
Git Author: kp@FreeBSD.org
END