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https://issues.apache.org/jira/browse/MYNEWT-756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16057958#comment-16057958
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Christopher Collins commented on MYNEWT-756:
I believe it is failing because your newtmgr client is using a lower BLE MTU.
Incoming data gets distributed among mbufs according to how it was fragmented
by the sender. On my macbook, Mac OS uses an MTU of 104, while the "new"
newtmgr uses something between 256 and 517, depending on how both peers are
configured.
I was able to get mpstats working on a 16kB nRF51dk using an MTU of 104 with
the following settings:
{noformat}
MSYS_1_BLOCK_COUNT: 22
MSYS_1_BLOCK_SIZE: 110
{noformat}
Could you give that a try and let me know if it works?
> mpstats (on nrf51) hangs indefinately
> -
>
> Key: MYNEWT-756
> URL: https://issues.apache.org/jira/browse/MYNEWT-756
> Project: Mynewt
> Issue Type: Bug
> Security Level: Public(Viewable by anyone)
> Components: Newt
>Reporter: Jacob
>Assignee: Christopher Collins
> Fix For: v1_1_0_rel
>
>
> I believe core is failing before sending the last packet, as neither newtmgr
> or node-newtmgr receives that packet.
> Jacobs-MacBook-Air:newtmgr jacobrosenthal$ GODEBUG=cgocheck=0 newtmgr mpstats
> -cnimble_bleprph -t -ldebug
> 2017/05/11 22:28:46 [DEBUG] BLE Connection devaddr:[]
> 2017/05/11 22:28:46 [DEBUG] State:PoweredOn
> 2017/05/11 22:28:46 [DEBUG] scanning...
> 2017/05/11 22:28:46 [DEBUG] Peripheral Discovered: , Address:[0 0 0 0 0 0]
> Address Type:0
> 2017/05/11 22:28:47 Unhandled event: xpc.Dict{"kCBMsgId":53,
> "kCBMsgArgs":xpc.Dict{"kCBMsgArgDeviceUUID":xpc.UUID{0x2f, 0xd, 0xcb, 0x60,
> 0xf, 0x3e, 0x47, 0x52, 0xb7, 0x74, 0x13, 0x29, 0x3a, 0x3, 0xd4, 0xd0},
> "kCBMsgArgATTMTU":104}}
> 2017/05/11 22:28:47 [DEBUG] Peripheral Connected
> 2017/05/11 22:28:47 [DEBUG] Newtmgr Service Found
> 2017/05/11 22:28:47 [DEBUG] Newtmgr Characteristic Found
> 2017/05/11 22:28:47 [DEBUG] Writing newtmgr request &{Op:0 Flags:0 Len:0
> Group:0 Seq:0 Id:3 Data:[]}
> 2017/05/11 22:28:47 [DEBUG] Serializing request &{Op:0 Flags:0 Len:0 Group:0
> Seq:0 Id:3 Data:[]} into buffer [0 0 0 0 0 0 0 3]
> 2017/05/11 22:28:47 [DEBUG] Tx packet dump:
> 00 00 00 00 00 00 00 03 ||
> 2017/05/11 22:28:47 [DEBUG] Write BLE Packet:buf:: len::8
> 2017/05/11 22:28:47 [DEBUG] Read BLE
> Packet:buf::l?brcfmpools?fmsys_1?fblksiz$enblks
>
> enfreecmin?wble_hci_ram_evt_hi_pool?fblksizHenblkse len::101
> 2017/05/11 22:28:47 [DEBUG] Rx packet dump:
> 01 00 02 6c 00 00 00 03 bf 62 72 63 00 66 6d 70 |...l.brc.fmp|
> 0010 6f 6f 6c 73 bf 66 6d 73 79 73 5f 31 bf 66 62 6c |ools.fmsys_1.fbl|
> 0020 6b 73 69 7a 19 01 24 65 6e 62 6c 6b 73 0c 65 6e |ksiz..$enblks.en|
> 0030 66 72 65 65 09 63 6d 69 6e 00 ff 77 62 6c 65 5f |free.cmin..wble_|
> 0040 68 63 69 5f 72 61 6d 5f 65 76 74 5f 68 69 5f 70 |hci_ram_evt_hi_p|
> 0050 6f 6f 6c bf 66 62 6c 6b 73 69 7a 18 48 65 6e 62 |ool.fblksiz.Henb|
> 0060 6c 6b 73 02 65|lks.e|
> 2017/05/11 22:28:47 [DEBUG] Deserialized response &{Op:1 Flags:0 Len:620
> Group:0 Seq:0 Id:3 Data:[191 98 114 99 0 102 109 112 111 111 108 115 191 102
> 109 115 121 115 95 49 191 102 98 108 107 115 105 122 25 1 36 101 110 98 108
> 107 115 12 101 110 102 114 101 101 9 99 109 105 110 0 255 119 98 108 101 95
> 104 99 105 95 114 97 109 95 101 118 116 95 104 105 95 112 111 111 108 191 102
> 98 108 107 115 105 122 24 72 101 110 98 108 107 115 2 101]}
> 2017/05/11 22:28:47 [DEBUG] Read BLE
> Packet:buf::nfreecmin?wble_hci_ram_evt_lo_pool?fblksizHenblkenfrecmi?rble_hs_hci_ev_pool?fblksizenblks
> len::101
> 2017/05/11 22:28:47 [DEBUG] Rx packet dump:
> 6e 66 72 65 65 02 63 6d 69 6e 00 ff 77 62 6c 65 |nfree.cmin..wble|
> 0010 5f 68 63 69 5f 72 61 6d 5f 65 76 74 5f 6c 6f 5f |_hci_ram_evt_lo_|
> 0020 70 6f 6f 6c bf 66 62 6c 6b 73 69 7a 18 48 65 6e |pool.fblksiz.Hen|
> 0030 62 6c 6b 73 08 65 6e 66 72 65 65 08 63 6d 69 6e |blks.enfree.cmin|
> 0040 08 ff 72 62 6c 65 5f 68 73 5f 68 63 69 5f 65 76 |..rble_hs_hci_ev|
> 0050 5f 70 6f 6f 6c bf 66 62 6c 6b 73 69 7a 10 65 6e |_pool.fblksiz.en|
> 0060 62 6c 6b 73 0a|blks.|
> 2017/05/11 22:28:47 [DEBUG] Read BLE Packet:buf::enfree
> cmin
> ?pble_hs_conn_pool?fblksizTenblksenfreecmin?sble_l2cap_chan_pool?fblksizenblksenfr
> len::101
> 2017/05/11 22:28:47 [DEBUG] Rx packet dump:
> 65 6e 66 72 65 65 0a 63 6d 69 6e 09 ff 70 62 6c |enfree.cmin..pbl|
> 0010 65 5f 68 73 5f 63 6f 6e 6e 5f 70 6f 6f 6c bf 66 |e_hs_conn_pool.f|
> 0020 62 6c 6b 73 69
