From: Bart Van Assche <bvanassche-HInyCGIudOg@public.gmane.org>
To: David Dillow <dave-i1Mk8JYDVaaSihdK6806/g@public.gmane.org>
Cc: Jason Gunthorpe
<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>,
Roland Dreier <roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Vu Pham <vuhuong-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
Sebastian Riemer
<sebastian.riemer-EIkl63zCoXaH+58JC4qpiA@public.gmane.org>,
linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH v2 14/15] IB/srp: Make transport layer retry count configurable
Date: Mon, 01 Jul 2013 13:44:23 +0200 [thread overview]
Message-ID: <51D16B97.904@acm.org> (raw)
In-Reply-To: <1372677965.12468.57.camel-a7a0dvSY7KqLUyTwlgNVppKKF0rrzTr+@public.gmane.org>
On 07/01/13 13:26, David Dillow wrote:
> On Mon, 2013-07-01 at 10:18 +0200, Bart Van Assche wrote:
>> The InfiniBand specification mentions the following about differential
>> receiver inputs (C6-11.2.1): "A BER of 10^-12 shall be achieved when
>> connected to the worst case transmitter through any compliant channel".
>
> There are a _lot_ of networks out there with non-compliant channels,
> then. The spec says one thing, but the reality matters. Also, perhaps my
> math is wrong, but that seems to be one error every 18 seconds or so at
> FDR speeds?
If data is transferred at line rate on an FDR network, I agree that
about one error is expected about every 18 seconds.
Sorry but it's not clear to me what makes you think that there are a lot
of IB networks with non-compliant channels ?
Bart.
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next prev parent reply other threads:[~2013-07-01 11:44 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-28 12:45 [PATCH v2 0/15] IB SRP initiator patches for kernel 3.11 Bart Van Assche
[not found] ` <51CD856A.3010102-HInyCGIudOg@public.gmane.org>
2013-06-28 12:46 ` [PATCH v2 01/15] IB/srp: Fix remove_one crash due to resource exhaustion Bart Van Assche
2013-06-28 12:48 ` [PATCH v2 02/15] IB/srp: Fix race between srp_queuecommand() and srp_claim_req() Bart Van Assche
[not found] ` <51CD8604.5010801-HInyCGIudOg@public.gmane.org>
2013-06-28 14:42 ` Sebastian Riemer
[not found] ` <51CDA0CD.6060504-EIkl63zCoXaH+58JC4qpiA@public.gmane.org>
2013-06-28 14:51 ` Bart Van Assche
[not found] ` <51CDA2E5.2010704-HInyCGIudOg@public.gmane.org>
2013-06-28 15:08 ` Sebastian Riemer
2013-06-30 19:59 ` David Dillow
[not found] ` <1372622347.12468.9.camel-a7a0dvSY7KqLUyTwlgNVppKKF0rrzTr+@public.gmane.org>
2013-07-01 7:10 ` Bart Van Assche
2013-06-28 12:49 ` [PATCH v2 03/15] IB/srp: Avoid that srp_reset_host() is skipped after a TL error Bart Van Assche
[not found] ` <51CD8644.5080600-HInyCGIudOg@public.gmane.org>
2013-06-30 20:00 ` David Dillow
2013-06-28 12:49 ` [PATCH v2 04/15] IB/srp: Fail I/O fast if target offline Bart Van Assche
[not found] ` <51CD8676.6080205-HInyCGIudOg@public.gmane.org>
2013-06-30 20:02 ` David Dillow
2013-07-01 9:07 ` Sebastian Riemer
[not found] ` <51D146EE.6010209-EIkl63zCoXaH+58JC4qpiA@public.gmane.org>
2013-07-01 11:33 ` Bart Van Assche
[not found] ` <51D16918.60600-HInyCGIudOg@public.gmane.org>
2013-07-01 11:53 ` Sebastian Riemer
2013-07-01 9:25 ` Sebastian Riemer
[not found] ` <51D14AF1.4000803-EIkl63zCoXaH+58JC4qpiA@public.gmane.org>
2013-07-01 11:38 ` Bart Van Assche
[not found] ` <51D16A39.4050709-HInyCGIudOg@public.gmane.org>
2013-07-01 12:31 ` Sebastian Riemer
[not found] ` <51D176B5.90609-EIkl63zCoXaH+58JC4qpiA@public.gmane.org>
2013-07-01 12:57 ` Bart Van Assche
2013-07-02 8:30 ` Sebastian Riemer
2013-06-28 12:50 ` [PATCH v2 05/15] IB/srp: Skip host settle delay Bart Van Assche
2013-06-28 12:51 ` [PATCH v2 06/15] IB/srp: Maintain a single connection per I_T nexus Bart Van Assche
[not found] ` <51CD86CE.8080804-HInyCGIudOg@public.gmane.org>
2013-06-30 20:10 ` David Dillow
2013-06-28 12:52 ` [PATCH v2 07/15] IB/srp: Keep rport as long as the IB transport layer Bart Van Assche
2013-06-30 21:06 ` David Dillow
2013-06-28 12:54 ` [PATCH v2 09/15] IB/srp: Add srp_terminate_io() Bart Van Assche
[not found] ` <51CD877E.80606-HInyCGIudOg@public.gmane.org>
2013-06-30 21:10 ` David Dillow
2013-06-28 12:55 ` [PATCH v2 10/15] IB/srp: Use SRP transport layer error recovery Bart Van Assche
[not found] ` <51CD87A9.2090702-HInyCGIudOg@public.gmane.org>
2013-06-30 21:20 ` David Dillow
2013-06-28 12:55 ` [PATCH v2 11/15] IB/srp: Start timers if a transport layer error occurs Bart Van Assche
[not found] ` <51CD87D7.3050300-HInyCGIudOg@public.gmane.org>
2013-06-30 21:21 ` David Dillow
2013-06-28 12:57 ` [PATCH v2 13/15] IB/srp: Make HCA completion vector configurable Bart Van Assche
[not found] ` <51CD8846.4070400-HInyCGIudOg@public.gmane.org>
2013-06-30 21:26 ` David Dillow
2013-06-28 12:58 ` [PATCH v2 14/15] IB/srp: Make transport layer retry count configurable Bart Van Assche
[not found] ` <51CD8876.9020307-HInyCGIudOg@public.gmane.org>
2013-06-30 21:48 ` David Dillow
[not found] ` <1372628891.12468.52.camel-a7a0dvSY7KqLUyTwlgNVppKKF0rrzTr+@public.gmane.org>
2013-07-01 8:18 ` Bart Van Assche
[not found] ` <51D13B52.5060803-HInyCGIudOg@public.gmane.org>
2013-07-01 11:26 ` David Dillow
[not found] ` <1372677965.12468.57.camel-a7a0dvSY7KqLUyTwlgNVppKKF0rrzTr+@public.gmane.org>
2013-07-01 11:44 ` Bart Van Assche [this message]
2013-07-02 19:18 ` Jason Gunthorpe
[not found] ` <20130702191842.GD14625-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-07-03 14:26 ` David Dillow
2013-06-28 12:59 ` [PATCH v2 15/15] IB/srp: Bump driver version and release date Bart Van Assche
2013-06-28 12:53 ` [PATCH v2 08/15] scsi_transport_srp: Add transport layer error handling Bart Van Assche
2013-06-30 21:05 ` David Dillow
[not found] ` <1372626334.12468.34.camel-a7a0dvSY7KqLUyTwlgNVppKKF0rrzTr+@public.gmane.org>
2013-07-01 7:01 ` Bart Van Assche
[not found] ` <51D12941.3050105-HInyCGIudOg@public.gmane.org>
2013-07-01 11:19 ` David Dillow
2013-06-28 12:56 ` [PATCH v2 12/15] IB/srp: Fail SCSI commands silently Bart Van Assche
[not found] ` <51CD8812.20107-HInyCGIudOg@public.gmane.org>
2013-06-30 21:25 ` David Dillow
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