On 2/14/20 2:58 PM, BulkMailForRudy wrote:
pmcstat -S inst_retired.any -Tw1
I had time to run pmcstat during a larger TX load on Chelsio T6 card.
I'm loosing a hope on using FreeBSD as one of my edge routers outside of
10Gbps ports.
*Start (been running for 4 days), cc1: RX 2.3Gbps / 130Mbps*
%SAMP IMAGE FUNCTION CALLERS
20.4 kernel sched_idletd fork_exit
14.1 kernel cpu_search_highest cpu_search_highest:11.9
sched_switch:1.3 sched_idletd:0.9
5.5 kernel cpu_search_lowest cpu_search_lowest:5.0
sched_pickcpu:0.5
4.6 kernel eth_tx drain_ring
3.7 kernel rn_match fib4_lookup_nh_basic
2.0 kernel epoch_enter_preempt arpresolve
2.0 kernel mac_ifnet_check_tran ether_output
1.9 kernel lock_delay __mtx_lock_sleep
1.7 kernel service_iq_fl t4_intr
1.6 kernel ip_tryforward ip_input
1.5 kernel get_scatter_segment service_iq_fl
1.5 kernel mac_ifnet_create_mbu ether_nh_input
1.4 kernel parse_pkt cxgbe_transmit
1.3 kernel netisr_dispatch_src ether_demux:0.7 ether_input:0.6
1.3 kernel cxgbe_transmit ether_output_frame
1.2 kernel _rm_rlock in_localip
1.2 kernel mp_ring_enqueue cxgbe_transmit
1.2 kernel ether_output ip_tryforward
*5 minutes in sending more traffic out cc1, cc1: RX 2.3Gbps / TX 1.7Gbps*
%SAMP IMAGE FUNCTION CALLERS
17.0 kernel sched_idletd fork_exit
15.3 kernel cpu_search_highest cpu_search_highest:13.0
sched_switch:1.3 sched_idletd:1.0
6.9 kernel cpu_search_lowest cpu_search_lowest:6.3
sched_pickcpu:0.6
4.8 kernel eth_tx drain_ring
3.7 kernel rn_match fib4_lookup_nh_basic
2.7 kernel lock_delay __mtx_lock_sleep
2.0 kernel mac_ifnet_check_tran ether_output
1.9 kernel epoch_enter_preempt arpresolve
1.8 kernel service_iq_fl t4_intr
1.6 kernel mac_ifnet_create_mbu ether_nh_input
1.6 kernel ip_tryforward ip_input
*10 minutes in, attempting to make cc1 referred outbound for whole
network (~ 5Gbps), and the box starts dropping packets:*
PMC: [inst_retired.any] Samples: 1019841 (100.0%) , 19068 unresolved
%SAMP IMAGE FUNCTION CALLERS
24.8 kernel cpu_search_highest cpu_search_highest:22.7
sched_idletd:1.6
6.2 kernel lock_delay __mtx_lock_sleep
6.0 kernel rn_match fib4_lookup_nh_basic
5.7 kernel eth_tx drain_ring
2.7 kernel sched_idletd fork_exit
2.6 kernel tdq_move sched_idletd
2.5 kernel mac_ifnet_check_tran ether_output
2.1 kernel mac_ifnet_create_mbu ether_nh_input
2.0 kernel epoch_enter_preempt arpresolve
*Reverting to ~ 150Mbps TX on cc1*
PMC: [inst_retired.any] Samples: 136053 (100.0%) , 2767 unresolved
%SAMP IMAGE FUNCTION CALLERS
27.1 kernel sched_idletd fork_exit
14.1 kernel cpu_search_highest cpu_search_highest:11.5
sched_switch:1.6 sched_idletd:0.9
4.4 kernel cpu_search_lowest cpu_search_lowest
4.1 kernel eth_tx drain_ring
3.4 kernel rn_match fib4_lookup_nh_basic
1.8 kernel epoch_enter_preempt arpresolve
1.8 kernel mac_ifnet_check_tran ether_output
1.6 kernel service_iq_fl t4_intr
1.4 kernel ip_tryforward ip_input
1.4 kernel get_scatter_segment service_iq_fl
1.3 kernel mac_ifnet_create_mbu ether_nh_input
1.3 kernel sched_switch mi_switch
1.3 kernel parse_pkt cxgbe_transmit
1.2 kernel _rm_rlock in_localip
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