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    I'd say we should release this version now.<br>
    <br>
    No new issues so far, the #241 workaround works as designed, and
    crash ratio is low.<br>
    <br>
    Regards,<br>
    Michael<br>
    <br>
    <br>
    <div class="moz-cite-prefix">Am 09.09.19 um 17:18 schrieb Michael
      Balzer:<br>
    </div>
    <blockquote type="cite"
      cite="mid:c107cc46-32e3-30c8-bb2e-777a751e01c2@expeedo.de">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      Mark,<br>
      <br>
      I did the same checks as you and came to the same conclusion.<br>
      <br>
      For the webserver timer, that looks non-trivial but really only
      pushes requests into the job queue and takes care to never block.
      A bit of a potential issue there is it does some logging in case
      of trouble (job queue full), and that may be bad if logging to an
      SD file is enabled. We still need to rework the file logging to
      use a separate task as well (issue #107).<br>
      <br>
      From my task data today, here are some first impressions on our
      normal CPU load:<br>
      <br>
      a) Idle tasks:<br>
      <br>
      <img src="cid:part1.6F0619A2.5B8C50B2@expeedo.de" alt="" class=""><br>
      <br>
      b) Active tasks:<br>
      <br>
      <img src="cid:part2.15B6112D.B51716A0@expeedo.de" alt="" class=""><br>
      <br>
      <br>
      10:00 - 10:30 was a drive from home (wifi) to office (no wifi),
      then another drive 13:00 - 13:30 and back home 14:00 - 14:15.<br>
      <br>
      Driving load on the NetMan is caused by the web dashboard. The
      half hour peaks are from the 12V topping from the main battery the
      Twizy does when parked.<br>
      <br>
      So that's nowhere near "too much" in terms of CPU load --
      normally. I'm waiting to catch the issue situation with this
      instrumentation.<br>
      <br>
      Regards,<br>
      Michael<br>
      <br>
      <br>
      <div class="moz-cite-prefix">Am 09.09.19 um 05:43 schrieb Mark
        Webb-Johnson:<br>
      </div>
      <blockquote type="cite"
        cite="mid:B87B8287-6913-42F8-A27E-ED7E0C76C520@webb-johnson.net">
        <meta http-equiv="Content-Type" content="text/html;
          charset=UTF-8">
        <div class="">tldr; Perhaps we should be using esp_timer and
          esp_timer_get_time() to update monotonic time then dispatch
          the ticker.* events?</div>
        <div class=""><br class="">
        </div>
        <div class="">Long story: Trying to see how monotonic time could
          not be updating...</div>
        <div class=""><br class="">
        </div>
        I never really worked out how this operates in ESP32 IDF
        freertos. We have three tasks involved in timers:
        <div class=""><br class="">
        </div>
        <div class="">
          <ul class="MailOutline">
            <li class="">esp_timer</li>
            <li class="">Tmr Svc</li>
            <li class="">eventTask</li>
          </ul>
          <div><br class="">
          </div>
          <div>From my understanding, Tmr Svc provides high level timer
            support for freertos (xTimerCreate, etc). And esp_timer
            provides esp32 specific timer support (<a
href="https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/system/esp_timer.html"
              class="" moz-do-not-send="true">https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/system/esp_timer.html</a>).
            We use Tmr Svc, and note the warnings provided in the
            espressif documentation:</div>
          <div><br class="">
          </div>
          <div>
            <div class="">
              <ul class="MailOutline">
                <li class="">Maximum resolution is equal to RTOS tick
                  period</li>
                <li class="">Timer callbacks are dispatched from a
                  low-priority task</li>
              </ul>
            </div>
          </div>
          <div><br class="">
          </div>
          <div>Currently, our housekeeping uses xTimerCreate to create a
            1 second timer (calling HousekeepingTicker1). So, in which
            task is HousekeepingTicker1() called (esp_timer or Tmr Svc)
            - I always suspected the latter (but never checked).
            Then HousekeepingTicker1() raises a signal (using ovms
            events) that pushes it onto a queue (if the queue is full,
            it discards). The eventTask will then read that queue, and
            dispatch it to our ticker.1 listeners.</div>
          <div><br class="">
          </div>
          <div>HousekeepingTicker1 is responsible for
            updating monotonictime, and given it’s simple calling of
            MyEvents.SignalEvent (which just queues it and discards on
            overflow), I don’t think that can block for any substantial
            time.</div>
          <div><br class="">
          </div>
          <div>I did a search for xTimerCreate in our code base, and
            find these used:</div>
          <div><br class="">
          </div>
          <div>
            <ul class="MailOutline">
              <li class="">components/ovms_webserver/src/ovms_webserver.cpp<br
                  class="">
                m_update_ticker = xTimerCreate("Web client update
                ticker", 250 / portTICK_PERIOD_MS, pdTRUE, NULL,
                UpdateTicker);<br class="">
                <br class="">
                This seems to do quite a bit. In particular queue
                handling and semaphores. All seem to be non-blocking,
                but the flow is non-trivial.<br class="">
                <br class="">
              </li>
              <li class="">components/vehicle_nissanleaf/src/vehicle_nissanleaf.cpp<br
                  class="">
                m_remoteCommandTimer = xTimerCreate("Nissan Leaf Remote
                Command", 100 / portTICK_PERIOD_MS, pdTRUE, this,
                remoteCommandTimer);<br class="">
                m_ccDisableTimer = xTimerCreate("Nissan Leaf CC
                Disable", 1000 / portTICK_PERIOD_MS, pdFALSE, this,
                ccDisableTimer);<br class="">
                <br class="">
                Seem ok, and non-blocking.<br class="">
                <br class="">
              </li>
              <li class="">components/vehicle_renaulttwizy/src/rt_sevcon.cpp<br
                  class="">
                m_kickdown_timer = xTimerCreate("RT kickdown",
                pdMS_TO_TICKS(100), pdTRUE, NULL, KickdownTimer);<br
                  class="">
                <br class="">
                Seems ok.<br class="">
                <br class="">
              </li>
              <li class="">components/vehicle_smarted/src/vehicle_smarted.cpp<br
                  class="">
                m_locking_timer = xTimerCreate("Smart ED Locking Timer",
                500 / portTICK_PERIOD_MS, pdTRUE, this,
                SmartEDLockingTimer);<br class="">
                <br class="">
                This code looks a bit dodgy because CommandLock and
                CommandUnlock both create this timer, and start it - but
                neither check if it is already created. That said, after
                it fires the timer is deleted by the handler.<br
                  class="">
                <br class="">
              </li>
              <li class="">components/vehicle_teslaroadster/src/vehicle_teslaroadster.cpp<br
                  class="">
                m_speedo_timer = xTimerCreate("TR ticker",<br class="">
                m_homelink_timer = xTimerCreate("Tesla Roadster Homelink
                Timer", durationms / portTICK_PERIOD_MS, pdTRUE, this,
                TeslaRoadsterHomelinkTimer);<br class="">
                <br class="">
                Similar lack of checking for duplicate timers. But I
                don’t see any blocking.</li>
            </ul>
          </div>
          <div><br class="">
          </div>
          <div>So, I don’t really think _we_ are starving the TmrSvc.
            Most likely something in the core framework.</div>
          <div><br class="">
          </div>
          <div>Regards, Mark.</div>
          <div><br class="">
            <blockquote type="cite" class="">
              <div class="">On 7 Sep 2019, at 4:55 PM, Michael Balzer
                <<a href="mailto:dexter@expeedo.de" class=""
                  moz-do-not-send="true">dexter@expeedo.de</a>>
                wrote:</div>
              <br class="Apple-interchange-newline">
              <div class="">
                <meta http-equiv="Content-Type" content="text/html;
                  charset=UTF-8" class="">
                <div text="#000000" bgcolor="#FFFFFF" class=""> I think
                  the RTOS timer service task starves. It's running on
                  core 0 with priority 1.<br class="">
                  <br class="">
                  Taks on core 0 sorted by priority:<br class="">
                  <br class="">
                  <tt class="">Number of Tasks = 20      Stack:  Now  
                    Max Total    Heap 32-bit SPIRAM C# PRI</tt><tt
                    class=""><br class="">
                  </tt><tt class=""><tt class="">3FFC84A8  6 Blk
                      ipc0              388   500  1024    7788     
                      0      0  0  24</tt><tt class=""><br class="">
                    </tt></tt><tt class=""><tt class="">3FFC77F0  5 Blk
                      OVMS CanRx        428   428  2048    3052      0 
                      31844  0  23</tt><tt class=""><br class="">
                    </tt>3FFAFBF4  1 Blk esp_timer         400   656 
                    4096   35928    644  25804  0  22</tt><tt class=""><br
                      class="">
                  </tt><tt class=""><tt class="">3FFD3240 19 Blk
                      wifi              460  2716  3584   43720     
                      0     20  0  22</tt><tt class=""><br class="">
                    </tt>3FFC03C4  2 Blk eventTask         448  1984 
                    4608     104      0      0  0  20</tt><tt class=""><br
                      class="">
                  </tt><tt class=""><tt class="">3FFC8F14 17 Blk
                      tiT               500  2308  3072    6552     
                      0      0  *  18</tt><tt class=""><br class="">
                    </tt></tt><tt class=""><tt class="">3FFE14F0 26 Blk
                      OVMS COrx         456   456  4096       0     
                      0      0  0   7</tt><tt class=""><br class="">
                    </tt><tt class="">3FFE19D4 27 Blk OVMS COwrk       
                      476   476  3072       0      0      0  0   7</tt><tt
                      class=""><br class="">
                    </tt>3FFCBC34 12 Blk Tmr Svc           352   928 
                    3072      88      0      0  0   1</tt><tt class=""><br
                      class="">
                  </tt><tt class="">3FFE7708 23 Blk mdns             
                    468  1396  4096     108      0      0  0   1</tt><tt
                    class=""><br class="">
                  </tt><br class="">
                  I don't think it's our CanRx, as that only fetches and
                  queues CAN frames, the actual work is done by the
                  listeners. The CO tasks only run for CANopen jobs,
                  which are few for normal operation.<br class="">
                  <br class="">
                  That leaves the system tasks, with main suspect -once
                  again- the wifi blob.<br class="">
                  <br class="">
                  We need to know how much CPU time the tasks actually
                  use now. I think I saw some option for this in the
                  FreeRTOS config.<br class="">
                  <br class="">
                  Regards,<br class="">
                  Michael<br class="">
                  <br class="">
                  <br class="">
                  <div class="moz-cite-prefix">Am 06.09.19 um 23:15
                    schrieb Michael Balzer:<br class="">
                  </div>
                  <blockquote type="cite"
                    cite="mid:01014878-5a73-b611-4334-989b8aea76c5@expeedo.de"
                    class="">
                    <meta http-equiv="Content-Type" content="text/html;
                      charset=UTF-8" class="">
                    The workaround is based on the monotonictime being
                    updated per second, as do the history record
                    offsets.<br class="">
                    <br class="">
                    Apparently, that mechanism doesn't work reliably.
                    That may be an indicator for some bigger underlying
                    issue.<br class="">
                    <br class="">
                    Example log excerpt:<br class="">
                    <br class="">
                    <tt class="">2019-09-06 22:07:48.126919 +0200 info 
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                      info  main: #173 C MITPROHB rx msg h
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                    </tt><tt class="">2019-09-06 22:17:31.919754 +0200
                      info  main: #173 C MITPROHB rx msg h
                      964,-270,RT-BAT-C,5,86400,2,1,3830,3795,3830,-10,25,25,25,0</tt><tt
                      class=""><br class="">
                    </tt><tt class="">2019-09-06 22:19:23.366267 +0200
                      info  main: #173 C MITPROHB rx msg h
                      964,-289,RT-BAT-C,5,86400,2,1,3830,3795,3830,-10,25,25,25,0</tt><tt
                      class=""><br class="">
                    </tt><tt class="">2019-09-06 22:21:57.344609 +0200
                      info  main: #173 C MITPROHB rx msg h
                      964,-299,RT-BAT-C,5,86400,2,1,3830,3795,3830,-10,25,25,25,0</tt><tt
                      class=""><br class="">
                    </tt><tt class="">2019-09-06 22:23:40.082406 +0200
                      info  main: #31 C MITPROHB rx msg h
                      964,-1027,RT-BAT-C,5,86400,2,1,3830,3795,3830,-10,25,25,25,0</tt><tt
                      class=""><br class="">
                    </tt><tt class="">2019-09-06 22:25:58.061883 +0200
                      info  main: #31 C MITPROHB rx msg h
                      964,-1040,RT-BAT-C,5,86400,2,1,3830,3795,3830,-10,25,25,25,0</tt><tt
                      class=""><br class="">
                    </tt><br class="">
                    <br class="">
                    This shows the ticker was only run 299 times from
                    22:07:48 to 22:21:57.<br class="">
                    <br class="">
                    After 22:21:57 the workaround was triggered and did
                    a reconnect. Apparently during that network
                    reinitialization of 103 seconds, the per second
                    ticker was run 628 times.<br class="">
                    <br class="">
                    That can't be catching up on the event queue, as
                    that queue has only 20 slots. So something strange
                    is going on here.<br class="">
                    <br class="">
                    Any ideas?<br class="">
                    <br class="">
                    Regards,<br class="">
                    Michael<br class="">
                    <br class="">
                    <br class="">
                    <div class="moz-cite-prefix">Am 06.09.19 um 08:04
                      schrieb Michael Balzer:<br class="">
                    </div>
                    <blockquote type="cite"
                      cite="mid:9ee4a7b5-59a2-a05d-046d-e932b65e3e34@expeedo.de"
                      class="">
                      <meta http-equiv="Content-Type"
                        content="text/html; charset=UTF-8" class="">
                      Mark & anyone else running a V2 server,<br
                        class="">
                      <br class="">
                      as most cars don't send history records, this also
                      needs the change to the server I just pushed, i.e.
                      server version 2.4.2.<br class="">
                      <br class="">
                      <a
href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System/commits/master"
                        moz-do-not-send="true" class="">https://github.com/openvehicles/Open-Vehicle-Monitoring-System/commits/master</a><br
                        class="">
                      <br class="">
                      Regards,<br class="">
                      Michael<br class="">
                      <br class="">
                      <br class="">
                      <div class="moz-cite-prefix">Am 05.09.19 um 19:55
                        schrieb Michael Balzer:<br class="">
                      </div>
                      <blockquote type="cite"
                        cite="mid:91892018-3ecb-2dc9-b430-e79fe598cc4c@expeedo.de"
                        class="">
                        <meta http-equiv="Content-Type"
                          content="text/html; charset=UTF-8" class="">
                        I've pushed the nasty workaround: the v2 server
                        checks for no RX over 15 minutes, then restarts
                        the network (wifi & modem) as configured for
                        autostart.<br class="">
                        <br class="">
                        Rolled out on my server in edge as
                        3.2.002-237-ge075f655.<br class="">
                        <br class="">
                        Please test.<br class="">
                        <br class="">
                        Regards,<br class="">
                        Michael<br class="">
                        <br class="">
                        <br class="">
                        <div class="moz-cite-prefix">Am 05.09.19 um
                          01:58 schrieb Mark Webb-Johnson:<br class="">
                        </div>
                        <blockquote type="cite"
                          cite="mid:D4C2658B-49FB-48CB-A687-9A7325117BC4@webb-johnson.net"
                          class="">
                          <meta http-equiv="Content-Type"
                            content="text/html; charset=UTF-8" class="">
                          <div class="">
                            <blockquote type="cite" class="">
                              <div text="#000000" bgcolor="#FFFFFF"
                                class="">Mark, you can check your server
                                logs for history messages with
                                ridiculous time offsets:<br class="">
                                <blockquote class=""><tt class="">[sddexter@ns27
                                    server]$ cat log-20190903 | egrep
                                    "rx msg h [0-9]+,-[0-9]{4}" | wc -l<br
                                      class="">
                                    455283</tt></blockquote>
                              </div>
                            </blockquote>
                            <br class="">
                          </div>
                          I checked my logs and see 12 vehicles showing
                          this. But, 2 only show this for a debugcrash
                          log (which is expected, I guess, if the time
                          is not synced at report time). I’ve got 4 cars
                          with the offset > 10,000.
                          <div class=""><br class="">
                          </div>
                          <div class="">Regards, Mark.<br class="">
                            <div class=""><br class="">
                              <blockquote type="cite" class="">
                                <div class="">On 4 Sep 2019, at 4:45 AM,
                                  Michael Balzer <<a
                                    href="mailto:dexter@expeedo.de"
                                    class="" moz-do-not-send="true">dexter@expeedo.de</a>>
                                  wrote:</div>
                                <br class="Apple-interchange-newline">
                                <div class="">
                                  <meta http-equiv="Content-Type"
                                    content="text/html; charset=UTF-8"
                                    class="">
                                  <div text="#000000" bgcolor="#FFFFFF"
                                    class=""> Everyone,<br class="">
                                    <br class="">
                                    I've pushed a change that needs some
                                    testing.<br class="">
                                    <br class="">
                                    I had the issue myself now parking
                                    at a certain distance from my garage
                                    wifi AP, i.e. on the edge of "in",
                                    after wifi had been disconnected for
                                    some hours, and with the module
                                    still connected via modem. The wifi
                                    blob had been trying to connect to
                                    the AP for about two hours.<br
                                      class="">
                                    <br class="">
                                    As seen before, the module saw no
                                    error, just the server responses and
                                    commands stopped coming in. I
                                    noticed the default interface was
                                    still "st1" despite wifi having been
                                    disconnected and modem connected.
                                    The DNS was also still configured
                                    for my wifi network, and the
                                    interface seemed to have an IP
                                    address -- but wasn't pingable from
                                    the wifi network.<br class="">
                                    <br class="">
                                    A power cycle of the modem solved
                                    the issue without reboot. So the
                                    cause may be in the modem/ppp
                                    subsystem, or it may be related (in
                                    some weird way) to the default
                                    interface / DNS setup.<br class="">
                                    <br class="">
                                    More tests showed the default
                                    interface again/still got set by the
                                    wifi blob itself at some point,
                                    overriding our modem prioritization.
                                    The events we didn't handle up to
                                    now were "sta.connected" and
                                    "sta.lostip", so I added these, and
                                    the bug didn't show up again since
                                    then. That doesn't mean anything, so
                                    we need to test this.<br class="">
                                    <br class="">
                                    The default interface really
                                    shouldn't affect inbound packet
                                    routing of an established
                                    connection, but there always may be
                                    strange bugs lurking in those libs.<br
                                      class="">
                                    <br class="">
                                    The change also reimplements the
                                    wifi signal strength reading, as the
                                    tests also showed that still wasn't
                                    working well using the CSI callback.
                                    It now seems to be much more
                                    reliable.<br class="">
                                    <br class="">
                                    Please test & report. The single
                                    module will be hard to test, as the
                                    bug isn't reproducable easily, but
                                    you can still try if wifi / modem
                                    transitions work well.<br class="">
                                    <br class="">
                                    Mark, you can check your server logs
                                    for history messages with ridiculous
                                    time offsets:<br class="">
                                    <blockquote class=""><tt class="">[sddexter@ns27
                                        server]$ cat log-20190903 |
                                        egrep "rx msg h
                                        [0-9]+,-[0-9]{4}" | wc -l<br
                                          class="">
                                        455283</tt><br class="">
                                    </blockquote>
                                    The bug now severely affects the V2
                                    server performance, as the server is
                                    single threaded and doesn't scale
                                    very well to this kind of bulk data
                                    bursts, especially when coming from
                                    multiple modules in parallel. So we
                                    really need to solve this now. Slow
                                    reactions or connection drops from
                                    my server lately have been due to
                                    this bug. If this change doesn't
                                    solve it, we'll need to add some
                                    reboot trigger on "too many server
                                    v2 notification retransmissions" --
                                    or maybe a modem power cycle will
                                    do, that wouldn't discard the data.<br
                                      class="">
                                    <br class="">
                                    Thanks,<br class="">
                                    Michael<br class="">
                                    <br class="">
                                    <br class="">
                                    <div class="moz-cite-prefix">Am
                                      03.09.19 um 07:46 schrieb Mark
                                      Webb-Johnson:<br class="">
                                    </div>
                                    <blockquote type="cite"
                                      cite="mid:7A81965B-AD97-4DFC-9768-9A03A74107BA@webb-johnson.net"
                                      class="">
                                      <pre class="moz-quote-pre" wrap="">No problem. We can hold. I won’t commit anything for the next few days (and agree to hold-off on Markos’s pull). Let me know when you are ready.

Regards, Mark.

</pre>
                                      <blockquote type="cite" class="">
                                        <pre class="moz-quote-pre" wrap="">On 3 Sep 2019, at 1:58 AM, Michael Balzer <a class="moz-txt-link-rfc2396E" href="mailto:dexter@expeedo.de" moz-do-not-send="true"><dexter@expeedo.de></a> wrote:

Mark, please wait.

I may just have found the cause for issue #241, or at least something I need to investigate before releasing.

I need to dig into my logs first, and try something.

Regards,
Michael


Am 02.09.19 um 12:23 schrieb Michael Balzer:
</pre>
                                        <blockquote type="cite" class="">
                                          <pre class="moz-quote-pre" wrap="">Nothing open from my side at the moment.

I haven't had the time to look in to Markos pull request, but from a first check also think that's going too deep to be included in this release.

Regards,
Michael


Am 02.09.19 um 04:15 schrieb Mark Webb-Johnson:
</pre>
                                          <blockquote type="cite"
                                            class="">
                                            <pre class="moz-quote-pre" wrap="">I think it is well past time for a 3.2.003 release. Things seems table in edge (although some things only partially implemented).

Anything people want to include at the last minute, or can we go ahead and build?

Regards, Mark.

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                                        <pre class="moz-quote-pre" wrap="">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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