From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Zhang Subject: Re: Recurring trace from tcp_fragment() Date: Thu, 04 Jun 2015 09:35:04 -0700 Message-ID: <55707E38.4090506@fastly.com> References: <5E30A40E-EC6C-4D37-AB49-04BF40EEFBFC@fastly.com> <904FADEB-C1EB-4384-BA47-0EB0273AFB71@fastly.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------010907050705060102090401" Cc: Netdev , Yuchung Cheng , Eric Dumazet To: Neal Cardwell Return-path: Received: from mail-qg0-f50.google.com ([209.85.192.50]:35040 "EHLO mail-qg0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752245AbbFDQfH (ORCPT ); Thu, 4 Jun 2015 12:35:07 -0400 Received: by qgh73 with SMTP id 73so5159910qgh.2 for ; Thu, 04 Jun 2015 09:35:07 -0700 (PDT) In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: This is a multi-part message in MIME format. --------------010907050705060102090401 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi Neal, Unfortunately with the patch we still see the same stack trace. Attached is the TcpExtTCPSACKReneging with the patch, captured with 60 seconds interval. Its value is incremented at an similar speed as before, about 30/minute. If you want to collect any other data, please feel free to let me know. Thanks, Grant On 5/30/15 4:08 PM, Neal Cardwell wrote: > On Sat, May 30, 2015 at 2:52 PM, Grant Zhang wrote: >> Thank you Neal. Most likely I will test the patch on Monday and report >> back the result. >> >> As for the TcpExtTCPSACKReneging counter, attached is the captured >> counter value on a 1-second interval for 10 minutes. > > OK, great. Those TcpExtTCPSACKReneging values look consistent with the > theory underlying the patch, so that's a good sign. > > Thanks! > > neal > --------------010907050705060102090401 Content-Type: text/plain; charset=UTF-8; name="reneg_patch.txt" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="reneg_patch.txt" VGNwRXh0VENQU0FDS1JlbmVnaW5nICAgICAgICAgICA0ODkgICAgICAgICAgICAgICAgMC4w ClRjcEV4dFRDUFNBQ0tSZW5lZ2luZyAgICAgICAgICAgNTA0ICAgICAgICAgICAgICAgIDAu MApUY3BFeHRUQ1BTQUNLUmVuZWdpbmcgICAgICAgICAgIDUyMyAgICAgICAgICAgICAgICAw LjAKVGNwRXh0VENQU0FDS1JlbmVnaW5nICAgICAgICAgICA1NDQgICAgICAgICAgICAgICAg MC4wClRjcEV4dFRDUFNBQ0tSZW5lZ2luZyAgICAgICAgICAgNTY1ICAgICAgICAgICAgICAg IDAuMApUY3BFeHRUQ1BTQUNLUmVuZWdpbmcgICAgICAgICAgIDU3MyAgICAgICAgICAgICAg ICAwLjAKVGNwRXh0VENQU0FDS1JlbmVnaW5nICAgICAgICAgICA1ODkgICAgICAgICAgICAg ICAgMC4wClRjcEV4dFRDUFNBQ0tSZW5lZ2luZyAgICAgICAgICAgNjIxICAgICAgICAgICAg ICAgIDAuMApUY3BFeHRUQ1BTQUNLUmVuZWdpbmcgICAgICAgICAgIDYzMiAgICAgICAgICAg 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