Thanks very much!

-----Original Message-----
From: Keller, Jacob E [mailto:jacob.e.kel...@intel.com] 
Sent: Friday, April 07, 2017 5:09 AM
To: Jonny Shuai4 Zhao; e1000-de...@lists.sf.net
Subject: RE: Some X710 NIC settings, need your help.


> -----Original Message-----
> From: Jonny Shuai4 Zhao [mailto:zhaoshu...@lenovo.com]
> Sent: Thursday, April 06, 2017 12:05 AM
> To: e1000-de...@lists.sf.net
> Subject: [E1000-devel] Some X710 NIC settings, need your help.
> 
> Hello,
> When I use ixgbevf on x520 NIC, I can set "options ixgbevf 
> InterruptThrottleRate=***" in  /etc/modprobe.d/ixgbevf.confixgbevf.conf file.
> Now I use X710 with the newest i40evf version in VM , I want to set 
> the InterruptThrottleRate, what can I do to set it.  I can not find 
> any information about this, so I contact  you for help.  Thanks very much.
> 

InteruptThrottleRate is just the maximum number of interrupts per second. You 
can set this using the equivalent "minimum time between interrupts" setting of 
ethtool known as coalesce values.

ethtool -c <device> shows the current values

ethtool -C <device> rx-usecs <value> tx-usecs <value> sets the number of 
microseconds between Rx and Tx interrupts respectively.

You should be able to do some simple math to convert between the two 
measurements.

You can also enable or disable the drivers adaptive mode for approximating a 
good value automatically.

Thanks,
Jake

> modinfo i40evf
> filename:       /lib/modules/2.6.32-
> 431.el6.x86_64/updates/drivers/net/ethernet/intel/i40evf/i40evf.ko
> version:        1.6.41
> license:        GPL
> description:    Intel(R) 40-10 Gigabit Ethernet Virtual Function Driver
> author:         Intel Corporation, <linux.n...@intel.com>
> srcversion:     348B59968D9F03F1470F65C
> alias:          pci:v00008086d00001571sv*sd*bc*sc*i*
> alias:          pci:v00008086d0000154Csv*sd*bc*sc*i*
> depends:
> vermagic:       2.6.32-431.el6.x86_64 SMP mod_unload modversions
> 
> -------------------------------------------------
> Best Regards
> Jonny Zhao
> Mobile: +86 18101022313
> Email: zhaoshu...@lenovo.com<mailto:zhaoshu...@lenovo.com>
> -------------------------------------------------

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