https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #8 from Sylvain Galliano <s...@efficientip.com> --- After looking at iflib_netmap_timer_adjust() & iflib_netmap_txsync() in sys/net/iflib.c, I made some tuning on kern.hz: Still using X520 with 1 queue ix0: PCI Express Bus: Speed 5.0GT/s Width x8 ix0: netmap queues/slots: TX 1/2048, RX 1/2048 ***************** /boot/loader.conf: kern.hz=1000 (default) pkt-gen result: 204.153802 main_thread [2639] 2.562 Mpps (2.567 Mpkts 1.230 Gbps in 1001994 usec) 465.32 avg_batch 99999 min_space 205.155321 main_thread [2639] 2.561 Mpps (2.565 Mpkts 1.229 Gbps in 1001519 usec) 465.45 avg_batch 99999 min_space 5500 irq/s: ***************** /boot/loader.conf: kern.hz=1999 pkt-gen result: 41.375049 main_thread [2639] 5.117 Mpps (5.222 Mpkts 2.456 Gbps in 1020510 usec) 465.45 avg_batch 99999 min_space 42.375546 main_thread [2639] 5.118 Mpps (5.121 Mpkts 2.457 Gbps in 1000497 usec) 465.42 avg_batch 99999 min_space 11000 irq/s X2 performance & irq/s ***************** /boot/loader.conf: kern.hz=2000 pkt-gen result: 797.608080 main_thread [2639] 2.560 Mpps (2.563 Mpkts 1.229 Gbps in 1001001 usec) 465.50 avg_batch 99999 min_space 798.609079 main_thread [2639] 2.560 Mpps (2.563 Mpkts 1.229 Gbps in 1000999 usec) 465.41 avg_batch 99999 min_space 5500 irq/s Same performance & irq/s as kern.hz=1000 (due to limit at 2000 in iflib_netmap_timer_adjust & iflib_netmap_txsync) ***************** Last test, this one I forced 'ticks' parameter to '1' in callout_reset_on on iflib_netmap_timer_adjust & iflib_netmap_txsync by increasing the 2000 limit to 20000 in both functions and put an insame value for kern.hz /boot/loader.conf: kern.hz=10000 pkt-gen result: 345.415939 main_thread [2639] 14.880 Mpps (14.890 Mpkts 7.142 Gbps in 1000699 usec) 430.97 avg_batch 99999 min_space 346.429134 main_thread [2639] 14.880 Mpps (15.076 Mpkts 7.142 Gbps in 1013196 usec) 432.17 avg_batch 99999 min_space 29000 irq/s Same performance as FreeBSD 11 Looks like callout_reset_on to iflib_timer have a look high delay. -- You are receiving this mail because: You are the assignee for the bug. You are on the CC list for the bug. _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
