New PPPoE backend, some feedback

stephenw10

How are you testing? What hardware are you running?

The upload speed is also unchanged from mpd5?

dsl.ottawa

I'm running a Supermicro E300-8D with a Xeon D-1518 CPU and 16gig of Ram.
The onboard 10gig nic's are Lagg'd in to my lan and the addon slot is filled with currently an X710 but initially I had tried a X520.

The switch from mpd5 made very little if any difference. Maybe 100mbps if that.

I'm testing from my pc which has 10gig fiber into my core switch and then the pfsense box is fed by the mentioned 10gig LAGG group.

When I run the speed test right from the modem itself using he provider interface it comes back with 3.2gig up and down every time. When running it from my pc I'm using the providers speed test site. Upload is always 3-3.2gig, but the download always falls short.

The only difference I saw from going from mpd5 to the new one is the cpu usage dropped.. Previously on a test I'd see upwards of 60% cpu , now it's 38-43%. 39% on the download and upwards of 43% on the upload tests.

The only thing I haven't tried that I can think of is to remove the pppoe from pfsense and just set it up as a dhcp to the provider modem and see if I get the full speed all the way through.

The part I find odd is that if it was the pppoe , I wouldn't think I'd get full speed on the upload ? That's why I started looking at other things, like the queue's to see if I could find something off.

stephenw10

Does that speedtest use multiple connections?

The reason you see a difference between up and down is that when you're downloading Receive Side Scaling applies to the PPPoE directly and that is what limits it.

However if_pppoe is RSS enabled so should be able to spread the load across the queues/cores much better. But only if there are multiple streams to spread.

And just to be clear the WAN here was either the X520 or X710 NIC?

w0w

@dsl-ottawa
Did you remove the net.isr.dispatch=deferred? See PPPoE with multi-queue NICs

mr_nets

@w0w said in New PPPoE backend, some feedback:

@dsl-ottawa
Did you remove the net.isr.dispatch=deferred? See PPPoE with multi-queue NICs

@w0w I did remove this value, shouldn't I ? I didn't see any change without.

w0w

@mr_nets said in New PPPoE backend, some feedback:

@w0w I did remove this value, shouldn't I ? I didn't see any change without.

AFAIK it should be removed on the new backend.
Do you have any other tunes enabled, flow control, tcp segmentation offload, LRO, no?
Just guessing... I have never seen anything over 1Gig running PPPoE...

mr_nets

@w0w said in New PPPoE backend, some feedback:

@mr_nets said in New PPPoE backend, some feedback:

@w0w I did remove this value, shouldn't I ? I didn't see any change without.

AFAIK it should be removed on the new backend.
Do you have any other tunes enabled, flow control, tcp segmentation offload, LRO, no?
Just guessing... I have never seen anything over 1Gig running PPPoE...

Fine, every offload setting are disabled as well. The only thing I didn't remove is Jumbo Frame on PPPoE (MTU 1500) since my ISP support that.

stephenw10

What CPU usage are you seeing when you test? What about per core usage? I one core still pegged at 100%

dsl.ottawa

@stephenw10
The multiple connection question is one I can't really answer. All I can say is that it's my providers tester and they sell up to 8gig on residential , so I have to sort of assume that it would take multiple streams into account. There is a comment on their page that mentions Ookla and Speedtest so there may be a linkage to them for the testing. It's an interesting thought though. Is there a known good tester that would be a good one to use to test against ? I'm betting it's going to be hard to get a full pipe test across the internet.

Yup I've tried both cards for the WAN side of the connection.

I've even thought that maybe the problem is on the PFSENSE side be elsewhere, like what if it's my desktop that is having the issue (long shot but the reality is that it is a device in the chain of the test)

dsl.ottawa

@w0w
I double checked and yup currently it is not there.
so in my tunables side here are the ones I think I have changed (some have been there for a while to help the 10gig on the LAN side and general performance). and Some where attempts to fix this issue. I'm certainly not an expert when it comes to tuning so it's very possible that something is messed up.

kern.ipc.somaxconn 4096
hw.ix.tx_process_limit -1
hw.ix.rx_process_limit -1
hw.ix.rxd 4096
hw.ix.txd 4096
hw.ix.flow_control 0
hw.intr_storm_threshold 10000
net.isr.bindthreads 1
net.isr.maxthreads 8
net.inet.rss.enabled 1
net.inet.rss.bits 2
net.inet.ip.intr_queue_maxlen 4000
net.isr.numthreads 8
hw.ixl.tx_process_limit -1
hw.ixl.rx_process_limit -1
hw.ixl.rxd 4096
hw.ixl.rxd 4096
dev.ixl.0.fc 0
dev.ixl.1.fc 0

and in my boot local file

net.inet.tcp.lro="0"
hw.ixl.flow_control="0"
hw.ix1.num_queues="8"
dev.ixl.0.iflib.override_qs_enable=1
dev.ixl.0.iflib.override_nrxqs=8
dev.ixl.0.iflib.override_ntxqs=8
dev.ixl.1.iflib.override_qs_enable=1
dev.ixl.1.iflib.override_nrxqs=8
dev.ixl.1.iflib.override_ntxqs=8
dev.ixl.0.iflib.override_nrxds=4096
dev.ixl.0.iflib.override_ntxds=4096
dev.ixl.1.iflib.override_nrxds=4096
dev.ixl.1.iflib.override_ntxds=4096

And in the netowrk interface side

TCP Segmentaion offloading, Large Receive and of course use if_pppoe are checked.

more than 1gig pppoe, I'm not sure where in the world uses it but in Canada, they seem to love their PPPOE, we can get it up to 8gig from one of the providers. Honestly I still miss the old PVC based ATM connections, no special configuration from the users perspective it's just a pipe and it worked lol. I know the reason they use PPPOE it's just in cases like this it's extra overhead to deal with.

stephenw10

Yeah, if it's ookla it's almost certainly multistream. Also at those speeds it would probably need to be.

I'm not sure I can recommend anything other than the ISPs test at that speed either. Anything that was routed further may be restricted there.

But check the per-core CPU usage. Is it just hitting a single core limit?

dsl.ottawa

@stephenw10
the per core load doesn't seem to be an issue, which would mean that the new backend is doing it's job. I captured this in the middle of the download test.

CPU 0: 9.4% user, 0.0% nice, 43.1% system, 0.0% interrupt, 47.5% idle
CPU 1: 7.8% user, 0.0% nice, 1.6% system, 18.0% interrupt, 72.5% idle
CPU 2: 3.9% user, 0.0% nice, 3.1% system, 45.9% interrupt, 47.1% idle
CPU 3: 6.7% user, 0.0% nice, 3.5% system, 14.5% interrupt, 75.3% idle
CPU 4: 4.7% user, 0.0% nice, 14.5% system, 27.1% interrupt, 53.7% idle
CPU 5: 20.4% user, 0.0% nice, 7.1% system, 0.8% interrupt, 71.8% idle
CPU 6: 12.9% user, 0.0% nice, 28.6% system, 0.4% interrupt, 58.0% idle
CPU 7: 5.1% user, 0.0% nice, 2.7% system, 27.8% interrupt, 64.3% idle

stephenw10

Hmm, yeah that looks fine. Yet you still see all the traffic on one receive queue?

w0w

Just FYI, some parameters used on one of my firewall with X710 and Xeon(R) CPU E3-1285L v4 :

net.inet.rss.bucket_mapping: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 8:0 9:1 10:2 11:3 12:4 13:5 14:6 15:7
net.inet.rss.debug: 0
net.inet.rss.basecpu: 0
net.inet.rss.buckets: 16
net.inet.rss.maxcpus: 64
net.inet.rss.ncpus: 8
net.inet.rss.maxbits: 7
net.inet.rss.mask: 15
net.inet.rss.bits: 4
net.inet.rss.hashalgo: 2
hw.ixl.flow_control: 0
hw.ixl.tx_itr: 122
hw.ixl.rx_itr: 62
hw.ixl.shared_debug_mask: 0
hw.ixl.core_debug_mask: 0
hw.ixl.enable_head_writeback: 1
hw.ixl.enable_vf_loopback: 1
hw.ixl.i2c_access_method: 0
dev.ixl.0.wake: 0
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dev.ixl.0.mac.xon_recvd: 0
dev.ixl.0.mac.xon_txd: 0
dev.ixl.0.mac.tx_frames_big: 0
dev.ixl.0.mac.tx_frames_1024_1522: 21680695
dev.ixl.0.mac.tx_frames_512_1023: 14381471
dev.ixl.0.mac.tx_frames_256_511: 420044
dev.ixl.0.mac.tx_frames_128_255: 1330792
dev.ixl.0.mac.tx_frames_65_127: 2233359
dev.ixl.0.mac.tx_frames_64: 94083
dev.ixl.0.mac.checksum_errors: 0
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dev.ixl.0.mac.rx_frames_1024_1522: 837784
dev.ixl.0.mac.rx_frames_512_1023: 105087
dev.ixl.0.mac.rx_frames_256_511: 526010
dev.ixl.0.mac.rx_frames_128_255: 801107
dev.ixl.0.mac.rx_frames_65_127: 17592164
dev.ixl.0.mac.rx_frames_64: 96374
dev.ixl.0.mac.rx_length_errors: 0
dev.ixl.0.mac.remote_faults: 0
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dev.ixl.0.mac.bcast_pkts_txd: 25
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dev.ixl.0.mac.ucast_pkts_txd: 40138797
dev.ixl.0.mac.good_octets_txd: 39093159271
dev.ixl.0.mac.rx_discards: 0
dev.ixl.0.mac.bcast_pkts_rcvd: 2970
dev.ixl.0.mac.mcast_pkts_rcvd: 13177
dev.ixl.0.mac.ucast_pkts_rcvd: 19942379
dev.ixl.0.mac.good_octets_rcvd: 2847966747
dev.ixl.0.pf.txq03.itr: 122
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dev.ixl.0.pf.txq01.itr: 122
dev.ixl.0.pf.txq01.bytes: 18307072164
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dev.ixl.0.pf.rxq02.irqs: 2243131
dev.ixl.0.pf.rxq01.itr: 62
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dev.ixl.0.pf.rxq01.bytes: 0
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dev.ixl.0.pf.rxq01.irqs: 5679657
dev.ixl.0.pf.rxq00.itr: 62
dev.ixl.0.pf.rxq00.desc_err: 0
dev.ixl.0.pf.rxq00.bytes: 2766924779
dev.ixl.0.pf.rxq00.packets: 19948205
dev.ixl.0.pf.rxq00.irqs: 13195725
dev.ixl.0.pf.rx_errors: 0
dev.ixl.0.pf.bcast_pkts_txd: 25
dev.ixl.0.pf.mcast_pkts_txd: 281474976710649
dev.ixl.0.pf.ucast_pkts_txd: 40138797
dev.ixl.0.pf.good_octets_txd: 38931601458
dev.ixl.0.pf.rx_discards: 4294966174
dev.ixl.0.pf.bcast_pkts_rcvd: 2970
dev.ixl.0.pf.mcast_pkts_rcvd: 791
dev.ixl.0.pf.ucast_pkts_rcvd: 19941980
dev.ixl.0.pf.good_octets_rcvd: 2846521088
dev.ixl.0.admin_irq: 3
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dev.ixl.0.eee.rx_lpi_count: 0
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dev.ixl.0.fw_version: fw 9.820.73026 api 1.15 nvm 9.20 etid 8000d966 oem 22.5632.9
dev.ixl.0.current_speed: 10 Gbps
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dev.ixl.0.iflib.rxq1.rxq_fl0.pidx: 128
dev.ixl.0.iflib.rxq1.cpu: 2
dev.ixl.0.iflib.rxq0.rxq_fl0.buf_size: 2048
dev.ixl.0.iflib.rxq0.rxq_fl0.credits: 1023
dev.ixl.0.iflib.rxq0.rxq_fl0.cidx: 685
dev.ixl.0.iflib.rxq0.rxq_fl0.pidx: 684
dev.ixl.0.iflib.rxq0.cpu: 0
dev.ixl.0.iflib.txq3.r_abdications: 0
dev.ixl.0.iflib.txq3.r_restarts: 0
dev.ixl.0.iflib.txq3.r_stalls: 0
dev.ixl.0.iflib.txq3.r_starts: 5719770
dev.ixl.0.iflib.txq3.r_drops: 0
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dev.ixl.0.iflib.txq3.ring_state: pidx_head: 1123 pidx_tail: 1123 cidx: 1123 state: IDLE
dev.ixl.0.iflib.txq3.txq_cleaned: 10975024
dev.ixl.0.iflib.txq3.txq_processed: 10975032
dev.ixl.0.iflib.txq3.txq_in_use: 9
dev.ixl.0.iflib.txq3.txq_cidx_processed: 824
dev.ixl.0.iflib.txq3.txq_cidx: 816
dev.ixl.0.iflib.txq3.txq_pidx: 825
dev.ixl.0.iflib.txq3.no_tx_dma_setup: 0
dev.ixl.0.iflib.txq3.txd_encap_efbig: 0
dev.ixl.0.iflib.txq3.tx_map_failed: 0
dev.ixl.0.iflib.txq3.no_desc_avail: 0
dev.ixl.0.iflib.txq3.mbuf_defrag_failed: 0
dev.ixl.0.iflib.txq3.m_pullups: 4578827
dev.ixl.0.iflib.txq3.mbuf_defrag: 0
dev.ixl.0.iflib.txq3.cpu: 6
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dev.ixl.0.iflib.txq2.txq_cidx: 220
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dev.ixl.0.iflib.txq1.txq_in_use: 9
dev.ixl.0.iflib.txq1.txq_cidx_processed: 541
dev.ixl.0.iflib.txq1.txq_cidx: 533
dev.ixl.0.iflib.txq1.txq_pidx: 542
dev.ixl.0.iflib.txq1.no_tx_dma_setup: 0
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dev.ixl.0.iflib.txq1.mbuf_defrag_failed: 0
dev.ixl.0.iflib.txq1.m_pullups: 17863485
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dev.ixl.0.iflib.txq1.cpu: 2
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dev.ixl.0.iflib.txq0.r_restarts: 0
dev.ixl.0.iflib.txq0.r_stalls: 0
dev.ixl.0.iflib.txq0.r_starts: 5665998
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dev.ixl.0.iflib.txq0.r_enqueues: 5676493
dev.ixl.0.iflib.txq0.ring_state: pidx_head: 1485 pidx_tail: 1485 cidx: 1485 state: IDLE
dev.ixl.0.iflib.txq0.txq_cleaned: 10681309
dev.ixl.0.iflib.txq0.txq_processed: 10681317
dev.ixl.0.iflib.txq0.txq_in_use: 8
dev.ixl.0.iflib.txq0.txq_cidx_processed: 997
dev.ixl.0.iflib.txq0.txq_cidx: 989
dev.ixl.0.iflib.txq0.txq_pidx: 997
dev.ixl.0.iflib.txq0.no_tx_dma_setup: 0
dev.ixl.0.iflib.txq0.txd_encap_efbig: 0
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dev.ixl.0.iflib.txq0.m_pullups: 5253756
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dev.ixl.0.iflib.txq0.cpu: 0
dev.ixl.0.iflib.override_nrxds: 0
dev.ixl.0.iflib.override_ntxds: 0
dev.ixl.0.iflib.allocated_msix_vectors: 5
dev.ixl.0.iflib.use_extra_msix_vectors: 0
dev.ixl.0.iflib.use_logical_cores: 0
dev.ixl.0.iflib.separate_txrx: 0
dev.ixl.0.iflib.core_offset: 0
dev.ixl.0.iflib.tx_abdicate: 0
dev.ixl.0.iflib.rx_budget: 0
dev.ixl.0.iflib.disable_msix: 0
dev.ixl.0.iflib.override_qs_enable: 0
dev.ixl.0.iflib.override_nrxqs: 0
dev.ixl.0.iflib.override_ntxqs: 0
dev.ixl.0.iflib.driver_version: 2.3.3-k
dev.ixl.0.%iommu: rid=0x100
dev.ixl.0.%parent: pci1
dev.ixl.0.%pnpinfo: vendor=0x8086 device=0x15ff subvendor=0x8086 subdevice=0x0006 class=0x020000
dev.ixl.0.%location: slot=0 function=0 dbsf=pci0:1:0:0 handle=\_SB_.PCI0.PEG0.PEGP
dev.ixl.0.%driver: ixl
dev.ixl.0.%desc: Intel(R) Ethernet Controller X710 for 10GBASE-T - 2.3.3-k
dev.ixl.%parent:
ixl0@pci0:1:0:0:	class=0x020000 rev=0x02 hdr=0x00 vendor=0x8086 device=0x15ff subvendor=0x8086 subdevice=0x0006
    vendor     = 'Intel Corporation'
    device     = 'Ethernet Controller X710 for 10GBASE-T'
    class      = network
    subclass   = ethernet
    bar   [10] = type Prefetchable Memory, range 64, base 0xfbe000000, size 16777216, enabled
    bar   [1c] = type Prefetchable Memory, range 64, base 0xfbf018000, size 32768, enabled
    cap 01[40] = powerspec 3  supports D0 D3  current D0
    cap 05[50] = MSI supports 1 message, 64 bit, vector masks
    cap 11[70] = MSI-X supports 129 messages, enabled
                 Table in map 0x1c[0x0], PBA in map 0x1c[0x1000]
    cap 10[a0] = PCI-Express 2 endpoint max data 128(2048) FLR
                 max read 512
                 link x8(x8) speed 8.0(8.0) ASPM L1(L1)
    cap 03[e0] = VPD
    ecap 0001[100] = AER 2 0 fatal 0 non-fatal 1 corrected
    ecap 0003[140] = Serial 1 8477c9ffff9196b4
    ecap 000e[150] = ARI 1
    ecap 0010[160] = SR-IOV 1 IOV disabled, Memory Space disabled, ARI disabled
                     0 VFs configured out of 32 supported
                     First VF RID Offset 0x0110, VF RID Stride 0x0001
                     VF Device ID 0x154c
                     Page Sizes: 4096 (enabled), 8192, 65536, 262144, 1048576, 4194304
    ecap 0017[1a0] = TPH Requester 1
    ecap 000d[1b0] = ACS 1 Source Validation unavailable, Translation Blocking unavailable
                     P2P Req Redirect unavailable, P2P Cmpl Redirect unavailable
                     P2P Upstream Forwarding unavailable, P2P Egress Control unavailable
                     P2P Direct Translated unavailable, Enhanced Capability unavailable
    ecap 0019[1d0] = PCIe Sec 1 lane errors 0

@dsl-ottawa
Is there a way to test pfSense WAN to LAN throughput without using PPPoE?
I don’t remember exactly what I set up back then, but it was something like an iPerf server on the WAN side (hooked to 10Gbit switch) with a 10 Gbit interface — and of course, the same on the LAN side, but client...

dsl.ottawa

@stephenw10 Yup yup

dev.ixl.0.pf.txq07.packets: 8401098
dev.ixl.0.pf.txq06.packets: 7316577
dev.ixl.0.pf.txq05.packets: 3704542
dev.ixl.0.pf.txq04.packets: 4271522
dev.ixl.0.pf.txq03.packets: 3784653
dev.ixl.0.pf.txq02.packets: 7219027
dev.ixl.0.pf.txq01.packets: 4471821
dev.ixl.0.pf.txq00.packets: 2694355
dev.ixl.0.pf.rxq07.packets: 0
dev.ixl.0.pf.rxq06.packets: 0
dev.ixl.0.pf.rxq05.packets: 0
dev.ixl.0.pf.rxq04.packets: 0
dev.ixl.0.pf.rxq03.packets: 0
dev.ixl.0.pf.rxq02.packets: 0
dev.ixl.0.pf.rxq01.packets: 0
dev.ixl.0.pf.rxq00.packets: 47313613

dsl.ottawa

@w0w Thanks for this I'll do some comparisons and see if there is something different.

What I might do this weekend, is push the pppoe back up to the provider modem and just run it as dhcp from there. I know it will be double NAT but if it's something between the PPPOE and the queuing that should then clear up. If I get better results and the queues are better then it narrows it down, and proves the rest of my network. I had already ran iperf between other devices and the firewall when I upgraded servers and switches to 10gig to try and tune everything, so it shouldn't be but I don't want to discount it without some proof either.

dsl.ottawa

@w0w Taking into account that I have 4 more queues than you did here's what I see are differences.

dev.ixl.0.eee.enable: 0
dev.ixl.0.unallocated_queues: 760 <- makes sense I have more queues enabled.
dev.ixl.0.fw_version: fw 6.81.49447 api 1.7 nvm 6.80 etid 80003d72 oem 18.4608.9
dev.ixl.0.supported_speeds: 6 <- probably due to the firmware difference.
dev.ixl.0.advertise_speed: 6 <- probably due to the firmware difference.
dev.ixl.0.iflib.override_nrxds: 4096 <-these are in my overrides so expected.
dev.ixl.0.iflib.override_ntxds: 4096 <-these are in my overrides so expected.
dev.ixl.0.iflib.allocated_msix_vectors: 9
dev.ixl.0.iflib.override_qs_enable: 1
dev.ixl.0.iflib.override_nrxqs: 8 <-related to my extra queue tests.
dev.ixl.0.iflib.override_ntxqs: 8 <-related to my extra queue tests.

so
a) I could try updating the firmware, never a bad thing
b) unsure about the
dev.ixl.0.eee.enable: 0
dev.ixl.0.iflib.allocated_msix_vectors: 9
dev.ixl.0.iflib.override_qs_enable: 1
and
c)Your queue outputs show that on the RX side only the one queue was active on yours too.

mr_nets

@stephenw10 said in New PPPoE backend, some feedback:

What CPU usage are you seeing when you test? What about per core usage? I one core still pegged at 100%

Netgate 6100

Internet: 1G(1200 Mb/s) Down / 1G Up

3x Stream 4K 60FPS on 3 device
2x Download using Steam on 2 device
1x OpenVPN session open on the router but not very busy
2x Speed test (spot where it reach 1 gig) on 1 device

This is what it's look like in Grafana Cloud , it's not the most accurate I've seen but it's really close (I saw some spike at 80% for cpu 0 system on top "top -P" during the speed test ). What we can observe is that cpu 0 still very busy compare to the other cpu.

w0w

@dsl-ottawa said in New PPPoE backend, some feedback:

a) I could try updating the firmware, never a bad thing
b) unsure about the
dev.ixl.0.eee.enable: 0
dev.ixl.0.iflib.allocated_msix_vectors: 9
dev.ixl.0.iflib.override_qs_enable: 1
and
c)Your queue outputs show that on the RX side only the one queue was active on yours too.

I don't think those parameters are related to the problem — they seem like some OEM firmware/CPU settings, maybe.
And about the queue... That’s a good find! I didn’t pay attention to it before. Hmm, interesting...
I have a gigabit PPPoE connection, and the new backend gives me slightly better speeds compared to MPD5 with the deferred option. It almost saturates my ISP’s Ethernet link — over 900 Mbps — which I think is a great result for 20-year-old Cat5 cabling.

dsl.ottawa

@w0w I would agree nothing there in the settings..

BUT I found some more info.. and I should have kept to my gut feeling and done the further tests before pinpointing the PPPOE.

I disabled my pppoe and ran straight IP, to my provider modem, so double nat'd.

All the queues were used. as expected.
my desktop speed tests DIDNT CHANGE, still slow downloads
I found a copy of the cli speedtest package for pfsense and installed it.
- download test from the pfsense box came back at full 3gig
- upload was slower than normal but I'm less worried about that since my desktop tests were fine
put PPPOE back, and ran the same tests.
- download 3gig from pfsense using speedtest-cli
- and normal 1.7-1.9 on my desktop

This to me proves that it's not the PPPOE or even the wan side of pfsense but something on my bleepin LAN, or at a minimum the LAN side of pfsense.

On the up side it does seem to prove that the single queue on the download isn't an issue :)