Date: Tue, 29 Nov 2016 12:52:18 +0100 From: Vincenzo Maffione <v.maffione@gmail.com> To: Steven Crangle <Steven@stream-technologies.com> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Looking for some help with netmap/bhyve Message-ID: <CA%2B_eA9jW_O_a5uRBAA9XSPspnwATrGhXM3NYusyXxemftn3uZw@mail.gmail.com> In-Reply-To: <DB5PR07MB168582129D05D52878D3DCE59B8D0@DB5PR07MB1685.eurprd07.prod.outlook.com> References: <DB5PR07MB1685DAA40193595950A464FB9BB40@DB5PR07MB1685.eurprd07.prod.outlook.com> <CA%2B_eA9gggyo_ncSZDribOr%2BsWoFELbPKEeLdaZ8AZwgHAYjcRA@mail.gmail.com> <DB5PR07MB168582129D05D52878D3DCE59B8D0@DB5PR07MB1685.eurprd07.prod.outlook.com>
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Hi Steven, Thanks for your testing this in HEAD, good news to know that it works ok! I think there is not going to be much difference between HEAD and 11.0, because in the end bhyve code didn't really change (for the parts I touched), and you need to use the latest netmap version (github) anyway, irrespective of whether you are testing on 10.3, 11.0, head, etc. In other words, you would be testing approximately the same code. Anyway, if you happen to test 11.0 by chance please let me know. What kind of tests did you perform? netmap applications (e.g. pkt-gen), or netperf/iperf standard TCP/IP tools? Could you please share the performance number you got for configurations (A) and (B) (or just the one you tried)? I think it is useful to compare your results with the ones I collected here (see the performance evaluation section): https://wiki.freebsd.org/DevSummit/201609?action=AttachFile&do=view&target=20160923-freebsd-summit-ptnet.pdf Regarding the crashes, thanks for reporting, I would be nice if you could describe in more detail how you trigger them (with some higher likelyhood); also, compiling the kernel with debug symbols should help in understanding which part of the code is involved in the crash. Cheers, Vincenzo 2016-11-29 12:26 GMT+01:00 Steven Crangle <Steven@stream-technologies.com>: > Hi Vincenzo! > > > Thank you so much for your help! With your instructions I've managed to > get a set of bhyves up and running with netmap working properly within > them! I chose to go with the recent version of head instead of 10.3. I > will also try and build a version on 11.0 if I get chance! > > > I will make sure and ask any further questions on the github page for > netmap, but while I'm emailing, I've attached a text file containing a few > kernel page fault errors I've ran into. They don't happen repeatedly. They > seem to just happen randomly if I try to shut the process down and possibly > catch netmap in an incorrect state! Figured they might be useful to you. If > I figure out what the error is myself I will try and help out! > > > And thanks again for your help! > > > Kind Regards > > > > > > > > ------------------------------ > > > > [image: Stream Logo] > > > > > > *Steven Crangle* > > Systems Developer | Stream Technologies | Glasgow, UK > > [image: http://www.stream-technologies.com/img/phone.png] > > +44 (0)844 800 8520 > > | > > [image: http://www.stream-technologies.com/img/mouse.png] > > www.stream-technologies.com > > > > > > ------------------------------ > *From:* Vincenzo Maffione <v.maffione@gmail.com> > *Sent:* 23 November 2016 08:33:11 > *To:* Steven Crangle > *Cc:* FreeBSD Net > *Subject:* Re: Looking for some help with netmap/bhyve > > > > 2016-11-22 11:31 GMT+01:00 Steven Crangle <Steven@stream-technologies.com> > : > >> >> Hi, >> >> >> I've recently been trying to boot up several bhyves so that I can test >> netmap communication between instances. The problem is, no matter what >> configuration I try, the guest vm running in bhyve completely hangs and >> becomes unusable as soon as a packet hits the netmap interface. When >> testing with pkt-gen, the TX side successfully starts sending packets, but >> the RX side will reliable freeze with the only option being killing the >> bhyve process. >> >> >> The bhyve command used for the above test was: >> >> >> bhyve -c 1 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/dev/zvol/zroot/viper1vol >> -s 3,virtio-net,tap0,mac=00:01:23:45:67:83 -s 4,virtio-net,tap4 -l >> com1,/dev/nmdm0A -A -H -P -m 6g viper1 & >> bhyve -c 1 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/dev/zvol/zroot/viper2vol >> -s 3,virtio-net,tap1,mac=00:01:23:45:67:84 -s 4,virtio-net,tap5 -l >> com1,/dev/nmdm1A -A -H -P -m 6g viper2 >> >> For this test the host OS was FreeBSD-11.0-p3 and the guest OS was >> FreeBSD-11.0-p3. >> >> After failing to get this solution working, I pulled down the source from >> the following url and installed it on the host box: >> >> https://svnweb.freebsd.org/socsvn/soc2016/vincenzo/head/ >> >> I then ran the following commands to try and bring up the machines using >> the ptnetmap interface (the guest still running 11.0p3) : >> >> bhyve -c 1 -s 0,hostbridge -s 1,lpc -s 1:1,virtio-blk,/dev/zvol/zroot/viper1vol >> -s 2:0,virtio-net,tap0,mac=00:01:23:45:67:83 -s 2:1,ptnetmap-memdev -s >> 2:2,ptnet,vale0:0 -l com1,/dev/nmdm0A -A -H -P -m 6g viper1 & >> bhyve -c 1 -s 0,hostbridge -s 1,lpc -s 1:1,virtio-blk,/dev/zvol/zroot/viper2vol >> -s 2:0,virtio-net,tap1,mac=00:01:23:45:67:84 -s 2:1,ptnetmap-memdev -s >> 2:2,ptnet,vale0:1 -l com1,/dev/nmdm1A -A -H -P -m 6g viper2 >> >> With the above commands the vm's fail to boot with the following message: >> >> ptnet_init: failed to get ptnetmap >> >> Output in /var/log/messages seems to just show the ptnetmap driver >> allocating one RX/TX ring for each vm, while bringing the device up, the >> device then goes down and the above error is seen in the console. >> >> Is there something I'm doing wrong with regards to running netmap or >> ptnetmap within a bhyve? Any pointers in the right direction will be much >> appreciated! >> >> Kind Regards >> >> Steven >> >> > Hi Steven, > > The code you are looking at is the final code released by my gsoc 2016 > project at the end of August 2016. However, I've been working on that for a > while after the gsoc, so that code is not updated anymore. My modification > basically involves two subsystems: netmap and bhyve. > > The updates to netmap are already available in HEAD. The updates to bhyve > are not yet upstream, as we are in the process to review that with the > bhyve maintainers. > > Anyway, you need two sources to get the latest code: > 1) https://github.com/luigirizzo/netmap for the latest netmap code, that > you could also compile as an external kernel module. > 2) https://github.com/vmaffione/freebsd to get the updates to bhyve (and > vmm.ko). You can use this as the host system. There are two branches here: > ptnet-10.3, and ptnet-head. My original code was developed under FreeBSD > 10.3, so a first possibility is to try this as the host system (using the > ptnet-10.3 branch). The other branch (ptnet-head) contains a porting of the > work to a recent version of HEAD. I would be very glad if you could test > the code also on FreeBSD 11. > > We support two combinations of bhyve networking with netmap: > > (A) virtio-net + netmap: that is something like "-s > 2:0,virtio-net,vale0:0" in the bhyve command line. > (B) ptnet + ptnetmap: that is something like "-s 2:1,ptnetmap-memdev -s > 2:2,ptnet,vale0:0" in the bhyve command line. > > so you may want to try A first (netmap backend in user-space, slower) and > then B (netmap backend in kernel-space, faster). > > Sorry about the confusion on the code repositories, I'll try also to > update the wiki page (and/or the gsoc svn repo) to reflect these updates. > It's perfectly ok for me to discuss these issues here in the ML, however > for more detailed/low-level discussion and support about problems you are > running into, feel free to open Github issues here > https://github.com/luigirizzo/netmap. > > Cheers, > Vincenzo > > > >> >> >> >> >> >> >> >> ________________________________ >> >> >> >> [Stream Logo] >> >> >> >> >> >> >> >> >> Steven Crangle >> >> >> Systems Developer | Stream Technologies | Glasgow, UK >> >> >> [http://www.stream-technologies.com/img/phone.png] >> >> >> +44 (0)844 800 8520 >> >> >> | >> >> >> [http://www.stream-technologies.com/img/mouse.png] >> >> >> www.stream-technologies.com<http://www.stream-technologies.com/>; >> >> >> >> >> >> >> _______________________________________________ >> freebsd-net@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-net >> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >> > > > > -- > Vincenzo Maffione > -- Vincenzo Maffione
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