netdev - Re: vxlan/veth performance issues on net.git + latest kernels

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Date:	Tue, 3 Dec 2013 23:39:43 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Or Gerlitz <or.gerlitz@...il.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>,
	Joseph Gasparakis <joseph.gasparakis@...el.com>,
	Jerry Chu <hkchu@...gle.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Pravin B Shelar <pshelar@...ira.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: vxlan/veth performance issues on net.git + latest kernels

On Wed, Dec 04, 2013 at 12:35:37AM +0200, Or Gerlitz wrote:
> Sorry, it doesn't help, I get the same error even with the oerf
> kernel.org tree which has these events (no sign for skb's)
> 
> 
> List of pre-defined events (to be used in -e):
>   cpu-cycles OR cycles                               [Hardware event]
>   instructions                                       [Hardware event]
>   cache-references                                   [Hardware event]
>   cache-misses                                       [Hardware event]
>   branch-instructions OR branches                    [Hardware event]
>   branch-misses                                      [Hardware event]
>   bus-cycles                                         [Hardware event]
>   stalled-cycles-frontend OR idle-cycles-frontend    [Hardware event]
>   stalled-cycles-backend OR idle-cycles-backend      [Hardware event]
>   ref-cycles                                         [Hardware event]
> 
>   cpu-clock                                          [Software event]
>   task-clock                                         [Software event]
>   page-faults OR faults                              [Software event]
>   context-switches OR cs                             [Software event]
>   cpu-migrations OR migrations                       [Software event]
>   minor-faults                                       [Software event]
>   major-faults                                       [Software event]
>   alignment-faults                                   [Software event]
>   emulation-faults                                   [Software event]
> 
>   L1-dcache-loads                                    [Hardware cache event]
>   L1-dcache-load-misses                              [Hardware cache event]
>   L1-dcache-stores                                   [Hardware cache event]
>   L1-dcache-store-misses                             [Hardware cache event]
>   L1-dcache-prefetches                               [Hardware cache event]
>   L1-dcache-prefetch-misses                          [Hardware cache event]
>   L1-icache-loads                                    [Hardware cache event]
>   L1-icache-load-misses                              [Hardware cache event]
>   L1-icache-prefetches                               [Hardware cache event]
>   L1-icache-prefetch-misses                          [Hardware cache event]
>   LLC-loads                                          [Hardware cache event]
>   LLC-load-misses                                    [Hardware cache event]
>   LLC-stores                                         [Hardware cache event]
>   LLC-store-misses                                   [Hardware cache event]
>   LLC-prefetches                                     [Hardware cache event]
>   LLC-prefetch-misses                                [Hardware cache event]
>   dTLB-loads                                         [Hardware cache event]
>   dTLB-load-misses                                   [Hardware cache event]
>   dTLB-stores                                        [Hardware cache event]
>   dTLB-store-misses                                  [Hardware cache event]
>   dTLB-prefetches                                    [Hardware cache event]

Is this the whole output of perf list? Then you seem to be missing some
tracepoint options, CONFIG_TRACEPOINTS e.g.?

I can confirm it works for me on a current net build.

Greetings,

  Hannes

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