From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Ira Weiny <weiny2-i2BcT+NCU+M@public.gmane.org>
Cc: Roland Dreier <roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Or Gerlitz <or.gerlitz-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 4/5] ib/core: add support for extended performance counters in sysfs
Date: Tue, 1 Nov 2011 16:11:35 -0600 [thread overview]
Message-ID: <20111101221135.GP26974@obsidianresearch.com> (raw)
In-Reply-To: <20111101150358.17d232ee.weiny2-i2BcT+NCU+M@public.gmane.org>
On Tue, Nov 01, 2011 at 03:03:58PM -0700, Ira Weiny wrote:
> > And again, this is a useless interface in IB.
>
> Why do you mean by this?
A counter that is randomly reset by an external IB performance manager
is not useful for collecting local statistical information.
A counter that saturates and cannot be reset locally is not useful for
any automatic process.
Why have a sysfs counter at all when you can just ask the PMA and get
exactly the same data?
I can't make a SNMP MIB from this counter. I can't make graphs from
this counter. I can't do anything with it except show it to the user
and hope they understand when it was last reset, or understand what
to do when it is saturated.
Jason
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2011-11-01 22:11 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-10 8:51 [PATCH for-3.2] IBoE fixes Or Gerlitz
[not found] ` <alpine.LRH.2.00.1110101047420.10901-VYr5/9ddeaGSIdy2EShu12Xnswh1EIUO@public.gmane.org>
2011-10-10 8:53 ` [PATCH 1/5] ib/mlx4: enable 4K mtu for IBoE Or Gerlitz
2011-10-10 8:54 ` [PATCH 2/5] ib/mlx4: remove setting of vlan in IBoE WQEs control segment Or Gerlitz
2011-10-10 8:55 ` [PATCH 3/5] net/mlx4_core: remove module param controlling the vlan table size Or Gerlitz
[not found] ` <alpine.LRH.2.00.1110101055050.11243-VYr5/9ddeaGSIdy2EShu12Xnswh1EIUO@public.gmane.org>
2011-10-10 17:00 ` Roland Dreier
[not found] ` <CAG4TOxNaQicA6ExuNsw8V95mJPD+AQX5Wrfg+rCoBxdr2E+2ww-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-10-11 7:24 ` Or Gerlitz
[not found] ` <4E93EF38.5040707-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2011-10-11 17:28 ` Roland Dreier
[not found] ` <CAL1RGDVk2EOmgWU_iZQWQqKJFPNYN4o_5_14Qbr_6wUzTJ1bOg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-10-11 19:18 ` Or Gerlitz
[not found] ` <CAJZOPZJnzUm2M1zm1564TUwKCN3r=y3g-4pwTL4bJPDo2V4s9w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-10-11 19:22 ` Roland Dreier
2011-10-16 8:32 ` Or Gerlitz
2011-10-16 8:26 ` [PATCH V1 3/5] net/mlx4_core: deprecate " Or Gerlitz
2011-10-10 8:56 ` [PATCH 4/5] ib/core: add support for extended performance counters in sysfs Or Gerlitz
[not found] ` <alpine.LRH.2.00.1110101055570.11243-VYr5/9ddeaGSIdy2EShu12Xnswh1EIUO@public.gmane.org>
2011-10-31 19:38 ` Roland Dreier
[not found] ` <CAL1RGDXdkiZNtAsnqDtgbCJGLXLFvk8s-YA5mR189kmg6FkabQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-01 6:40 ` Or Gerlitz
[not found] ` <CAJZOPZ+K3u+u5XutGfBhKh3DaBpNRKV_bw67CLK6jy3060OHqA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-01 16:22 ` Jason Gunthorpe
[not found] ` <20111101162218.GA10710-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-11-01 17:23 ` Or Gerlitz
[not found] ` <CAJZOPZLXZL=vEDdXE3rE5Jzw840SrdY=73M7QgKSNzOysRE6MQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-01 17:36 ` Jason Gunthorpe
[not found] ` <20111101173625.GH26974-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-11-01 18:14 ` Or Gerlitz
[not found] ` <CAJZOPZJCY5ehTGw8htsxw0dJgMXJJAS-=LGJde9ddcMsmhqvMg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-01 18:37 ` Jason Gunthorpe
[not found] ` <20111101183730.GI26974-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-11-01 21:42 ` Roland Dreier
2011-11-01 21:44 ` Or Gerlitz
2011-11-01 21:52 ` Jason Gunthorpe
[not found] ` <20111101215200.GN26974-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-11-01 22:03 ` Ira Weiny
[not found] ` <20111101150358.17d232ee.weiny2-i2BcT+NCU+M@public.gmane.org>
2011-11-01 22:11 ` Jason Gunthorpe [this message]
[not found] ` <20111101221135.GP26974-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-11-01 22:19 ` Ira Weiny
2011-11-01 22:34 ` Or Gerlitz
[not found] ` <CAJZOPZJh2T5nCsdU9B0anUnoB=SpRD2_yBLT620zEi0Kr12MFg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-01 22:46 ` Ira Weiny
[not found] ` <20111101154627.f3c847dd.weiny2-i2BcT+NCU+M@public.gmane.org>
2011-11-02 7:38 ` Or Gerlitz
2011-11-02 17:16 ` Or Gerlitz
[not found] ` <4EB17AF9.3000608-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2011-11-08 0:54 ` Roland Dreier
[not found] ` <CAG4TOxOYAnuB8oKkJgr9_6EpF+YR-h9WNak+gSWwpV0Nz-LeZg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-08 1:09 ` Jason Gunthorpe
[not found] ` <20111108010952.GC4934-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-11-08 16:06 ` Ira Weiny
[not found] ` <20111108080606.7c5dd62c.weiny2-i2BcT+NCU+M@public.gmane.org>
2011-12-20 11:49 ` Or Gerlitz
2011-12-20 11:49 ` Or Gerlitz
2011-12-20 12:03 ` Or Gerlitz
[not found] ` <4EF07993.2090900-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2011-12-20 17:46 ` Jason Gunthorpe
[not found] ` <20111220174639.GE25774-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-12-20 19:40 ` Or Gerlitz
[not found] ` <CAJZOPZ+rBKck50kmyhLZ3VNLNmoS_K6cA3Pj3L6XQjcBQo6DjA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-12-20 19:50 ` Jason Gunthorpe
[not found] ` <20111220195014.GH25774-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-12-20 19:56 ` Or Gerlitz
2012-01-04 19:29 ` Or Gerlitz
2011-12-22 17:09 ` Or Gerlitz
2011-11-01 21:46 ` Or Gerlitz
[not found] ` <CAJZOPZ+zmwTdHva5C7k0QhBmEzxSGTa1Ajszz3eSH=WpP3A4fg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-01 21:58 ` Jason Gunthorpe
[not found] ` <20111101215843.GO26974-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2011-11-02 8:27 ` Or Gerlitz
2011-11-01 21:49 ` Roland Dreier
[not found] ` <CAG4TOxM4n3=51-3UqYF=iRS25OdRjTXoKDD6u1DukgRrwvTW1g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-01 22:32 ` Or Gerlitz
2011-11-01 22:49 ` Hefty, Sean
2011-10-10 8:57 ` [PATCH 5/5] ib/mlx4: added support for extended PMA counters under IBoE Or Gerlitz
2011-10-26 7:04 ` [PATCH for-3.2] IBoE fixes Or Gerlitz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20111101221135.GP26974@obsidianresearch.com \
--to=jgunthorpe-epgobjl8dl3ta4ec/59zmfatqe2ktcn/@public.gmane.org \
--cc=linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org \
--cc=or.gerlitz-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=weiny2-i2BcT+NCU+M@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.