On 26.1.2024. 22:47, Alexander Bluhm wrote:
> On Fri, Jan 26, 2024 at 11:41:49AM +0100, Hrvoje Popovski wrote:
>> I've manage to reproduce TSO em problem on anoter setup, unfortunatly
>> production.
> What helped debugging a similar issue with ixl(4) and TSO was to
> remove all TSO specific code from the driver. Then only this part
> remains from the original em(4) TSO diff.
>
> error = bus_dmamap_create(sc->sc_dmat, EM_TSO_SIZE,
> EM_MAX_SCATTER / (sc->pcix_82544 ? 2 : 1),
> EM_TSO_SEG_SIZE, 0, BUS_DMA_NOWAIT, &pkt->pkt_map);
>
> The parameters that changed when adding TSO are:
>
> bus_size_t size: MAX_JUMBO_FRAME_SIZE 16128 -> EM_TSO_SIZE 65535
> bus_size_t maxsegsz: MAX_JUMBO_FRAME_SIZE 16128 -> EM_TSO_SEG_SIZE 4096
>
> I suspect that this is the cause for the regression as disabling
> TSO did not help. Would it be possible to run the diff below? I
> expect that the problem will still be there. But then we know it
> must be the change of one of the bus_dmamap_create() arguments.
>
> bluhm
Hi,
with this diff em0 seems happy and em watchdog is gone.
bcbnfw1# uptime
8:06AM up 44 mins, 2 users, load averages: 0.00, 0.00, 0.00
bcbnfw1# ifconfig em0 hwfeatures
em0: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST>
mtu 1500
hwfeatures=1b7<CSUM_IPv4,CSUM_TCPv4,CSUM_UDPv4,VLAN_MTU,VLAN_HWTAGGING,CSUM_TCPv6,CSUM_UDPv6>
hardmtu 9216
lladdr 0c:c4:7a:da:cd:5a
index 3 priority 0 llprio 3
groups: egress
media: Ethernet autoselect (1000baseT full-duplex,master,rxpause)
status: active
inet 10.10.155.234 netmask 0xfffffff8 broadcast 10.10.155.239
This morning without diff
bcbnfw1# cat /var/log/messages | grep watchdog
Jan 27 07:12:03 bcbnfw1 /bsd: em0: watchdog: head 50 tail 114 TDH 114 TDT 50
Jan 27 07:15:29 bcbnfw1 /bsd: em0: watchdog: head 370 tail 434 TDH 434
TDT 370
Jan 27 07:15:43 bcbnfw1 /bsd: em0: watchdog: head 219 tail 283 TDH 283
TDT 219
Jan 27 07:15:54 bcbnfw1 /bsd: em0: watchdog: head 322 tail 386 TDH 386
TDT 322
Jan 27 07:16:08 bcbnfw1 /bsd: em0: watchdog: head 115 tail 179 TDH 179
TDT 115
Jan 27 07:16:21 bcbnfw1 /bsd: em0: watchdog: head 364 tail 428 TDH 428
TDT 364
Jan 27 07:16:35 bcbnfw1 /bsd: em0: watchdog: head 473 tail 26 TDH 26 TDT 473
