Date: Tue, 18 Oct 2022 15:16:00 -0400 From: mike tancsa <mike@sentex.net> To: Freebsd performance <freebsd-performance@freebsd.org> Subject: Chelsio Forwarding performance and RELENG_13 vs RELENG_12 Message-ID: <7b86e3fe-62e4-7b3e-f4bf-30e4894db9db@sentex.net>
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I updated a RELENG_12 router along with the hardware to RELENG_13 (oct 14th kernel) and was surprised to see an increase in dev.cxl.0.stats.rx_ovflow0 at a somewhat faster rate than I was seeing on the older slightly slower hardware under about the same load. (Xeon(R) E-2226G CPU @ 3.40GHz) vs a 4 core Xeon same freq, same memory speed. About 150Kpps in and out and a 1Gb/s throughput loader.conf is the same hw.cxgbe.toecaps_allowed="0" hw.cxgbe.rdmacaps_allowed="0" hw.cxgbe.iscsicaps_allowed="0" hw.cxgbe.fcoecaps_allowed="0" hw.cxgbe.pause_settings="0" hw.cxgbe.attack_filter="1" hw.cxgbe.drop_pkts_with_l3_errors="1" As there is a large routing table, I do have [fib_algo] inet.0 (radix4_lockless#46) rebuild_fd_flm: switching algo to radix4 [fib_algo] inet6.0 (radix6_lockless#58) rebuild_fd_flm: switching algo to radix6 kicking in. and sysctl.conf net.route.multipath=0 net.inet.ip.redirect=0 net.inet6.ip6.redirect=0 kern.ipc.maxsockbuf=16777216 net.inet.tcp.blackhole=1 Are there any other tweaks that can be done in order to better forwarding performance ? I do see at bootup time cxl0: nrxq (6), hw RSS table size (128); expect uneven traffic distribution. cxl1: nrxq (6), hw RSS table size (128); expect uneven traffic distribution. cxl3: nrxq (6), hw RSS table size (128); expect uneven traffic distribution. The cpu is 6 core. No HT enabled real memory = 34359738368 (32768 MB) avail memory = 33238708224 (31698 MB) Event timer "LAPIC" quality 600 ACPI APIC Table: < > FreeBSD/SMP: Multiprocessor System Detected: 6 CPUs FreeBSD/SMP: 1 package(s) x 6 core(s) random: registering fast source Intel Secure Key RNG just a handful of ipfw rules (no states) that were the same as before and a dozen or so cxgbe firewall rules in the NIC Anything I can try / look at that might be causing the odd overflow on cxl0 ? Its a T540-CR with 3 ports in use. t5nex0@pci0:2:0:4: class=0x020000 rev=0x00 hdr=0x00 vendor=0x1425 device=0x5403 subvendor=0x1425 subdevice=0x0000 vendor = 'Chelsio Communications Inc' device = 'T540-CR Unified Wire Ethernet Controller' class = network subclass = ethernet bar [10] = type Memory, range 64, base 0x91300000, size 524288, enabled bar [18] = type Memory, range 64, base 0x90000000, size 16777216, enabled bar [20] = type Memory, range 64, base 0x91984000, size 8192, enabled cap 01[40] = powerspec 3 supports D0 D3 current D0 cap 05[50] = MSI supports 32 messages, 64 bit, vector masks cap 10[70] = PCI-Express 2 endpoint max data 256(2048) FLR max read 4096 link x8(x8) speed 8.0(8.0) ASPM L0s/L1(L0s/L1) cap 11[b0] = MSI-X supports 128 messages, enabled Table in map 0x20[0x0], PBA in map 0x20[0x1000] cap 03[d0] = VPD ecap 0001[100] = AER 2 0 fatal 0 non-fatal 5 corrected ecap 0003[170] = Serial 1 0000000000000000 ecap 000e[190] = ARI 1 ecap 0019[1a0] = PCIe Sec 1 lane errors 0 ecap 0010[1c0] = SR-IOV 1 IOV disabled, Memory Space disabled, ARI disabled 0 VFs configured out of 0 supported First VF RID Offset 0x0008, VF RID Stride 0x0004 VF Device ID 0x5803 Page Sizes: 4096 (enabled), 8192, 65536, 262144, 1048576, 4194304 ecap 0017[200] = TPH Requester 1 Thanks for any suggestions ---Mike
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