Hi Alfredo: Now I understand the limitation. I got a false impression that the intel chip supports hardware timestamp and it does it, it supports hardware time sync. I have to accept microsecond resolution as is.
Much Thanks Morgan Yang On Thu, Sep 25, 2014 at 3:40 PM, Morgan Yang <[email protected]> wrote: > Hi Alfredo: > > I came across this PF_RING blog that seems to be close to what i'm looking > for. But the tar ball is no longer available. It will be nice to have the > 12 bytes of timestamp tagged on the incoming traffic, I just want to figure > out how to do it... > > > http://www.ntop.org/pf_ring/remote-nsec-timestamps-using-pf_ring-and-cpacket-devices/ > > Much Thanks > Morgan Yang > > On Thu, Sep 25, 2014 at 2:36 PM, Morgan Yang <[email protected]> > wrote: > >> Hi Alfredo: >> >> I just want to describe my use case. I have a machine with 16 Intel 10G >> interfaces, basically serving as a pcap recorder. I can record alot of >> packets but I'm interested in having better timestamp resolution on the >> packets, right now they are at millisecond and micro-second level. I was >> wondering if hardware timestamping can be used for this scenario. The only >> information I have thus far in addition to linux ptp (which i'm not sure >> fits my use case) is this white paper about high resolution packet capture. >> http://icai.ektf.hu/pdf/ICAI2010-vol2-pp237-245.pdf >> >> Much Thanks >> Morgan Yang >> >> On Thu, Sep 25, 2014 at 10:59 AM, Morgan Yang <[email protected]> >> wrote: >> >>> Hi Alfredo: >>> >>> I have the Silicom Dual NIC without the FPGA. I'm curious as intel 82599 >>> MAC time stamping is listed on linux ptp's site. >>> http://linuxptp.sourceforge.net/ >>> >>> I am, however, not clear if an explicit 1588 source is required for >>> Linux PTP and Intel's hardware timestamp to operate. >>> >>> Much Thanks >>> Morgan Yang >>> >>> On Thu, Sep 25, 2014 at 10:08 AM, Alfredo Cardigliano < >>> [email protected]> wrote: >>> >>>> Hi Morgan >>>> hw timestamps on 10g intel card are supported with Silicom adapters >>>> with FPGA onboard. >>>> >>>> Alfredo >>>> >>>> On 25 Sep 2014, at 00:24, Morgan Yang <[email protected]> >>>> wrote: >>>> >>>> > Hi: >>>> > >>>> > It seems standard ixgbe driver supports hardware timestamping, is >>>> this something that has to be enabled or is supported out of the box? I'm >>>> running ixgbe 3.15.1-k packaged by Ubuntu. >>>> > >>>> > Much Thanks >>>> > Morgan Yang >>>> > _______________________________________________ >>>> > Ntop-misc mailing list >>>> > [email protected] >>>> > http://listgateway.unipi.it/mailman/listinfo/ntop-misc >>>> >>>> _______________________________________________ >>>> Ntop-misc mailing list >>>> [email protected] >>>> http://listgateway.unipi.it/mailman/listinfo/ntop-misc >>>> >>> >>> >> >
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