Hi, jingjing > -----Original Message----- > From: Wu, Jingjing > Sent: Saturday, September 9, 2017 11:16 AM > To: Zhao1, Wei <wei.zh...@intel.com>; Yigit, Ferruh > <ferruh.yi...@intel.com>; dev@dpdk.org > Subject: RE: [dpdk-dev] [PATCH v2 1/2] net/i40e: fix clear xstats bug in vf > port > > > > > -----Original Message----- > > From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Zhao1, Wei > > Sent: Friday, September 1, 2017 10:30 AM > > To: Yigit, Ferruh <ferruh.yi...@intel.com>; dev@dpdk.org > > Subject: Re: [dpdk-dev] [PATCH v2 1/2] net/i40e: fix clear xstats bug > > in vf port > > > > Hi, Ferruh > > > > > -----Original Message----- > > > From: Yigit, Ferruh > > > Sent: Friday, September 1, 2017 12:54 AM > > > To: Zhao1, Wei <wei.zh...@intel.com>; dev@dpdk.org > > > Subject: Re: [dpdk-dev] [PATCH v2 1/2] net/i40e: fix clear xstats > > > bug in vf port > > > > > > On 8/29/2017 3:28 AM, Wei Zhao wrote: > > > > There is a bug in vf clear xstats command, it do not record the > > > > statics data in offset struct member.So, vf need to keep record of > > > > xstats data from pf and update the statics according to offset. > > > > > > > > Fixes: da61cd0849766 ("i40evf: add extended stats") > > > > > > > > Signed-off-by: Wei Zhao <wei.zh...@intel.com> > > > > > > > > --- > > > > > > > > Changes in v2: > > > > > > > > fix patch log check warning. > > > > --- > > > > app/test-pmd/config.c | 6 ++-- > > > > drivers/net/i40e/i40e_ethdev_vf.c | 64 > > > > ++++++++++++++++++++++++++++++++++++++- > > > > 2 files changed, 67 insertions(+), 3 deletions(-) > > > > > > > > diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c index > > > > 3ae3e1c..14131d6 100644 > > > > --- a/app/test-pmd/config.c > > > > +++ b/app/test-pmd/config.c > > > > @@ -203,8 +203,10 @@ nic_stats_display(portid_t port_id) > > > > if (diff_cycles > 0) > > > > diff_cycles = prev_cycles[port_id] - diff_cycles; > > > > > > > > - diff_pkts_rx = stats.ipackets - prev_pkts_rx[port_id]; > > > > - diff_pkts_tx = stats.opackets - prev_pkts_tx[port_id]; > > > > + diff_pkts_rx = (stats.ipackets > prev_pkts_rx[port_id]) ? > > > > + (stats.ipackets - prev_pkts_rx[port_id]) : 0; > > > > + diff_pkts_tx = (stats.opackets > prev_pkts_tx[port_id]) ? > > > > + (stats.opackets - prev_pkts_tx[port_id]) : 0; > > > > > > I guess this testpmd update is not directly related to this patch, > > > but to protect testpmd against value overflow? Can this be another patch? > > > > Nonono, this code change is directly related to this patch, if we do > > not do this code change, the diff_pkts_rx and diff_pkts_tx statistic > > data will be wrong when the first time after clear xstats command. > > > Yes, the fix will make the error happen, but this is the fix of the clear > xstats > issue. > You can create a separate patch for it just to make clearer.
OK, I will create a separate patch for it later. > > <......> > > This bug only appear after use CLI "clear port xstats 0". So it is not > > easy to detect this bug. > > After using this fix patch ,the big user who report this issue has > > feed back it work well now. > > The root cause is not so complicated, when the pf which admin this vf > > is in kernel state, DPDK can not Give pf the info to clear and update > > offset command, so vf can only keep record the offset data in DPDK VF > > port locally. > > > That was because i40evf PMD doesn't support the ops "stats_reset", but > "xstats_reset" > Is implemented when xstats are introduced in i40vf PMD. > I think you also need to add the ops "stats_reset", testing can cover this > basic > case then. Yes , I have create a new patch for add support of reset stats in vf port. http://dpdk.org/dev/patchwork/patch/28046/ > > Thanks > Jingjing
