The receiver is zos. Anybody here know how to increase the buffers in zos.
Ron Sent from my iPhone On Jul 25, 2013, at 1:14 PM, "Ursula Braun" <ubr...@linux.vnet.ibm.com> wrote: > Ron, > > Carsten's first explanation is correct. If you see tx_errors on a > HiperSockets interface, it usually means transmission of a packet fails > because the receiver has currently no free receive buffer. You should > verify first if the receiver has configured the maximum of 128 buffers > (sysfs attribute buffer_count) for his HiperSockets device. 128 is > nowadays the default, but older qeth driver versions run with a default > of 16. If you see the tx_errors even though your receiver runs already > with the maximum of 128 buffers, you either have to live with the > autotuning mechanisms of tcp or you take actions to slow down the sender > or to accelerate the receiver. > > As Alan suggested we can document this in the Device Driver book. The > other option would be to change the current behavior of the qeth driver > and increase probably both the tx_dropped and the tx_error counter. > > It is definitely not a problem to report to SuSe folks. > > Kind regards, Ursula Braun, Linux on System z development, IBM Germany > > On Thu, 2013-07-25 at 13:18 +0000, Ron Foster wrote: >> Carsten, >> >> Do you know where I would start looking for causes of the transmit errors on >> Hipersockets? >> >> The error is occurring on SLES11 SP2 systems. We are not having it on our >> SLES10 SP4 systems. >> >> Do I need to open a problem with the SuSe folks? >> >> Thanks, >> >> Ron Foster >> >> Baldor Electric Company >> >> 5711 R S Boreham Jr Street >> >> Fort Smith, AR 72901 >> >> Phone:479-648-5865 >> >> Fax:479-646-5440 >> >> Email: ron.fos...@baldor.abb.com >> >> IM Address:rfos...@baldor.com >> >> www.baldor.com >> >> >> >> ________________________________________ >> From: Linux on 390 Port [LINUX-390@VM.MARIST.EDU] on behalf of Carsten Otte >> [co...@de.ibm.com] >> Sent: Thursday, July 25, 2013 7:53 AM >> To: LINUX-390@VM.MARIST.EDU >> Subject: Re: TX-Errs on hipersocket interface. >> >> Alan wrote: >>> Carsten, this is information that really needs to be in the Device Driver >>> book, as it differs from the traditional interpretation of TX/RX counters. >> Ah, you're right - that would be accouned as dropped, not TX error. Forget >> about my >> reply then, time to look at other causes for that TX error. Sorry for the >> noise. >> >> with kind regards >> Carsten Otte >> System z firmware development / Boeblingen lab >> --- >> Every revolution was first a thought in one man's mind; >> and when the same thought occurs to another man, it is the key to that era. >> >> - Ralph Waldo Emerson, Essays: First Series, 1841 >> >> ---------------------------------------------------------------------- >> For LINUX-390 subscribe / signoff / archive access instructions, >> send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or >> visit >> http://www.marist.edu/htbin/wlvindex?LINUX-390 >> ---------------------------------------------------------------------- >> For more information on Linux on System z, visit >> http://wiki.linuxvm.org/ >> ---------------------------------------------------------------------- >> For LINUX-390 subscribe / signoff / archive access instructions, >> send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or >> visit >> http://www.marist.edu/htbin/wlvindex?LINUX-390 >> ---------------------------------------------------------------------- >> For more information on Linux on System z, visit >> http://wiki.linuxvm.org/ > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
