* [B.A.T.M.A.N.] Alfred problem reading other nodes
@ 2019-02-06 16:56 beth.flippo
2019-02-06 18:14 ` Sven Eckelmann
0 siblings, 1 reply; 6+ messages in thread
From: beth.flippo @ 2019-02-06 16:56 UTC (permalink / raw)
To: b.a.t.m.a.n; +Cc: s.pinsky
Hi –
I am having a problem getting alfred retrieve info from other nodes. I am
running openwrt and alfred 2018.0.
I am able to start the alfred server with no errors both from boot and the
command line.
root@OpenWrt:~# /etc/init.d/alfred restart
/etc/init.d/alfred: waiting 30 secs for br-lan address...
/etc/init.d/alfred: starting alfred
/etc/init.d/alfred: starting batadv-vis
I can see it with ps
4290 root 816 S /usr/sbin/alfred -i br-lan -m -b bat0
I can issue a set and then a receive and I see the value I set but only
locally. It does not get any info from the other nodes in my network. They
are all running alfred servers as master.
I have added a firewall rule to open the port.
If I have 2 nodes running alfred and I run ‘tcpdump -i br-lan udp port
16962’ - I see packets from the other node:
16:21:49.279086 IP6 fe80::2d0:12ff:fe00:f0c7.16962 > ip6-allnodes.16962:
UDP, length 4
16:21:51.907852 IP6 fe80::2d0:12ff:fe2e:f1bd.16962 > ip6-allnodes.16962:
UDP, length 4
16:21:59.282603 IP6 fe80::2d0:12ff:fe00:f0c7.16962 > ip6-allnodes.16962:
UDP, length 4
16:22:01.907227 IP6 fe80::2d0:12ff:fe2e:f1bd.16962 > ip6-allnodes.16962:
UDP, length 4
16:22:09.285498 IP6 fe80::2d0:12ff:fe00:f0c7.16962 > ip6-allnodes.16962:
UDP, length 4
16:22:11.919876 IP6 fe80::2d0:12ff:fe2e:f1bd.16962 > ip6-allnodes.16962:
UDP, length 4
16:22:19.288912 IP6 fe80::2d0:12ff:fe00:f0c7.16962 > ip6-allnodes.16962:
UDP, length 4
16:22:21.916609 IP6 fe80::2d0:12ff:fe2e:f1bd.16962 > ip6-allnodes.16962:
UDP, length 4
I think these might be the master announcements but when I issue an alfred
-r # - I do not see any new messages in the tcpdump.
Output of ‘netstat -tunpl’ shows alfred
4290/alfred
udp 0 0 fe80::2d0:12ff:fe00:f0c7:16962
:::* 4290/alfred
This is the output of ‘ip a s br-lan’
12: br-lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UP group default qlen 1000
link/ether 00:d0:12:00:f0:c7 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.91/24 brd 192.168.2.255 scope global br-lan
valid_lft forever preferred_lft forever
inet6 fd5b:763:2819::1/64 scope global noprefixroute
valid_lft forever preferred_lft forever
inet6 fe80::2d0:12ff:fe00:f0c7/64 scope link
valid_lft forever preferred_lft forever
I’ve rebuilt alfred, tried different versions from the repo, nothing works.
I really would appreciate any help.
Beth
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
2019-02-06 16:56 [B.A.T.M.A.N.] Alfred problem reading other nodes beth.flippo
@ 2019-02-06 18:14 ` Sven Eckelmann
2019-02-06 18:47 ` beth.flippo
0 siblings, 1 reply; 6+ messages in thread
From: Sven Eckelmann @ 2019-02-06 18:14 UTC (permalink / raw)
To: b.a.t.m.a.n; +Cc: beth.flippo, s.pinsky
[-- Attachment #1: Type: text/plain, Size: 1917 bytes --]
On Wednesday, 6 February 2019 17.56.00 CET beth.flippo@telegrid.com wrote:
[...]
> I am having a problem getting alfred retrieve info from other nodes. I am
> running openwrt and alfred 2018.0.
Which OpenWrt version should that be? There is no release with 2018.0 and the
current version in master is also newer.
> I am able to start the alfred server with no errors both from boot and the
> command line.
>
> root@OpenWrt:~# /etc/init.d/alfred restart
> /etc/init.d/alfred: waiting 30 secs for br-lan address...
> /etc/init.d/alfred: starting alfred
> /etc/init.d/alfred: starting batadv-vis
>
> I can see it with ps
>
> 4290 root 816 S /usr/sbin/alfred -i br-lan -m -b bat0
>
> I can issue a set and then a receive and I see the value I set but only
> locally. It does not get any info from the other nodes in my network. They
> are all running alfred servers as master.
Have you checked whether process_alfred_announce_master (recv.c) rejects the
incoming packet for some reason and thus doesn't add it to the server list?
If not, have you checked whether sync_data (send.c) really sends out the data
via push_data to the remote server?
> I have added a firewall rule to open the port.
>
> If I have 2 nodes running alfred and I run ‘tcpdump -i br-lan udp port
> 16962’ - I see packets from the other node:
>
> 16:21:49.279086 IP6 fe80::2d0:12ff:fe00:f0c7.16962 > ip6-allnodes.16962:
> UDP, length 4
[...]
> I think these might be the master announcements but when I issue an alfred
> -r # - I do not see any new messages in the tcpdump.
If all daemons are in server mode then they will not create a request via
`alfred -r`. Instead, they regularly sync [1] their facts between each other
(same port but different packet type).
Kind regards,
Sven
[1] https://www.open-mesh.org/projects/alfred/wiki/Alfred_architecture#Synchronization
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
2019-02-06 18:14 ` Sven Eckelmann
@ 2019-02-06 18:47 ` beth.flippo
2019-02-06 19:03 ` Simon Wunderlich
0 siblings, 1 reply; 6+ messages in thread
From: beth.flippo @ 2019-02-06 18:47 UTC (permalink / raw)
To: 'Sven Eckelmann', b.a.t.m.a.n; +Cc: s.pinsky
We are using a gateworks board and built the latest version from their bsp
but we had batman-adv, batctl and Alfred ipk built at version 2018.0.
Batman and batctl are both working.
root@OpenWrt:~# uname -a
Linux OpenWrt 4.4.0 #16 SMP Tue Jan 29 19:41:46 UTC 2019 armv7l GNU/Linux
root@OpenWrt:~# cat /etc/openwrt_release DISTRIB_ID='Gateworks'
DISTRIB_RELEASE='Gateworks Ventana 16.02@dd98aee-dirty'
DISTRIB_REVISION='r48868'
DISTRIB_CODENAME='designated_driver'
DISTRIB_TARGET='imx6/generic'
DISTRIB_DESCRIPTION='Gateworks Designated Driver Gateworks Ventana
16.02@dd98aee-dirty'
DISTRIB_TAINTS='no-all busybox'
root@OpenWrt:~#
-----Original Message-----
From: Sven Eckelmann <sven@narfation.org>
Sent: Wednesday, February 6, 2019 1:14 PM
To: b.a.t.m.a.n@lists.open-mesh.org
Cc: beth.flippo@telegrid.com; s.pinsky@telegrid.com
Subject: Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
On Wednesday, 6 February 2019 17.56.00 CET beth.flippo@telegrid.com wrote:
[...]
> I am having a problem getting alfred retrieve info from other nodes.
> I am running openwrt and alfred 2018.0.
Which OpenWrt version should that be? There is no release with 2018.0 and
the current version in master is also newer.
> I am able to start the alfred server with no errors both from boot and
> the command line.
>
> root@OpenWrt:~# /etc/init.d/alfred restart
> /etc/init.d/alfred: waiting 30 secs for br-lan address...
> /etc/init.d/alfred: starting alfred
> /etc/init.d/alfred: starting batadv-vis
>
> I can see it with ps
>
> 4290 root 816 S /usr/sbin/alfred -i br-lan -m -b bat0
>
> I can issue a set and then a receive and I see the value I set but
> only locally. It does not get any info from the other nodes in my
> network. They are all running alfred servers as master.
Have you checked whether process_alfred_announce_master (recv.c) rejects the
incoming packet for some reason and thus doesn't add it to the server list?
If not, have you checked whether sync_data (send.c) really sends out the
data via push_data to the remote server?
> I have added a firewall rule to open the port.
>
> If I have 2 nodes running alfred and I run 'tcpdump -i br-lan udp port
> 16962' - I see packets from the other node:
>
> 16:21:49.279086 IP6 fe80::2d0:12ff:fe00:f0c7.16962 > ip6-allnodes.16962:
> UDP, length 4
[...]
> I think these might be the master announcements but when I issue an
> alfred -r # - I do not see any new messages in the tcpdump.
If all daemons are in server mode then they will not create a request via
`alfred -r`. Instead, they regularly sync [1] their facts between each other
(same port but different packet type).
Kind regards,
Sven
[1]
https://www.open-mesh.org/projects/alfred/wiki/Alfred_architecture#Synchroni
zation
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
2019-02-06 18:47 ` beth.flippo
@ 2019-02-06 19:03 ` Simon Wunderlich
2019-02-08 15:58 ` beth.flippo
0 siblings, 1 reply; 6+ messages in thread
From: Simon Wunderlich @ 2019-02-06 19:03 UTC (permalink / raw)
To: b.a.t.m.a.n; +Cc: beth.flippo, 'Sven Eckelmann', s.pinsky
[-- Attachment #1: Type: text/plain, Size: 3795 bytes --]
Hi Beth,
as Sven said, if both nodes are running in master mode then they should
regularly synchronize their data. This happens by sending unicast (!) UDP
packets to their respective link-local IPv6 addresses. In your dump, we can
only see broadcasts of 4 bytes, most likely the announcements. But as you
said, two different hosts are sending those announcements, so that part seems
to work.
Since announcement from both ends are visible, it could still be that your
firewall drops it. Did you try disabling the firewall completely (e.g. /etc/
init.d/firewall stop, iptable -F etc ...)?
If that doesn't help, the best way would be to instrument the code (recv.c as
Sven suggested) to see if the announcements are received. we don't really have
debug code there.
Cheers,
Simon
On Wednesday, February 6, 2019 1:47:14 PM CET beth.flippo@telegrid.com wrote:
> We are using a gateworks board and built the latest version from their bsp
> but we had batman-adv, batctl and Alfred ipk built at version 2018.0.
> Batman and batctl are both working.
>
> root@OpenWrt:~# uname -a
> Linux OpenWrt 4.4.0 #16 SMP Tue Jan 29 19:41:46 UTC 2019 armv7l GNU/Linux
> root@OpenWrt:~# cat /etc/openwrt_release DISTRIB_ID='Gateworks'
> DISTRIB_RELEASE='Gateworks Ventana 16.02@dd98aee-dirty'
> DISTRIB_REVISION='r48868'
> DISTRIB_CODENAME='designated_driver'
> DISTRIB_TARGET='imx6/generic'
> DISTRIB_DESCRIPTION='Gateworks Designated Driver Gateworks Ventana
> 16.02@dd98aee-dirty'
> DISTRIB_TAINTS='no-all busybox'
> root@OpenWrt:~#
>
>
>
> -----Original Message-----
> From: Sven Eckelmann <sven@narfation.org>
> Sent: Wednesday, February 6, 2019 1:14 PM
> To: b.a.t.m.a.n@lists.open-mesh.org
> Cc: beth.flippo@telegrid.com; s.pinsky@telegrid.com
> Subject: Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
>
> On Wednesday, 6 February 2019 17.56.00 CET beth.flippo@telegrid.com wrote:
> [...]
>
> > I am having a problem getting alfred retrieve info from other nodes.
> > I am running openwrt and alfred 2018.0.
>
> Which OpenWrt version should that be? There is no release with 2018.0 and
> the current version in master is also newer.
>
> > I am able to start the alfred server with no errors both from boot and
> > the command line.
> >
> > root@OpenWrt:~# /etc/init.d/alfred restart
> > /etc/init.d/alfred: waiting 30 secs for br-lan address...
> > /etc/init.d/alfred: starting alfred
> > /etc/init.d/alfred: starting batadv-vis
> >
> > I can see it with ps
> >
> > 4290 root 816 S /usr/sbin/alfred -i br-lan -m -b bat0
> >
> > I can issue a set and then a receive and I see the value I set but
> > only locally. It does not get any info from the other nodes in my
> > network. They are all running alfred servers as master.
>
> Have you checked whether process_alfred_announce_master (recv.c) rejects the
> incoming packet for some reason and thus doesn't add it to the server list?
>
> If not, have you checked whether sync_data (send.c) really sends out the
> data via push_data to the remote server?
>
> > I have added a firewall rule to open the port.
> >
> > If I have 2 nodes running alfred and I run 'tcpdump -i br-lan udp port
> > 16962' - I see packets from the other node:
> >
> > 16:21:49.279086 IP6 fe80::2d0:12ff:fe00:f0c7.16962 > ip6-allnodes.16962:
> > UDP, length 4
>
> [...]
>
> > I think these might be the master announcements but when I issue an
> > alfred -r # - I do not see any new messages in the tcpdump.
>
> If all daemons are in server mode then they will not create a request via
> `alfred -r`. Instead, they regularly sync [1] their facts between each other
> (same port but different packet type).
>
> Kind regards,
> Sven
>
> [1]
> https://www.open-mesh.org/projects/alfred/wiki/Alfred_architecture#Synchroni
> zation
[-- Attachment #2: This is a digitally signed message part. --]
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
2019-02-06 19:03 ` Simon Wunderlich
@ 2019-02-08 15:58 ` beth.flippo
2019-02-08 17:26 ` Sven Eckelmann
0 siblings, 1 reply; 6+ messages in thread
From: beth.flippo @ 2019-02-08 15:58 UTC (permalink / raw)
To: 'Simon Wunderlich', b.a.t.m.a.n
Cc: 'Sven Eckelmann', s.pinsky
Hi -
So I added a lot of debug in both send.c and recv.c. Turns out that only
multicast works - unicast does not. When I changed the destination on push
packets to the Alfred multicast address then they were received on the other
side.
Unicast does not produce any errors at the sendto function and looks like it
is working but tcpdump doesn't see it and nothing gets to the receive side.
Tcpdump does see the multicast announcement packets.
I have a ton of output from netstat and tcpdump but I don't think it is
really useful to throw at you guys.
We are still googling it over here but at least we know it is on the send
side and not a firewall issue on the receive side.
Any idea why this would happen? Anything thing we should try?
Thanks again for the help!
Beth
-----Original Message-----
From: Simon Wunderlich <sw@simonwunderlich.de>
Sent: Wednesday, February 6, 2019 2:03 PM
To: b.a.t.m.a.n@lists.open-mesh.org
Cc: beth.flippo@telegrid.com; 'Sven Eckelmann' <sven@narfation.org>;
s.pinsky@telegrid.com
Subject: Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
Hi Beth,
as Sven said, if both nodes are running in master mode then they should
regularly synchronize their data. This happens by sending unicast (!) UDP
packets to their respective link-local IPv6 addresses. In your dump, we can
only see broadcasts of 4 bytes, most likely the announcements. But as you
said, two different hosts are sending those announcements, so that part
seems to work.
Since announcement from both ends are visible, it could still be that your
firewall drops it. Did you try disabling the firewall completely (e.g. /etc/
init.d/firewall stop, iptable -F etc ...)?
If that doesn't help, the best way would be to instrument the code (recv.c
as Sven suggested) to see if the announcements are received. we don't really
have debug code there.
Cheers,
Simon
On Wednesday, February 6, 2019 1:47:14 PM CET beth.flippo@telegrid.com
wrote:
> We are using a gateworks board and built the latest version from their
> bsp but we had batman-adv, batctl and Alfred ipk built at version 2018.0.
> Batman and batctl are both working.
>
> root@OpenWrt:~# uname -a
> Linux OpenWrt 4.4.0 #16 SMP Tue Jan 29 19:41:46 UTC 2019 armv7l
> GNU/Linux root@OpenWrt:~# cat /etc/openwrt_release DISTRIB_ID='Gateworks'
> DISTRIB_RELEASE='Gateworks Ventana 16.02@dd98aee-dirty'
> DISTRIB_REVISION='r48868'
> DISTRIB_CODENAME='designated_driver'
> DISTRIB_TARGET='imx6/generic'
> DISTRIB_DESCRIPTION='Gateworks Designated Driver Gateworks Ventana
> 16.02@dd98aee-dirty'
> DISTRIB_TAINTS='no-all busybox'
> root@OpenWrt:~#
>
>
>
> -----Original Message-----
> From: Sven Eckelmann <sven@narfation.org>
> Sent: Wednesday, February 6, 2019 1:14 PM
> To: b.a.t.m.a.n@lists.open-mesh.org
> Cc: beth.flippo@telegrid.com; s.pinsky@telegrid.com
> Subject: Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
>
> On Wednesday, 6 February 2019 17.56.00 CET beth.flippo@telegrid.com wrote:
> [...]
>
> > I am having a problem getting alfred retrieve info from other nodes.
> > I am running openwrt and alfred 2018.0.
>
> Which OpenWrt version should that be? There is no release with 2018.0
> and the current version in master is also newer.
>
> > I am able to start the alfred server with no errors both from boot
> > and the command line.
> >
> > root@OpenWrt:~# /etc/init.d/alfred restart
> > /etc/init.d/alfred: waiting 30 secs for br-lan address...
> > /etc/init.d/alfred: starting alfred
> > /etc/init.d/alfred: starting batadv-vis
> >
> > I can see it with ps
> >
> > 4290 root 816 S /usr/sbin/alfred -i br-lan -m -b bat0
> >
> > I can issue a set and then a receive and I see the value I set but
> > only locally. It does not get any info from the other nodes in my
> > network. They are all running alfred servers as master.
>
> Have you checked whether process_alfred_announce_master (recv.c)
> rejects the incoming packet for some reason and thus doesn't add it to the
server list?
>
> If not, have you checked whether sync_data (send.c) really sends out
> the data via push_data to the remote server?
>
> > I have added a firewall rule to open the port.
> >
> > If I have 2 nodes running alfred and I run 'tcpdump -i br-lan udp
> > port 16962' - I see packets from the other node:
> >
> > 16:21:49.279086 IP6 fe80::2d0:12ff:fe00:f0c7.16962 > ip6-allnodes.16962:
> > UDP, length 4
>
> [...]
>
> > I think these might be the master announcements but when I issue an
> > alfred -r # - I do not see any new messages in the tcpdump.
>
> If all daemons are in server mode then they will not create a request
> via `alfred -r`. Instead, they regularly sync [1] their facts between
> each other (same port but different packet type).
>
> Kind regards,
> Sven
>
> [1]
> https://www.open-mesh.org/projects/alfred/wiki/Alfred_architecture#Syn
> chroni
> zation
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [B.A.T.M.A.N.] Alfred problem reading other nodes
2019-02-08 15:58 ` beth.flippo
@ 2019-02-08 17:26 ` Sven Eckelmann
0 siblings, 0 replies; 6+ messages in thread
From: Sven Eckelmann @ 2019-02-08 17:26 UTC (permalink / raw)
To: beth.flippo; +Cc: 'Simon Wunderlich', b.a.t.m.a.n, s.pinsky
On Friday, 8 February 2019 16.58.46 CET beth.flippo@telegrid.com wrote:
[...]
> Unicast does not produce any errors at the sendto function and looks like it
> is working but tcpdump doesn't see it and nothing gets to the receive side.
> Tcpdump does see the multicast announcement packets.
You could try to use perf to figure out where the packet might have been lost.
Here here for example some output when I use
`ip6tables -t filter -P OUTPUT DROP` and then try to ping something via:
sudo perf ftrace ping -6 google.de > test
Of course, it doesn't give you a direct answer but you can at least try to
make an educated guess by searching for the position when the skb is freed:
34843 3) | ip6_send_skb() {
34844 3) | ip6_local_out() {
34845 3) | __ip6_local_out() {
34846 3) | nf_hook_slow() {
34847 3) | nft_do_chain_ipv6 [nf_tables]() {
34848 3) 0.146 us | ipv6_find_hdr();
34849 3) 0.602 us | nft_do_chain [nf_tables]();
34850 3) 1.259 us | }
34851 3) | kfree_skb() {
34852 3) | skb_release_all() {
34853 3) | skb_release_head_state() {
34854 3) 0.105 us | dst_release();
34855 3) | sock_wfree() {
34856 3) 0.271 us | sock_def_write_space();
34857 3) 0.505 us | }
34858 3) 1.072 us | }
34859 3) | skb_release_data() {
34860 3) | skb_free_head() {
34861 3) 0.103 us | kfree();
34862 3) 0.294 us | }
34863 3) 0.533 us | }
34864 3) 2.016 us | }
34865 3) | kfree_skbmem() {
34866 3) 0.150 us | kmem_cache_free();
34867 3) 0.333 us | }
34868 3) 2.629 us | }
34869 3) 4.498 us | }
34870 3) 4.781 us | }
34871 3) 4.968 us | }
34872 3) 5.168 us | }
34873 3) 7.532 us | }
And without this filter, the function continues and at the end it is queued up
in the ethernet HW and at some point really given to the ethernet driver
(e1000_xmit_frame).
7) | ip6_send_skb() {
7) | ip6_local_out() {
7) | __ip6_local_out() {
7) | nf_hook_slow() {
7) | nft_do_chain_ipv6 [nf_tables]() {
7) 0.221 us | ipv6_find_hdr();
7) 0.529 us | nft_do_chain [nf_tables]();
7) 1.405 us | }
7) 1.966 us | }
7) 2.354 us | }
7) | ip6_output() {
7) | ip6_finish_output() {
7) 0.785 us | __cgroup_bpf_run_filter_skb();
7) 0.581 us | ip6_mtu();
7) | ip6_finish_output2() {
7) | neigh_resolve_output() {
7) | eth_header() {
7) 0.538 us | skb_push();
7) 1.858 us | }
7) | dev_queue_xmit() {
7) | __dev_queue_xmit() {
7) 0.541 us | dst_release();
7) 0.903 us | netdev_pick_tx();
7) | pfifo_fast_enqueue() {
7) 0.585 us | _raw_spin_lock();
7) 1.892 us | }
7) 0.583 us | _raw_spin_trylock();
7) | __qdisc_run() {
7) 1.029 us | pfifo_fast_dequeue();
7) 0.858 us | pfifo_fast_dequeue();
7) | sch_direct_xmit() {
7) | validate_xmit_skb_list() {
7) | validate_xmit_skb() {
7) | netif_skb_features() {
7) 0.537 us | passthru_features_check();
7) 0.518 us | skb_network_protocol();
7) 2.956 us | }
7) 0.579 us | validate_xmit_xfrm();
7) 5.413 us | }
7) 6.473 us | }
7) 0.434 us | _raw_spin_lock();
7) | dev_hard_start_xmit() {
7) | dev_queue_xmit_nit() {
7) | skb_clone() {
7) | kmem_cache_alloc() {
7) 0.563 us | should_failslab();
7) 0.540 us | memcg_kmem_put_cache();
7) 2.755 us | }
7) | __skb_clone() {
7) 0.681 us | __copy_skb_header();
7) 1.915 us | }
7) 6.311 us | }
7) 0.721 us | ktime_get_with_offset();
7) | packet_rcv() {
7) 1.027 us | skb_push();
7) | __bpf_prog_run32() {
7) 2.280 us | ___bpf_prog_run();
7) 3.418 us | }
7) | consume_skb() {
7) | skb_release_all() {
7) 0.668 us | skb_release_head_state();
7) 0.615 us | skb_release_data();
7) 2.927 us | }
7) | kfree_skbmem() {
7) 0.712 us | kmem_cache_free();
7) 1.705 us | }
7) 6.126 us | }
7) + 13.655 us | }
7) + 23.417 us | }
7) | e1000_xmit_frame [e1000e]() {
7) 0.723 us | e1000_maybe_stop_tx [e1000e]();
7) 0.711 us | swiotlb_map_page();
7) 0.542 us | swiotlb_dma_mapping_error();
7) 0.444 us | e1000_maybe_stop_tx [e1000e]();
7) 6.934 us | }
7) + 32.409 us | }
7) + 41.556 us | }
7) 0.572 us | pfifo_fast_dequeue();
7) + 47.066 us | }
7) 0.574 us | __local_bh_enable_ip();
7) + 56.331 us | }
7) + 57.439 us | }
7) + 61.122 us | }
7) 0.588 us | __local_bh_enable_ip();
7) + 63.722 us | }
You can also see this successful transmit in the net tracepoints:
sudo perf trace --syscalls -e 'net:*' -e 'skb:*' ping google.de
[...]
7013.921 ( ): ping/18832 sendto(fd: 4<socket:[266397]>, buff: 0x558076ff39c0, len: 64, flags: CONFIRM, addr: 0x558076ff1940, addr_len: 28) ...
7013.962 ( ): net:net_dev_queue:dev=enp0s31f6 skbaddr=0xffff94a2328e2e00 len=118
7013.981 ( ): skb:consume_skb:skbaddr=0xffff94a2328e3f00
7013.994 ( ): net:net_dev_start_xmit:dev=enp0s31f6 queue_mapping=0 skbaddr=0xffff94a2328e2e00 vlan_tagged=0 vlan_proto=0x0000 vlan_tci=0x0000 protocol=0x86dd ip_summed=0 len=118 data_len=0 network_offset=14 transport_offset_valid=1 transport_offset=54 tx_flags=0 gso_size=0 gso_segs=0 gso_type=0
7014.006 ( ): net:net_dev_xmit:dev=enp0s31f6 skbaddr=0xffff94a2328e2e00 len=118 rc=0
7013.921 ( 0.094 ms): ping/18832 ... [continued]: sendto()) = 64
64 bytes from prg03s06-in-x03.1e100.net (2a00:1450:4014:80d::2003): icmp_seq=8 ttl=55 time=42.5 ms
7014.024 ( ): ping/18832 recvmsg(fd: 4<socket:[266397]>, msg: 0x7ffcc8a9d000 ) ...
7056.519 ( ): skb:skb_copy_datagram_iovec:skbaddr=0xffff94a208eeac00 len=64
7056.525 ( ): skb:consume_skb:skbaddr=0xffff94a208eeac00
7014.024 (42.504 ms): ping/18832 ... [continued]: recvmsg()) = 64
For the filtered testcase you can see the kfree_skb:
9221.434 ( ): ping/18913 sendto(fd: 4<socket:[259911]>, buff: 0x5561881769c0, len: 64, addr: 0x556188174940, addr_len: 28) ...
9221.473 ( ): skb:kfree_skb:skbaddr=0xffff94a2382df600 protocol=34525 location=0xffffffff9701a307
Kind regards,
Sven
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-02-08 17:26 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2019-02-06 16:56 [B.A.T.M.A.N.] Alfred problem reading other nodes beth.flippo
2019-02-06 18:14 ` Sven Eckelmann
2019-02-06 18:47 ` beth.flippo
2019-02-06 19:03 ` Simon Wunderlich
2019-02-08 15:58 ` beth.flippo
2019-02-08 17:26 ` Sven Eckelmann
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