FYI for the iovisor-dev subscribers. Alexei and I were given a heads
up on this ahead of time and given a chance to find a service other
than groups.io, but it seemed like a reasonable change that LF is
making so we decided to let this proceed. Hopefully it works out fine!
This will likely be happe
Hi all,
Thanks for joining in the discussion today. As usual, here are my notes.
-Brenden
=== Discussion ===
Brenden:
- Adding fedora 28 buildbot/packages
- debugging some test failures
- Tag release 0.7.0 after that
Yonghong:
- Some more python3 fixes
- Some rewriter changes, breakages
- T
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Hi All,
Thanks for attending the meeting today. As usual, here are my notes.
=== Discussion ===
Bjorn
- AF_XDP zero copy implementation RFC on netdev
- some uapi concerns, may need to back out changes
- but, over next couple weeks before merge window, discuss and improve in
hopes of me
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Hi All,
Thanks for joining the discussion today. As usual, here are my notes.
-Brenden
=== Discussion ===
John:
- sockmap fixes pushed
- fixed broken tests
- sockmap hash impl next
- bounded loop rfc making progress
- cilium code using sockhash almost finished as well
Yonghong:
- python3 tes
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Hi All,
Thanks for attending the meeting today. As usual, here are my notes.
Cheers,
Brenden
=== Discussion ===
Alexei
- bpf-next queue is quite large, please have patience with delays in
clearing
the backlog
- please help review others patches
Brenden
- Fixing image test issues in bcc
- To
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Hi All,
Thanks for attending the meeting today. Here are my notes from the call.
Cheers,
Brenden
=== Status ===
Yonghong
- Debugging incorrect user stack
- fastpath vs slowpath register difference
- should be updated in 4.9+ (LTS flavors)
- user stack id - doesn't have full access, trying t
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Hi all,
Thanks for joining the discussion today, as usual my notes of the discussion
are included below.
Cheers,
Brenden
=== Discussion ===
Alexei
- microkernel/umh work - see lkml
Yonghong
- working on skb segmentation problem
- ipv4/v6 transition
- bpf on bpf clsact ingress
Brenden
- bc
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Hi all,
Thanks for joining the call today! Please see my notes from the
discussion included below.
=== Status ===
Sargun:
seccomp-ebpf - verifier hurdles
- wants synchronous filtering as minimum feature to allow the verifier risk
- current rcu locking approach was nacked
discussion about how bpf
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Hi all,
Thanks for attending the call this week. My notes are included below.
=== Updates ===
DTrace GPLed in Dec 2017
- To help with Oracle Linux port
- Should we take dtrace kernel code into linux?
- opinion: probably not necessary now, more applicable 5 years ago
- How about dtrace frontend
On Wed, Feb 21, 2018 at 11:55 AM, Brenden Blanco wrote:
> Hi all,
>
> Thanks for attending the call this week. My notes are included below.
>
> === Updates ===
>
> DTrace GPLed in Dec 2017
> - To help with Oracle Linux port
> - Should we take dtrace kernel code into linux?
> - opinion: probably
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Hi All,
Thanks for joining the call today. As usual, here are my notes.
=== Status ===
Yonghong:
- Bug fixes
- Python 2/3 becoming default
- Tools need some fixes
- Brenden has some patches in a branch to address this
JohnF:
- Fixes for sockmap
- socket cleanup wasn't working correctly
-
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Hi All,
Thanks for attending the meeting today. As usual, here are my notes.
-Brenden
=== Status ===
Alexei:
- Closing last minute fixes for 4.15
- expect stable fixes to follow
Yonghong:
- Add some trace examples
- addressing recurring questions about how to use generic tools
- Fix trace p
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Hi All,
Thanks for attending today. Below you will find my notes from the call.
Cheers,
Brenden
=== Status ===
Alexei:
- Security updates for BPF
- Patching uses of BPF for speculative execution
- variant 1, one more patch in progress
- variant 2, option to toggle off interpreter
Yonghong:
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Thanks all for attending today. Below you may find the notes from the call. We
will be skipping the next call and resuming on Jan 10. See you all in the new
year!
=== Status ===
Yonghong:
- bcc: Fixed struct with alignment/int128 quirks
- match in python
- kernel: query prog array
- used for e
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Thanks all for attending the meeting today. Here are the notes from
the discussion.
=== Status Updates ===
Brenden:
- Adding f26 f27 and ubuntu1710 bcc buildbots
- Creating 0.5.0 tag
Jesper:
- XDP receive queue information
- tedious to add info because every driver needs update
- add pointer
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Hi All,
Thanks for attending the call this week, as usual here are the notes of the
discussions and updates.
=== Netdev ===
LWN summary article for Netconf+Netdev is available:
https://lwn.net/Articles/738912/
Discussions:
- XDP cpumaps
- XDP offload
- How to offload xdp metadata hints?
-
Please note, California observes daylight saving time, and hence the
time for some timezones may have changed since last meeting. Please
confirm using the timeanddate.com link at the bottom.
Please join us tomorrow for our bi-weekly call. As usual, this meeting is
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Hi All,
Thanks for attending the meeting today, here are my notes.
=== Status ===
Netdev 2.2 next week
- Live streaming available
- link to be sent out when available
Brenden:
- Increase cadence for updating package version
- todo: update 0.4.1
Alexei:
- Work proceeds on call between progra
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Hi Asif,
The repo server has a certificate from Lets Encrypt. I would check with the
list of CAs installed in your distro to confirm that Lets Encrypt is
supported, and Google around for packages to update from.
On Wed, Oct 25, 2017 at 7:06 PM, Haswarey, Asif via iovisor-dev <
iovisor-dev@lists.i
Hi All,
Thanks for attending the call today. Below are my notes.
=== Status ===
Alexei:
- 1 patch / day
- burdensome on alexei/daniel
- how to scale?
- to be discussed at netconf
- working on calls
- can load relatively large files
- rfc to come before netdev
- memory pressure in the v
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Hi all,
Thanks for attending the call today. Here are my notes. Also, please be advised
that we will be moving to a 30 min time slot going forward.
=== Status ===
Yonghong:
- Added source debugging printer for bcc
- Requires 6.0 (possible but needs volunteers to backport to 5.0)
- Permit multi
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Hi All,
Thanks for attending the call yesterday, here are my notes:
=== News ===
Linux Plumbers was last week, and included an increasing focus on BPF for
tracing and other use cases over previous years. The tracing/BPF track on Friday
had a very packed agenda, only allowing 10-15 minutes per t
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Hi All,
Thanks for attending the call today. Here are the notes from the meeting.
Netdev 1.2
reminder: paper submissions
deadline is Sept 20
Linux Plumbers microconference (next week)
If you have volunteered to lead discussion of a topic, Alexei would like to
remind you that we don't want to be
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On Thu, Aug 24, 2017 at 12:25 PM, Y Song wrote:
> On Thu, Aug 24, 2017 at 12:17 PM, Ilya Baldin wrote:
>> Thank you, everyone for the replies. This explains about bpf_probe_read.
>>
>> I tried the approach below (changed the check to offset +1) however that
>> didn’t help, I still get the same er
On Thu, Aug 24, 2017 at 9:26 AM, Daniel Borkmann via iovisor-dev
wrote:
> On 08/24/2017 06:17 PM, Y Song wrote:
>>
>> CC to bcc mailing list as well.
>>
>> bpf_probe_read is not allowed in XDP programs.
>>
>> Your comparison may need to comparison not just starting offset, but
>> also including th
Hi All,
Thanks for joining in to the call today. We shared a round of updates, which are
included in the notes below.
Also please remember that Plumbers is right around the corner! If you have
signed up to lead discussion of a topic at the Tracing+BPF microconference,
Alexei would like to have a
Adds ability to attach a BPF program to a pktgen thread. The program
should fill in the contents of each packet from scratch, including
checksum.
The context passed in is currently in the form of xdp_md, with a fresh
skb underlying the data pointer and headroom equivalent to the pktgen
pktsize set
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Sorry about that! I'm out on vacation today and neglected to send a note
asking for somebody to fill in. Hopefully y'all figured out what was going
on.
-Brenden
On Aug 9, 2017 2:10 PM, "Brendan Gregg" wrote:
> Happening today?
>
> Brendan
>
> On Tue, Jul 25,
Hi All,
Thanks for joining the meeting today. Here are the notes!
=== Updates ===
Yonghong:
- allow >2 pids attach to same usdt probe - wip
- next: looking at uprobe performance
- looked into dyninst
- researched systemtap approach
- c prog compiled into .so
- instrumentation of bina
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Hi All,
Thanks for a great meeting today, lots of good discussions and updates! Here
are the notes for those that missed it.
Yonghong:
LLVM fixes:
- data/data_end comparison handling
- read only section improved
- proper handling of struct init
- please pick up llvm 5.0 to get them
(looking int
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Thanks all for attending the meeting this week, here are the notes.
Status updates:
John F:
Working on xdp redirect feature
- should be published in the next couple days
- redirect map type filled with indexes
- performance: tx vs redirect comparable
2 new op calls (redirect and flush)
Daniel
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On Wed, Jun 21, 2017 at 6:40 AM, Douglas Caetano dos Santos via
iovisor-dev wrote:
>
> Hi,
>
> We're starting to extensively use eBPF on our servers and we've got a couple
> of
> questions on specific internals that I hope you can help clarify.
>
> The problem we're trying to solve is this: we wa
Hi all,
Thanks for dialing in today, here are notes on what we discussed today.
Upcoming conferences
O'Reilly Velocity
Brendan and Sasha both giving talks on BPF
Open Source Summit North America
Sept 11-14, Los Angeles
4 BPF/XDP talks accepted
Linux Plumbers (shared/overlaps OSSNA)
Sept 13-15,
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Also, I would suggest that after that fix, we also update the test to
include actually testing for proper values. Probably you can send the
values over the perf ring buffer and assert at the end that all of the
values are collected properly.
On Tue, Jun 6, 2017 at 8:59 PM, Brenden Blanco wrote:
Yonghong, can you send a PR for your branch?
On Tue, Jun 6, 2017 at 12:20 AM, Y Song via iovisor-dev <
iovisor-dev@lists.iovisor.org> wrote:
> Hi, Tetsuo,
>
> You are right. The bug is actually introduced by my last patch. I just
> focused one aspect of issue and inadvertently introduced another
Hi All,
Thanks for joining the meeting today. Here are the notes!
=== Conferences ===
Reminder: CFP for Linux Plumbers
Please submit a topic for the Tracing Microconference!
http://wiki.linuxplumbersconf.org/2017:tracing
=== Technical Updates ===
Brenden:
Doing some code cleanups for BCC
- Th
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Hi All,
Thanks for attending the call today, here are the notes.
==
CFP for Linux Plumbers
Sept 13-15, Los Angeles
Tracing microconference accepted
(Alexei, Brendan, Josef leading topics)
http://wiki.linuxplumbersconf.org/2017:tracing
Last year was successful, looking forward to more topic
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Hi All,
Thanks for joining the meeting this week. Here are my notes from the meeting.
See you all in two weeks!
=== Conferences ===
Notes from Netdev 2.1
Lots of focus on BPF, XDP infra and use cases
Dave Miller:
XDP Keynote
working on generic netdev xdp support
xdp-newbies mailing list
Jesp
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Hi all,
Due to many members being out of town, some concurrently with the netdev
conference, the meeting today is cancelled. See you all again in two weeks!
-Brenden
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Hi All,
Thanks for joining the meeting this week. Here are some status updates
from various folks.
William:
Discussed issue he is having with the verifier/llvm
complex program becomes stack limited
as a workaround, tried using volatile modifier for some stack variables
but this causes the veri
WARNING: please note that California has recently observed Daylight
Saving Time, so remember to check your local time conversion.
WARNING 2: we're using Bluejeans instead of Webex this time.
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Hi all,
Thanks to those who attended, here are my minutes from the meeting.
= Conferences past and future =
IO Visor Summit
We had this last week, the conference room was packed and we had a few remote
attendees as well. We are working to upload the videos, collect the slides
(please sen
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No, really the only thing you are allowed to do from bpf on a prog
array is call() and delete(). It is a one-way street.
Unfortunately you will have to keep track of which programs are in
which slots from the userspace side entirely.
On Fri, Mar 3, 2017 at 12:52 AM, Tanja Ulmen via iovisor-dev
w
Hi Folks,
It looks like the link in the email for the global dial-in numbers got
filtered.
If you have trouble joining, please try one of the following:
https://www.myrcplus.com/cnums.asp?bwebid=8369444&ppc=6742974834&num=18667156501&num2=17193252777
Thanks,
Brenden
On Sat, Feb 25, 2017 at 6:34
Since we will be having the summit on Monday, I am cancelling
tomorrow's normally scheduled meeting. See you all next week!
FYI, we'll be posting the planned agenda shortly.
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IO Visor summit coming, please prepare abstracts if you have something
to discuss
=== Conferences ===
netdev conf coming up, talks needed
Jesper - performance workshop
DDoS topic
idea: reach out to nic vendors who support xdp
- future xdp direction
idea: dpdk work
idea: specifically, xdp ring t
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On Sat, Feb 4, 2017 at 6:25 PM, Daehyeok Kim via iovisor-dev
wrote:
> Hello,
>
> I am trying to use the eBPF map to share data between two different BPF
> modules.
> In eBPF module A, I defined a table using BPF_TABLE_PUBLIC ("hash",..,...) and
> in the other module B, I define a table using BPF_
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Hi All,
Thanks for attending this weeks meeting. Here are the bullet points:
IO Visor conf - Feb 27
- We are looking for papers/discussion topics for the workshop
Please send your ideas to dkal...@vmware.com
- If you aren't able to attend in person (please come if you can!) remote
access will
Happy New Year All!
Please join us for our first bi-weekly call of the year. As usual, this
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Yes, it would be helpful to share the code.
On Fri, Jan 6, 2017 at 12:34 PM, William Tu via iovisor-dev <
iovisor-dev@lists.iovisor.org> wrote:
> Hi,
>
> I'm adding parser and extra map lookup into the xdp1_kern.c and
> encounter this LLVM error. My environment:
> clang version 3.8.0-2ubuntu4 (t
Hi All, thanks for attending the call yesterday. Here are the minutes from
the meeting.
Recent conferences:
LISA - Brendan G - talk on bpf last week - standing room only
+ tutorial with Sasha G - 84 attendees
Upcoming conferences:
FOSDEM - Brussels early Feb
Kinvolk - submitted some bpf
Hi All,
Please join us for our bi-weekly call. This meeting is open to everybody
and completely optional.
*IOVisor TSC/Dev Meeting*
Every 2 weeks on Wednesday, from Wednesday, May 18, 2016, to no end date
11:00 am | Pacific Daylight Time (San Francisco, GMT-07:00) | 1 hr
*Join WebEx meeting*
On Mon, Dec 12, 2016 at 10:38 PM, Alexei Starovoitov <
alexei.starovoi...@gmail.com> wrote:
> On Mon, Dec 12, 2016 at 10:33 PM, Ming Lei wrote:
> > On Tue, Dec 13, 2016 at 2:11 PM, Alexei Starovoitov
> > wrote:
> >> On Mon, Dec 12, 2016 at 9:44 PM, Ming Lei
> wrote:
> >>>
> so you can send
Hi All,
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and completely optional.
*IOVisor TSC/Dev Meeting*
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Hi all,
Thanks for attending the meeting today. Below you will find my notes from
the
call. Hear you all in two weeks!
Brenden:
Overview of conferences over previous month
2 OpenStack presentations from PG and Huawei
https://www.youtube.com/watch
Hi All,
After a bit of a hiatus, please join us for our bi-weekly call. This
meeting is open to everybody and completely optional.
Note that the US has recently changed back from Daylight "Saving" Time
(silly concept), and so the meeting will take place at 19:00 GMT.
*IOVisor TSC/Dev Meeting*
Ev
A number of us are attending Linux Plumbers this week, so we will have the
next meeting 2 weeks from today. Sorry for the late notice.
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On Sat, Oct 29, 2016 at 1:27 AM, William Tu via iovisor-dev <
iovisor-dev@lists.iovisor.org> wrote:
> Hi,
>
> I'm trying to measure the performance of my BPF programs, which attach
> to clsact. As a start, I thought I could simply measure the cycles
> spent on cls_bpf_classify(), because it's the
Hi All,
Please join us for our bi-weekly call. This meeting is open to everybody
and completely optional.
*IOVisor TSC/Dev Meeting*
Every 2 weeks on Wednesday, from Wednesday, May 18, 2016, to no end date
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*Join WebEx meeting*
On Thu, Sep 15, 2016 at 08:14:02PM +0200, Jesper Dangaard Brouer wrote:
> Hi Brenden,
>
> I don't quite understand the semantics of the XDP userspace interface.
>
> We allow XDP programs to be (unconditionally) exchanged by another
> program, this avoids taking the link down+up and avoids realloc
Hi All,
Thanks for joining the call today, below you may find my notes.
Upcoming conference info:
netdev - Japan - early October
Alexei, Daniel B, Jesper voiced their ack that they would attend
Plumbers - Santa Fe - early November
https://www.linuxplumbersconf.org/2016/ocw/events/LPC2016/tracks
Hi All,
Please join us for our bi-weekly call. This meeting is open to everybody
and completely optional.
*IOVisor TSC/Dev Meeting*
Every 2 weeks on Wednesday, from Wednesday, May 18, 2016, to no end date
11:00 am | Pacific Daylight Time (San Francisco, GMT-07:00) | 1 hr
*Join WebEx meeting*
Hi All,
Unfortunately I won't be available to start the meeting today. We'll plan
to meet again in two weeks, in the meantime see you all on IRC and/or the
mailing lists!
Thanks,
Brenden
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On Fri, Aug 12, 2016 at 4:46 PM, Mark Drayton via iovisor-dev <
iovisor-dev@lists.iovisor.org> wrote:
> Here’s a version that works:
>
>
>
> https://gist.github.com/markdrayton/d077459b7ed23ce25bb3eff2d5e220ba
>
>
>
> It looks like SSL_read’s arguments aren’t available in a return probe so
> you n
Thank you all for joining today. Please find my notes from the meeting
below.
=== Works in progress ===
Tracing:
* add hw cache events reading support in PERF_EVENT_ARRAY (brenden)
* working on nmi support for bpf tracing (alexei)
- to attach programs when counters are firing (overflow wakeup_xx
On Tue, Aug 9, 2016 at 9:59 AM, riya khanna
wrote:
> On Tue, Aug 9, 2016 at 12:24 PM, Brenden Blanco
> wrote:
> >
> >
> > On Tue, Aug 9, 2016 at 9:16 AM, riya khanna
> > wrote:
> >>
> >> On Tue, Aug 9, 2016 at 12:05 PM, Brenden Blanco
> >> wrote:
> >> > On Tue, Aug 9, 2016 at 8:54 AM, riya kha
Hi All,
Please join us for our bi-weekly call. This meeting is open to everybody
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Every 2 weeks on Wednesday, from Wednesday, May 18, 2016, to no end date
11:00 am | Pacific Daylight Time (San Francisco, GMT-07:00) | 1 hr
*Join WebEx meeting*
On Tue, Aug 9, 2016 at 9:16 AM, riya khanna
wrote:
> On Tue, Aug 9, 2016 at 12:05 PM, Brenden Blanco
> wrote:
> > On Tue, Aug 9, 2016 at 8:54 AM, riya khanna
> > wrote:
> >>
> >> Hi Brenden,
> >>
> >> Saw test_perf_event.py in your branch. Its creates and enables per
> >> counters once during s
On Tue, Aug 9, 2016 at 8:54 AM, riya khanna
wrote:
> Hi Brenden,
>
> Saw test_perf_event.py in your branch. Its creates and enables per
> counters once during start. Is it also possible to
> enable/disable/reset counters on the fly? Perhaps we need a kernel
> patch for this?
>
It doesn't "create"
On Fri, Jul 29, 2016 at 10:21 AM, riya khanna
wrote:
> I'm testing perf counters on a 8-core machine.
>
> since BPF_PERF_ARRAY.perf_read(cpu) reads from local CPU, I'm
> aggregating counters across all cpus by doing:
>
> BPF_PERF_ARRAY(counter, 32);
>
> for (key = 0; key < 8; key++)
> counter
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