[OpenWrt-Devel] ath9k: fix dynack in IBSS mode
Joe Ayers
joe at ayerscasa.com
Mon Jun 3 19:41:34 EDT 2019
On Thu, Apr 4, 2019 at 12:20 AM Lorenzo Bianconi
<lorenzo.bianconi at redhat.com> wrote:
>
> > On Wed, Apr 3, 2019 at 7:40 AM Lorenzo Bianconi
> > <lorenzo.bianconi at redhat.com> wrote:
> > >
> > > >
> > > > On Tue, Apr 2, 2019 at 11:45 PM Lorenzo Bianconi
> > > > <lorenzo.bianconi at redhat.com> wrote:
> > > > >
> > > > > >
> > > > > > On Sun, Mar 31, 2019 at 11:49 PM Lorenzo Bianconi
> > > > > > <lorenzo.bianconi at redhat.com> wrote:
> > > > > > >
> > > > > > > >
> > > > > > > > On Sun, Mar 31, 2019 at 12:15 PM Lorenzo Bianconi
> > > > > > > > <lorenzo.bianconi at redhat.com> wrote:
> > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > On Sun, Mar 31, 2019 at 6:45 AM Lorenzo Bianconi
> > > > > > > > > > <lorenzo.bianconi at redhat.com> wrote:
> > > > > > > > > > >
> > > > > > > > > > > >
> > > > > > > > > > > > bump.
> > > > > > > > > > >
> > > > > > > > > > > Hi Joe,
> > > > > > > > > > >
> > > > > > > > > > > sorry for the delay
> > > > > > > > > > >
> > > > > > > > > > > >
> > > > > > > > > > > > On Mon, Mar 18, 2019 at 10:59 PM Joe Ayers <joe at ayerscasa.com> wrote:
> > > > > > > > > > > >>
> > > > > > > > > > > >> Lorenzo, I have tested dynack on a (real distance apart) ~60km link
> > > > > > > > > > > >> with some success. This is the code change made:
> > > > > > > > > > > >>
> > > > > > > > > > > >> --- a/drivers/net/wireless/ath/ath9k/dynack.c
> > > > > > > > > > > >> +++ b/drivers/net/wireless/ath/ath9k/dynack.c
> > > > > > > > > > > >> @@ -20,8 +20,9 @@
> > > > > > > > > > > >>
> > > > > > > > > > > >> #define COMPUTE_TO (5 * HZ)
> > > > > > > > > > > >> #define LATEACK_DELAY (10 * HZ)
> > > > > > > > > > > >> -#define LATEACK_TO 256
> > > > > > > > > > > >> -#define MAX_DELAY 300
> > > > > > > > > > > >> +#define LATEACK_TO 1054
> > > > > > > > > > > >> +/* AREDN max distance set to 150km */
> > > > > > > > > > > >> +#define MAX_DELAY 1054
> > > > > > > > > > > >> #define EWMA_LEVEL 96
> > > > > > > > > > > >> #define EWMA_DIV 128
> > > > > > > > > > > >>
> > > > > > > > > > > >> @@ -293,7 +294,8 @@
> > > > > > > > > > > >> void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an)
> > > > > > > > > > > >> {
> > > > > > > > > > > >> /* ackto = slottime + sifs + air delay */
> > > > > > > > > > > >> - u32 ackto = 9 + 16 + 64;
> > > > > > > > > > > >> + /* AREDN starting point is 20km */
> > > > > > > > > > > >> + u32 ackto = 9 + 16 + 171;
> > > > > > > > > > > >> struct ath_dynack *da = &ah->dynack;
> > > > > > > > > > > >>
> > > > > > > > > > > >> an->ackto = ackto;
> > > > > > > > > > > >> @@ -328,7 +330,8 @@
> > > > > > > > > > > >> void ath_dynack_reset(struct ath_hw *ah)
> > > > > > > > > > > >> {
> > > > > > > > > > > >> /* ackto = slottime + sifs + air delay */
> > > > > > > > > > > >> - u32 ackto = 9 + 16 + 64;
> > > > > > > > > > > >> + /* AREDN starting point is 20km */
> > > > > > > > > > > >> + u32 ackto = 9 + 16 + 171;
> > > > > > > > > > > >> struct ath_dynack *da = &ah->dynack;
> > > > > > > > > > > >>
> > > > > > > > > > > >> da->lto = jiffies;
> > > > > > > > > > > >>
> > > > > > > > > > > >> Notes:
> > > > > > > > > > > >>
> > > > > > > > > > > >> 1) The stations are showing ack_to between 525 up to 575 A. When
> > > > > > > > > > > >> static set at 60k distance, the timeout is set to 460 S.
> > > > > > > > > > > >> 2) significant performance improvement between these settings with
> > > > > > > > > > > >> iperf3 and back to back runs with reboot in the middle:
> > > > > > > > > > > >>
> > > > > > > > > > >
> > > > > > > > > > > could you please try to attached patch? The max distance the hw can
> > > > > > > > > > > support depends of channel width:
> > > > > > > > > > > e.g @20MHz (HT20, 5GHz)
> > > > > > > > > > >
> > > > > > > > > > > max distance is ~ 61Km
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > Could these max distance specs be what the manufacture tested, not
> > > > > > > > > > necessarily a hardware limitation -- just not known?
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > > https://github.com/torvalds/linux/blob/master/drivers/net/wireless/ath/ath9k/hw.c#L1006
> > > > > > > > >
> > > > > > > > > max timeout you can set is AR_TIME_OUT_ACK (0x3fff) / clock_rate
> > > > > > > > >
> > > > > > > > > > I suspect in the calculation for max_to, if the channel is 10MHz, the
> > > > > > > > > > max distance can be doubled for the hardware--do the specs only give
> > > > > > > > > > 20MHz values? This would be consistent with, for example, the symbol
> > > > > > > > > > lengths are doubled when cutting the bandwidth in half, hence half the
> > > > > > > > > > rates and still 64 bins or 64 point fft squeezed in the channel. SNR
> > > > > > > > > > is also 3dB higher given same energy in half the bandwidth. We don't
> > > > > > > > > > see 20MHz channels working at these long distances, rather use 10MHz
> > > > > > > > > > for it to work. Intuitively, as I understand it, more time is needed
> > > > > > > > > > with increased distance for reflection signals to not be received past
> > > > > > > > > > the symbol time and increased inter-symbol interference.
> > > > > > > > >
> > > > > > > > > yes, but it is already done in ath9k_hw_set_clockrate()
> > > > > > > > > https://github.com/torvalds/linux/blob/master/drivers/net/wireless/ath/ath9k/hw.c#L61
> > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > > @Koen: do you have any chance to test the attached patch in your
> > > > > > > > > > > environment? Thx
> > > > > > > > > > >
> > > > > > > > > > > >> run 1 @ static 60km:
> > > > > > > > > > > >> [ 5] 0.00-10.00 sec 7.31 MBytes 6.13 Mbits/sec 0 sender
> > > > > > > > > > > >> [ 5] 0.00-10.08 sec 7.16 MBytes 5.95 Mbits/sec receiver
> > > > > > > > > > > >>
> > > > > > > > > > > >> run 2 @ static 60km:
> > > > > > > > > > > >> [ 5] 0.00-10.00 sec 5.88 MBytes 4.93 Mbits/sec 0 sender
> > > > > > > > > > > >> [ 5] 0.00-10.04 sec 5.77 MBytes 4.81 Mbits/sec receiver
> > > > > > > > > > > >>
> > > > > > > > > > > >> run 1 and 2 @ auto distance -- goes up to ~575us with data flow,
> > > > > > > > > > > >> floats back to ~525 otherwise:
> > > > > > > > > > > >> [ 5] 0.00-10.00 sec 20.0 MBytes 16.8 Mbits/sec 0 sender
> > > > > > > > > > > >> [ 5] 0.00-10.07 sec 19.8 MBytes 16.5 Mbits/sec receiver
> > > > > > > > > > > >>
> > > > > > > > > > > >> [ 5] 0.00-10.00 sec 21.4 MBytes 18.0 Mbits/sec 0 sender
> > > > > > > > > > > >> [ 5] 0.00-10.04 sec 21.2 MBytes 17.7 Mbits/sec receiver
> > > > > > > > > > > >>
> > > > > > > > > > > >> 3) running wpa_supplicant and psk2
> > > > > > > > > > > >> 4) running ibss on ch 176 with AREDN channels on top of 18.06.2
> > > > > > > > > > > >> 5) on one reboot, one of the stations stayed down at initial 196, then
> > > > > > > > > > > >> bumped up to ~250 range and stayed there, link not functional. Not
> > > > > > > > > > > >> sure how to explain this value...
> > > > > > > > > > > >>
> > > > > > > > > > > >> Question, can this condition be true periodically while the link is
> > > > > > > > > > > >> live or only at initial 802.11 adhoc link setup?:
> > > > > > > > > > > >>
> > > > > > > > > > > >> if (ieee80211_is_assoc_req(hdr->frame_control) ||
> > > > > > > > > > > >> ieee80211_is_assoc_resp(hdr->frame_control) ||
> > > > > > > > > > > >> ieee80211_is_auth(hdr->frame_control)) {
> > > > > > > > > > > >>
> > > > > > > > > > >
> > > > > > > > > > > I do not think so since AFAIK auth frames are sent just during ibss join
> > > > > > > > > > >
> > > > > > > > > > > >> 6) Auto distance stayed at initial 196 when turning off encryption.
> > > > > > > > > > > >>
> > > > > > > > > > > >> Any ideas of alternative options of packets to key off in late ack
> > > > > > > > > > > >> situation? running wpad-mini is ~500k file size and RAM consumer.
> > > > > > > > > > > >> It would be beneficial to take wpa_supplicant out of the equation if
> > > > > > > > > > > >> at all possible.
> > > > > > > > > > > >>
> > > > > > > > > > >
> > > > > > > > > > > What is mandatory are unicast frames during joining phase, maybe you can
> > > > > > > > > > > develop an userspace daemon for this purpose
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > I see where you're going with this. I'd have to learn a lot to do
> > > > > > > > > > this. Possibly a simpler approach, if it doesn't add too much
> > > > > > > > > > penalty. What if the initial ack_to is at max, it quickly settles
> > > > > > > > > > down to measured, then after some criteria, time or # acks received,
> > > > > > > > > > say ~15 seconds has elapsed a cycle is triggered back to max ack_to.
> > > > > > > > > > This should catch new stations joining at farther distances when wpad
> > > > > > > > > > is not used.
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > > I am a little bit concerned about short/medium distance links with high LER.
> > > > > > > > > Is the attached patch working?
> > > > > > > > >
> > > > > > > > > Regards,
> > > > > > > > > Lorenzo
> > > > > > > > >
> > > > > > > >
> > > > > > > > I did not have success on the patch on 60km link @ 10MHz channel with
> > > > > > > > encryption. I need to double-check, tomorrow, to have confidence
> > > > > > > > something wasn't overlooked. After I turned on debug, here's what
> > > > > > > > the log looked like, ack_to stayed too short (from memory) "89 A".
> > > > > > >
> > > > > > > Are you sure wpa_supplicant is running properly? I can't see any
> > > > > > > 'late_ack' in the log.
> > > > > > >
> > > > > > > Regards,
> > > > > > > Lorenzo
> > > > > > >
> > > > > >
> > > > > > OK, double checked everything and have success this time. Summary of results:
> > > > > >
> > > > > > * ~60km link is working with your code changes.
> > > > > > * The max_to in 10MHz channel is determined to be 744 (we will be
> > > > > > pushing this limit...)
> > > > > > * I probably didn't wait long enough before... Would making initial
> > > > > > ack_to = max_to solve wait time, if it doesn't cause issues for
> > > > > > short/medium distances?
> > > > > >
> > > > >
> > > > > I do not agree, it is just a way to disable 'late ack' tracking
> > > > >
> > > > > > both stations booted same time, turn on debugging, all is OK and stable
> > > > > > [ 339.340507] ath: phy0: 44:d9:e7:c0:15:4d to 520 [522]
> > > > > > [ 339.817825] ath: phy0: rx sample 299300118 [h 36-t 37]
> > > > > > [ 339.817905] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 299299549 [dur
> > > > > > 48][h 21-t 22]
> > > > > > [ 339.817923] ath: phy0: ack_ts 299300118 st_ts 299299549 st_dur 48
> > > > > > [36-21] max_to 744
> > > > > > [ 339.817959] ath: phy0: 44:d9:e7:c0:15:4d to 520 [521]
> > > > > >
> > > > > > remote sta rebooted at this point and auto distance flipped to static
> > > > > > back to auto here
> > > > > > waiting for reboot...
> > > > > > waiting even longer...
> > > > > >
> > > > >
> > > > > What do you mean with 'even longer'? How long does it take to converge
> > > > > to the correct value?
> > > > > If the delay is 600s something will not work properly.
> > > > > Is the link working every time with the patch I attached?
> > > > >
> > > > > Regards,
> > > > > Lorenzo
> > > > >
> > > >
> > > > Remote station was rebooted and last debug log of received data was [
> > > > 339.817959].
> > > > ~30 seconds to reboot, then next debug log of received data was [ 644.262302]
> > > >
> > > > The configuration is using OLSR to set routing tables. There would
> > > > not be a route for unicast IP
> > > > traffic at the timing of the 802.11n adhoc layer establishing a
> > > > connection. Then, OLSR is udp broadcasting
> > > > to discover a neighbor station, followed by an exchange of routing
> > > > information. With ~1000 route table entries,
> > > > it can take a ~minute to get all the route information settled down.
> > > > The wifi interface has static IP definition.
> > > >
> > > > I will do more testing to determine if behavior is consistent.
> > > >
> > >
> > > ack, if you confirm it works, I will post the patch
> > >
> >
> > Lorenzo, not good news. When both nodes are booted at the same
> > time, they sometime connect and ack_to correctly synced in the ~525
> > range on both sides. But there are instances where one or both sides
> > stay at "89 A", then might jump to "2xx A" and stays there. If
> > they are booted and working properly, if one side is rebooted, ack_to
> > stays at "89 A" or "2xx A" -- at least 6 tests of this. The same
> > result occurs if distance is set static then back to auto on a live
> > node.
>
> Hi,
>
> first of all thx a lot for testing :)
> Could you please provide me the dynack log output when the system is not
> working? (when the ack timeout does not converge, 89 A or 2xx A)
>
> Regards,
> Lorenzo
>
Lorenzo, I deployed an ath9k auto distance solution in April that is
working for the AREDN community http://www.arednmesh.org .
https://github.com/aredn/aredn_ar71xx/blob/develop/patches/712-auto-distance-settings.patch
Summary of solution:
* no dependency on wpa_supplicant
* initial ack_to is set to max, to not enter late ack conditions
* User level trigger to flip distance setting to static and back to
auto when new 802.11 adhoc neighbor joins. (we archive and chart SNR
values for neighbors and natural to hook in this trigger).
Findings:
1) Throughput of P2P links greatly improved, by upwards of 50% iperf
results. ack_to value increases by ~20% under load and floats back
down closer to physical distance value under lite load. From prior
tests, the throughput on a ~60km link compares directly with AirOS
TDMA P2P, although needs confirmation. Best Value use case.
2) P2MP thoughput has mixed results. Negative influencing factor
appears to be if there are low SNR neighbors. The symptom is a wide
range of ack_to values, sometimes double the ack_to value, between
successive values from the same neighbor. Auto Distance may or may
not improve over static.
3) short distance (inside the home) ack_to values are 5km+.
Throughput is lower than setting to a static value. Auto distance
does not add value.
4) Low SNR neighbors may not change from initial ack_to setting.
Added code change to ignore neighbors at max ack_to when determining
farthest distance to set ack_to.
5) mobile environment not yet tested, but will in time.
Joe AE6XE
> >
> > > > question:
> > > > ack_ts = timestamp of the received 'ack'
> > >
> > > yes
> > >
> > > > st_ts = timestamp sending data to the remote station?
> > >
> > > yes
> > >
> > > > st_dur = length of time processing beyond air time?
> > >
> > > frame tx time
> > >
> > > >
> > > > How could ack_ts be before st_ts on many log entries?. Not the same
> > > > round trip pair?
> > >
> > > ack timeout was too low for that frame
> > >
> > > Regards,
> > > Lorenzo
> > >
> > > >
> > > > > > [ 644.262302] ath: phy0: rx sample 603744259 [h 0-t 1]
> > > > > > [ 644.264031] ath: phy0: rx sample 603746028 [h 0-t 2]
> > > > > > [ 644.267114] ath: phy0: rx sample 603749107 [h 0-t 3]
> > > > > > [ 644.278900] ath: phy0: rx sample 603760863 [h 0-t 4]
> > > > > > [ 644.299039] ath: phy0: rx sample 603780986 [h 0-t 5]
> > > > > > [ 644.342403] ath: phy0: rx sample 603824358 [h 0-t 6]
> > > > > > [ 644.375579] ath: phy0: rx sample 603857539 [h 0-t 7]
> > > > > > [ 644.401691] ath: phy0: rx sample 603883636 [h 0-t 8]
> > > > > > [ 644.409212] ath: phy0: rx sample 603891183 [h 0-t 9]
> > > > > > [ 645.264002] ath: phy0: rx sample 604745956 [h 0-t 10]
> > > > > > [ 645.266158] ath: phy0: rx sample 604748155 [h 0-t 11]
> > > > > > [ 645.269178] ath: phy0: rx sample 604751171 [h 0-t 12]
> > > > > > [ 645.272616] ath: phy0: rx sample 604754574 [h 0-t 13]
> > > > > > [ 645.274497] ath: phy0: rx sample 604756481 [h 0-t 14]
> > > > > > [ 645.289603] ath: phy0: rx sample 604771574 [h 0-t 15]
> > > > > > [ 645.317443] ath: phy0: rx sample 604799361 [h 0-t 16]
> > > > > > [ 645.342753] ath: phy0: rx sample 604824675 [h 0-t 17]
> > > > > > [ 645.380092] ath: phy0: rx sample 604862005 [h 0-t 18]
> > > > > > [ 645.382277] ath: phy0: rx sample 604864222 [h 0-t 19]
> > > > > > [ 646.361902] ath: phy0: rx sample 605843815 [h 0-t 20]
> > > > > > [ 646.379173] ath: phy0: rx sample 605861106 [h 0-t 21]
> > > > > > [ 647.267357] ath: phy0: rx sample 606749284 [h 0-t 22]
> > > > > > [ 647.270280] ath: phy0: rx sample 606752217 [h 0-t 23]
> > > > > > [ 647.271846] ath: phy0: rx sample 606753815 [h 0-t 24]
> > > > > > [ 647.281800] ath: phy0: rx sample 606763721 [h 0-t 25]
> > > > > > [ 647.295926] ath: phy0: rx sample 606777865 [h 0-t 26]
> > > > > > [ 647.306798] ath: phy0: rx sample 606788726 [h 0-t 27]
> > > > > > [ 647.328574] ath: phy0: rx sample 606810510 [h 0-t 28]
> > > > > > [ 647.341512] ath: phy0: rx sample 606823450 [h 0-t 29]
> > > > > > [ 647.359945] ath: phy0: rx sample 606841877 [h 0-t 30]
> > > > > > [ 648.268526] ath: phy0: rx sample 607750431 [h 0-t 31]
> > > > > > [ 648.270315] ath: phy0: rx sample 607752248 [h 0-t 32]
> > > > > > [ 648.273354] ath: phy0: rx sample 607755322 [h 0-t 33]
> > > > > > [ 648.276563] ath: phy0: rx sample 607758531 [h 0-t 34]
> > > > > > [ 648.298305] ath: phy0: rx sample 607780232 [h 0-t 35]
> > > > > > [ 648.333118] ath: phy0: rx sample 607815048 [h 0-t 36]
> > > > > > [ 648.360147] ath: phy0: rx sample 607842085 [h 0-t 37]
> > > > > > [ 648.368375] ath: phy0: rx sample 607850318 [h 0-t 38]
> > > > > > [ 648.383082] ath: phy0: rx sample 607865002 [h 0-t 39]
> > > > > > [ 658.403020] ath: phy0: rx sample 617884931 [h 0-t 40]
> > > > > > [ 658.403811] ath: phy0: rx sample 617885784 [h 0-t 41]
> > > > > > [ 658.404643] ath: phy0: rx sample 617886788 [h 0-t 42]
> > > > > > [ 658.407379] ath: phy0: rx sample 617889332 [h 0-t 43]
> > > > > > [ 658.419606] ath: phy0: rx sample 617901545 [h 0-t 44]
> > > > > > [ 658.421322] ath: phy0: rx sample 617903258 [h 0-t 45]
> > > > > > [ 658.466056] ath: phy0: rx sample 617947993 [h 0-t 46]
> > > > > > [ 658.494433] ath: phy0: rx sample 617976380 [h 0-t 47]
> > > > > > [ 658.497675] ath: phy0: rx sample 617979642 [h 0-t 48]
> > > > > > [ 658.520552] ath: phy0: late ack
> > > > > > [ 658.521240] ath: phy0: rx sample 618003158 [h 0-t 49]
> > > > > > [ 658.524545] ath: phy0: rx sample 618006759 [h 0-t 50]
> > > > > > [ 658.524589] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 618005837 [dur
> > > > > > 232][h 0-t 1]
> > > > > > [ 658.524607] ath: phy0: ack_ts 603744259 st_ts 618005837 st_dur 232
> > > > > > [0-0] max_to 744
> > > > > > [ 658.524624] ath: phy0: ack_ts 603746028 st_ts 618005837 st_dur 232
> > > > > > [1-0] max_to 744
> > > > > > [ 658.524640] ath: phy0: ack_ts 603749107 st_ts 618005837 st_dur 232
> > > > > > [2-0] max_to 744
> > > > > > [ 658.524657] ath: phy0: ack_ts 603760863 st_ts 618005837 st_dur 232
> > > > > > [3-0] max_to 744
> > > > > > [ 658.524674] ath: phy0: ack_ts 603780986 st_ts 618005837 st_dur 232
> > > > > > [4-0] max_to 744
> > > > > > [ 658.524690] ath: phy0: ack_ts 603824358 st_ts 618005837 st_dur 232
> > > > > > [5-0] max_to 744
> > > > > > [ 658.524707] ath: phy0: ack_ts 603857539 st_ts 618005837 st_dur 232
> > > > > > [6-0] max_to 744
> > > > > > [ 658.524724] ath: phy0: ack_ts 603883636 st_ts 618005837 st_dur 232
> > > > > > [7-0] max_to 744
> > > > > > [ 658.524741] ath: phy0: ack_ts 603891183 st_ts 618005837 st_dur 232
> > > > > > [8-0] max_to 744
> > > > > > [ 658.524757] ath: phy0: ack_ts 604745956 st_ts 618005837 st_dur 232
> > > > > > [9-0] max_to 744
> > > > > > [ 658.524774] ath: phy0: ack_ts 604748155 st_ts 618005837 st_dur 232
> > > > > > [10-0] max_to 744
> > > > > > [ 658.524791] ath: phy0: ack_ts 604751171 st_ts 618005837 st_dur 232
> > > > > > [11-0] max_to 744
> > > > > > [ 658.524808] ath: phy0: ack_ts 604754574 st_ts 618005837 st_dur 232
> > > > > > [12-0] max_to 744
> > > > > > [ 658.524825] ath: phy0: ack_ts 604756481 st_ts 618005837 st_dur 232
> > > > > > [13-0] max_to 744
> > > > > > [ 658.524841] ath: phy0: ack_ts 604771574 st_ts 618005837 st_dur 232
> > > > > > [14-0] max_to 744
> > > > > > [ 658.524858] ath: phy0: ack_ts 604799361 st_ts 618005837 st_dur 232
> > > > > > [15-0] max_to 744
> > > > > > [ 658.524875] ath: phy0: ack_ts 604824675 st_ts 618005837 st_dur 232
> > > > > > [16-0] max_to 744
> > > > > > [ 658.524892] ath: phy0: ack_ts 604862005 st_ts 618005837 st_dur 232
> > > > > > [17-0] max_to 744
> > > > > > [ 658.524908] ath: phy0: ack_ts 604864222 st_ts 618005837 st_dur 232
> > > > > > [18-0] max_to 744
> > > > > > [ 658.524925] ath: phy0: ack_ts 605843815 st_ts 618005837 st_dur 232
> > > > > > [19-0] max_to 744
> > > > > > [ 658.524942] ath: phy0: ack_ts 605861106 st_ts 618005837 st_dur 232
> > > > > > [20-0] max_to 744
> > > > > > [ 658.524959] ath: phy0: ack_ts 606749284 st_ts 618005837 st_dur 232
> > > > > > [21-0] max_to 744
> > > > > > [ 658.524975] ath: phy0: ack_ts 606752217 st_ts 618005837 st_dur 232
> > > > > > [22-0] max_to 744
> > > > > > [ 658.524992] ath: phy0: ack_ts 606753815 st_ts 618005837 st_dur 232
> > > > > > [23-0] max_to 744
> > > > > > [ 658.525009] ath: phy0: ack_ts 606763721 st_ts 618005837 st_dur 232
> > > > > > [24-0] max_to 744
> > > > > > [ 658.525026] ath: phy0: ack_ts 606777865 st_ts 618005837 st_dur 232
> > > > > > [25-0] max_to 744
> > > > > > [ 658.525042] ath: phy0: ack_ts 606788726 st_ts 618005837 st_dur 232
> > > > > > [26-0] max_to 744
> > > > > > [ 658.525059] ath: phy0: ack_ts 606810510 st_ts 618005837 st_dur 232
> > > > > > [27-0] max_to 744
> > > > > > [ 658.525076] ath: phy0: ack_ts 606823450 st_ts 618005837 st_dur 232
> > > > > > [28-0] max_to 744
> > > > > > [ 658.525093] ath: phy0: ack_ts 606841877 st_ts 618005837 st_dur 232
> > > > > > [29-0] max_to 744
> > > > > > [ 658.525110] ath: phy0: ack_ts 607750431 st_ts 618005837 st_dur 232
> > > > > > [30-0] max_to 744
> > > > > > [ 658.525126] ath: phy0: ack_ts 607752248 st_ts 618005837 st_dur 232
> > > > > > [31-0] max_to 744
> > > > > > [ 658.525143] ath: phy0: ack_ts 607755322 st_ts 618005837 st_dur 232
> > > > > > [32-0] max_to 744
> > > > > > [ 658.525160] ath: phy0: ack_ts 607758531 st_ts 618005837 st_dur 232
> > > > > > [33-0] max_to 744
> > > > > > [ 658.525177] ath: phy0: ack_ts 607780232 st_ts 618005837 st_dur 232
> > > > > > [34-0] max_to 744
> > > > > > [ 658.525194] ath: phy0: ack_ts 607815048 st_ts 618005837 st_dur 232
> > > > > > [35-0] max_to 744
> > > > > > [ 658.525210] ath: phy0: ack_ts 607842085 st_ts 618005837 st_dur 232
> > > > > > [36-0] max_to 744
> > > > > > [ 658.525227] ath: phy0: ack_ts 607850318 st_ts 618005837 st_dur 232
> > > > > > [37-0] max_to 744
> > > > > > [ 658.525244] ath: phy0: ack_ts 607865002 st_ts 618005837 st_dur 232
> > > > > > [38-0] max_to 744
> > > > > > [ 658.525260] ath: phy0: ack_ts 617884931 st_ts 618005837 st_dur 232
> > > > > > [39-0] max_to 744
> > > > > > [ 658.525277] ath: phy0: ack_ts 617885784 st_ts 618005837 st_dur 232
> > > > > > [40-0] max_to 744
> > > > > > [ 658.525294] ath: phy0: ack_ts 617886788 st_ts 618005837 st_dur 232
> > > > > > [41-0] max_to 744
> > > > > > [ 658.525311] ath: phy0: ack_ts 617889332 st_ts 618005837 st_dur 232
> > > > > > [42-0] max_to 744
> > > > > > [ 658.525328] ath: phy0: ack_ts 617901545 st_ts 618005837 st_dur 232
> > > > > > [43-0] max_to 744
> > > > > > [ 658.525344] ath: phy0: ack_ts 617903258 st_ts 618005837 st_dur 232
> > > > > > [44-0] max_to 744
> > > > > > [ 658.525361] ath: phy0: ack_ts 617947993 st_ts 618005837 st_dur 232
> > > > > > [45-0] max_to 744
> > > > > > [ 658.525378] ath: phy0: ack_ts 617976380 st_ts 618005837 st_dur 232
> > > > > > [46-0] max_to 744
> > > > > > [ 658.525394] ath: phy0: ack_ts 617979642 st_ts 618005837 st_dur 232
> > > > > > [47-0] max_to 744
> > > > > > [ 658.525411] ath: phy0: ack_ts 618003158 st_ts 618005837 st_dur 232
> > > > > > [48-0] max_to 744
> > > > > > [ 658.525428] ath: phy0: ack_ts 618006759 st_ts 618005837 st_dur 232
> > > > > > [49-0] max_to 744
> > > > > > [ 658.525441] ath: phy0: 44:d9:e7:c0:15:4d to 690 [690]
> > > > > > [ 658.535536] ath: phy0: rx sample 618017698 [h 50-t 51]
> > > > > > [ 658.535619] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 618016720 [dur
> > > > > > 256][h 1-t 2]
> > > > > > [ 658.535636] ath: phy0: ack_ts 618017698 st_ts 618016720 st_dur 256
> > > > > > [50-1] max_to 744
> > > > > > [ 658.535649] ath: phy0: 44:d9:e7:c0:15:4d to 698 [722]
> > > > > > [ 658.542894] ath: phy0: rx sample 618025043 [h 51-t 52]
> > > > > > [ 658.542985] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 618023968 [dur
> > > > > > 304][h 2-t 3]
> > > > > > [ 658.543002] ath: phy0: ack_ts 618025043 st_ts 618023968 st_dur 304
> > > > > > [51-2] max_to 744
> > > > > > [ 658.548405] ath: phy0: rx sample 618030575 [h 51-t 53]
> > > > > > [ 658.548479] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 618029652 [dur
> > > > > > 232][h 3-t 4]
> > > > > > [ 658.548496] ath: phy0: ack_ts 618025043 st_ts 618029652 st_dur 232
> > > > > > [51-3] max_to 744
> > > > > > [ 658.548513] ath: phy0: ack_ts 618030575 st_ts 618029652 st_dur 232
> > > > > > [52-3] max_to 744
> > > > > > [ 658.548527] ath: phy0: 44:d9:e7:c0:15:4d to 696 [691]
> > > > > > [ 675.473873] ath: phy0: rx sample 634956047 [h 53-t 54]
> > > > > > [ 675.473948] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 634955445 [dur
> > > > > > 56][h 4-t 5]
> > > > > > [ 675.473966] ath: phy0: ack_ts 634956047 st_ts 634955445 st_dur 56
> > > > > > [53-4] max_to 744
> > > > > > [ 675.473979] ath: phy0: 44:d9:e7:c0:15:4d to 658 [546]
> > > > > > [ 675.473990] ath: phy0: ACK timeout 658 slottime 327
> > > > > > [ 675.479661] ath: phy0: rx sample 634961869 [h 54-t 55]
> > > > > > [ 675.479712] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 634961211 [dur
> > > > > > 96][h 5-t 6]
> > > > > > [ 675.479729] ath: phy0: ack_ts 634961869 st_ts 634961211 st_dur 96
> > > > > > [54-5] max_to 744
> > > > > > [ 675.479742] ath: phy0: 44:d9:e7:c0:15:4d to 634 [562]
> > > > > > [ 675.491078] ath: phy0: rx sample 634973253 [h 55-t 56]
> > > > > > [ 675.491155] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 634972643 [dur
> > > > > > 64][h 6-t 7]
> > > > > > [ 675.491173] ath: phy0: ack_ts 634973253 st_ts 634972643 st_dur 64
> > > > > > [55-6] max_to 744
> > > > > > [ 675.491186] ath: phy0: 44:d9:e7:c0:15:4d to 612 [546]
> > > > > > [ 675.528756] ath: phy0: rx sample 635010935 [h 56-t 57]
> > > > > > [ 675.528818] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 635009773 [dur
> > > > > > 320][h 7-t 8]
> > > > > > [ 675.528836] ath: phy0: ack_ts 635010935 st_ts 635009773 st_dur 320
> > > > > > [56-7] max_to 744
> > > > > > [ 675.937714] ath: phy0: rx sample 635419888 [h 56-t 58]
> > > > > > [ 675.937790] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 635419319 [dur
> > > > > > 48][h 8-t 9]
> > > > > > [ 675.937807] ath: phy0: ack_ts 635010935 st_ts 635419319 st_dur 48
> > > > > > [56-8] max_to 744
> > > > > > [ 675.937824] ath: phy0: ack_ts 635419888 st_ts 635419319 st_dur 48
> > > > > > [57-8] max_to 744
> > > > > > [ 675.937838] ath: phy0: 44:d9:e7:c0:15:4d to 589 [521]
> > > > > > [ 675.940082] ath: phy0: rx sample 635422211 [h 58-t 59]
> > > > > > [ 675.940152] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 635421555 [dur
> > > > > > 96][h 9-t 10]
> > > > > > [ 675.940169] ath: phy0: ack_ts 635422211 st_ts 635421555 st_dur 96
> > > > > > [58-9] max_to 744
> > > > > > [ 675.940182] ath: phy0: 44:d9:e7:c0:15:4d to 581 [560]
> > > > > > [ 676.324497] ath: phy0: rx sample 635806674 [h 59-t 60]
> > > > > > [ 676.324575] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 635806105 [dur
> > > > > > 48][h 10-t 11]
> > > > > > [ 676.324593] ath: phy0: ack_ts 635806674 st_ts 635806105 st_dur 48
> > > > > > [59-10] max_to 744
> > > > > > [ 676.324606] ath: phy0: 44:d9:e7:c0:15:4d to 566 [521]
> > > > > > [ 676.788108] ath: phy0: rx sample 636270284 [h 60-t 61]
> > > > > > [ 676.788185] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 636269715 [dur
> > > > > > 48][h 11-t 12]
> > > > > > [ 676.788203] ath: phy0: ack_ts 636270284 st_ts 636269715 st_dur 48
> > > > > > [60-11] max_to 744
> > > > > > [ 676.788217] ath: phy0: 44:d9:e7:c0:15:4d to 554 [521]
> > > > > > [ 676.845108] ath: phy0: rx sample 636327291 [h 61-t 62]
> > > > > > [ 676.845179] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 636326720 [dur
> > > > > > 48][h 12-t 13]
> > > > > > [ 676.845197] ath: phy0: ack_ts 636327291 st_ts 636326720 st_dur 48
> > > > > > [61-12] max_to 744
> > > > > > [ 676.845211] ath: phy0: 44:d9:e7:c0:15:4d to 546 [523]
> > > > > > [ 677.266082] ath: phy0: rx sample 636748260 [h 62-t 63]
> > > > > > [ 677.266181] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 636747689 [dur
> > > > > > 48][h 13-t 14]
> > > > > > [ 677.266199] ath: phy0: ack_ts 636748260 st_ts 636747689 st_dur 48
> > > > > > [62-13] max_to 744
> > > > > > [ 677.266212] ath: phy0: 44:d9:e7:c0:15:4d to 540 [523]
> > > > > > [ 678.517030] ath: phy0: rx sample 637999206 [h 63-t 0]
> > > > > > [ 678.517103] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 637998637 [dur
> > > > > > 48][h 14-t 15]
> > > > > > [ 678.517120] ath: phy0: ack_ts 637999206 st_ts 637998637 st_dur 48
> > > > > > [63-14] max_to 744
> > > > > > [ 678.517134] ath: phy0: 44:d9:e7:c0:15:4d to 535 [521]
> > > > > > [ 679.538900] ath: phy0: rx sample 639021067 [h 0-t 1]
> > > > > > [ 679.538984] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 639020497 [dur
> > > > > > 48][h 15-t 16]
> > > > > > [ 679.539001] ath: phy0: ack_ts 639021067 st_ts 639020497 st_dur 48
> > > > > > [0-15] max_to 744
> > > > > > [ 679.539014] ath: phy0: 44:d9:e7:c0:15:4d to 531 [522]
> > > > > > [ 679.864056] ath: phy0: rx sample 639346215 [h 1-t 2]
> > > > > > [ 679.864135] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 639345557 [dur
> > > > > > 96][h 16-t 17]
> > > > > > [ 679.864153] ath: phy0: ack_ts 639346215 st_ts 639345557 st_dur 96
> > > > > > [1-16] max_to 744
> > > > > > [ 679.864200] ath: phy0: 44:d9:e7:c0:15:4d to 538 [562]
> > > > > > [ 679.877200] ath: phy0: rx sample 639359366 [h 2-t 3]
> > > > > > [ 679.877277] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 639358795 [dur
> > > > > > 48][h 17-t 18]
> > > > > > [ 679.877295] ath: phy0: ack_ts 639359366 st_ts 639358795 st_dur 48
> > > > > > [2-17] max_to 744
> > > > > > [ 679.877308] ath: phy0: 44:d9:e7:c0:15:4d to 534 [523]
> > > > > > [ 679.880201] ath: phy0: rx sample 639362344 [h 3-t 4]
> > > > > > [ 679.880279] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 639361686 [dur
> > > > > > 96][h 18-t 19]
> > > > > > [ 679.880296] ath: phy0: ack_ts 639362344 st_ts 639361686 st_dur 96
> > > > > > [3-18] max_to 744
> > > > > > [ 679.880309] ath: phy0: 44:d9:e7:c0:15:4d to 541 [562]
> > > > > > [ 680.510777] ath: phy0: rx sample 639992947 [h 4-t 5]
> > > > > > [ 680.510853] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 639992377 [dur
> > > > > > 48][h 19-t 20]
> > > > > > [ 680.510870] ath: phy0: ack_ts 639992947 st_ts 639992377 st_dur 48
> > > > > > [4-19] max_to 744
> > > > > > [ 680.510883] ath: phy0: 44:d9:e7:c0:15:4d to 536 [522]
> > > > > > [ 680.510894] ath: phy0: ACK timeout 536 slottime 266
> > > > > > [ 680.510883] ath: phy0: 44:d9:e7:c0:15:4d to 536 [522]
> > > > > > [ 680.510894] ath: phy0: ACK timeout 536 slottime 266
> > > > > > [ 680.848227] ath: phy0: rx sample 640330408 [h 5-t 6]
> > > > > > [ 680.848308] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 640329837 [dur
> > > > > > 48][h 20-t 21]
> > > > > > [ 680.848326] ath: phy0: ack_ts 640330408 st_ts 640329837 st_dur 48
> > > > > > [5-20] max_to 744
> > > > > > [ 680.848339] ath: phy0: 44:d9:e7:c0:15:4d to 532 [523]
> > > > > > [ 681.455324] ath: phy0: rx sample 640937504 [h 6-t 7]
> > > > > > [ 681.455401] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 640936934 [dur
> > > > > > 48][h 21-t 22]
> > > > > > [ 681.455418] ath: phy0: ack_ts 640937504 st_ts 640936934 st_dur 48
> > > > > > [6-21] max_to 744
> > > > > > [ 681.455432] ath: phy0: 44:d9:e7:c0:15:4d to 529 [522]
> > > > > > [ 681.654238] ath: phy0: rx sample 641136419 [h 7-t 8]
> > > > > > [ 681.654313] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 641135817 [dur
> > > > > > 64][h 22-t 23]
> > > > > > [ 681.654331] ath: phy0: ack_ts 641136419 st_ts 641135817 st_dur 64
> > > > > > [7-22] max_to 744
> > > > > > [ 681.654344] ath: phy0: 44:d9:e7:c0:15:4d to 531 [538]
> > > > > > [ 682.170862] ath: phy0: rx sample 641653035 [h 8-t 9]
> > > > > > [ 682.170944] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 641652465 [dur
> > > > > > 48][h 23-t 24]
> > > > > > [ 682.170962] ath: phy0: ack_ts 641653035 st_ts 641652465 st_dur 48
> > > > > > [8-23] max_to 744
> > > > > > [ 682.170975] ath: phy0: 44:d9:e7:c0:15:4d to 528 [522]
> > > > > > [ 682.225275] ath: phy0: rx sample 641707445 [h 9-t 10]
> > > > > > [ 682.225355] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 641706876 [dur
> > > > > > 48][h 24-t 25]
> > > > > > [ 682.225373] ath: phy0: ack_ts 641707445 st_ts 641706876 st_dur 48
> > > > > > [9-24] max_to 744
> > > > > > [ 682.225386] ath: phy0: 44:d9:e7:c0:15:4d to 526 [521]
> > > > > > [ 682.609319] ath: phy0: rx sample 642091496 [h 10-t 11]
> > > > > > [ 682.609397] ath: phy0: {44:d9:e7:c0:15:4d} tx sample 642090926 [dur
> > > > > > 48][h 25-t 26]
> > > > > > [ 682.609415] ath: phy0: ack_ts 642091496 st_ts 642090926 st_dur 48
> > > > > > [10-25] max_to 744
> > > > > > [ 682.609428] ath: phy0: 44:d9:e7:c0:15:4d to 525 [522]
> > > > > > ...
> > > > > >
> > > > > > Joe AE6XE
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