https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
Vincenzo Maffione changed:
What|Removed |Added
Assignee|n...@freebsd.org |vmaffi...@freebsd.org
---
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #13 from Vincenzo Maffione ---
(In reply to vistalba from comment #12)
I started to work on it, however I've no suitable hardware to test.
This means that I will need to patch qemu to modify the emulation of an
iflib-backed
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
vistalba changed:
What|Removed |Added
CC||regis...@kad-it.ch
--- Comment #12
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #11 from Vincenzo Maffione ---
(In reply to Eric Joyner from comment #10)
Not yet. I've been AFK for a couple of weeks. I should be able to work on it
this week.
--
You are receiving this mail because:
You are the assignee
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
Eric Joyner changed:
What|Removed |Added
CC||e...@freebsd.org
--- Comment #10
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #9 from Vincenzo Maffione ---
Thanks a lot for the tests.
I think the way netmap tx is handled right now needs improvement.
As far as I can tell, in your setup TX interrupts are simply not used (ix and
ixl seem to use softirq
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #8 from Sylvain Galliano ---
After looking at iflib_netmap_timer_adjust() & iflib_netmap_txsync() in
sys/net/iflib.c,
I made some tuning on kern.hz:
Still using X520 with 1 queue
ix0: PCI Express Bus: Speed 5.0GT/s Width x8
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #7 from Vincenzo Maffione ---
(In reply to Kubilay Kocak from comment #6)
I would say
ix/ixl and/or NIC driver & iflib
because it's not something related to the netmap module itself, and it is an
optimization which derives
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #6 from Kubilay Kocak ---
(In reply to Vincenzo Maffione from comment #5)
Is this more specific/scoped to:
- netmap & iflib, or
- ix/ixl and/or NIC driver & iflib, or
- iflib framework (generally)
--
You are receiving
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #5 from Vincenzo Maffione ---
Ok, thanks for the feedback. That means that the issue is that iflib is not
asking enough TX descriptor writebacks. Need for some investigation in the
iflib txsync routine.
--
You are receiving
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #4 from Sylvain Galliano ---
You're right, interrupt rate limit pps on CURRENT + X520 NIC:
pkt-gen, no busy wait
11-stable: 27500 irq/s
CURRENT:5500 irq/s
pkt-gen, with busy wait on CURRENT: +3 irq/s
Regarding NIC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #3 from Vincenzo Maffione ---
It looks like you get 2.6 Mpps because you are not getting enough interrupts...
have you tried to measure the interrupt rate in the two cases (current vs 11,
no busy wait)?
Intel NICs have tunables
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
Kubilay Kocak changed:
What|Removed |Added
Keywords||iflib
Flags|
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #2 from Sylvain Galliano ---
Hi Vincenzo, thanks for your quick reply.
I've disabled all offloads in both 11-STABLE and CURRENT and I got the same
results.
I did another test that may help you:
I've recompiled pkt-gen on
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
--- Comment #1 from Vincenzo Maffione ---
Thanks for reporting.
What I can tell you for sure is that the difference is to be attributed to the
conversion of Intel drivers (em, ix, ixl) to iflib.
This impacted netmap because netmap support
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
Kubilay Kocak changed:
What|Removed |Added
Summary|[netmap]: pkt-gen tx huge |netmap: pkt-gen TX huge pps
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248652
Kubilay Kocak changed:
What|Removed |Added
CC||n...@freebsd.org,
17 matches
Mail list logo
