Re: [PATCH v2 net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH

From	David Miller <davem@davemloft.net>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH
Date	2016-01-12 22:50 +0100
Message-ID	<qQeZe-6Mv-61@gated-at.bofh.it> (permalink)
References	<qQ2v0-6Gt-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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From: Martin KaFai Lau <kafai@fb.com>
Date: Tue, 12 Jan 2016 00:20:48 -0800

> BPF + kprobe is very useful in statistics collection.  In particular,
> bpf is strong in doing aggregation within the kernel instead of
> outputting a lot of raw samples to the userspace.
> 
> In some cases, bumping a counter/value of a particular key will have
> noticeable impact.  For example, doing statistics collection
> on received packets and aggregating them by network
> prefix (like /64 in IPv6).  Having a percpu value can help.

Please:

	http://marc.info/?l=linux-netdev&m=145248145925834&w=2

Thanks.

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[PATCH v2 net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Martin KaFai Lau <kafai@fb.com> - 2016-01-12 09:30 +0100
  Re: [PATCH v2 net-next 0/4] bpf: bpf_htab: Add  BPF_MAP_TYPE_PERCPU_HASH David Miller <davem@davemloft.net> - 2016-01-12 22:50 +0100

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