[dpdk-dev] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
Ye Xiaolong
xiaolong.ye at intel.com
Mon Sep 30 12:58:45 CEST 2019
Hi, Thierry & Fengtian
Any update about this patch according to Qi's comment?
Thanks,
Xiaolong
On 09/17, Zhang, Qi Z wrote:
>
>
>> -----Original Message-----
>> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Thierry Herbelot
>> Sent: Thursday, September 12, 2019 12:01 AM
>> To: dev at dpdk.org
>> Cc: Guo Fengtian <fengtian.guo at 6wind.com>; Thomas Monjalon
>> <thomas at monjalon.net>; stable at dpdk.org; Lu, Wenzhuo
>> <wenzhuo.lu at intel.com>; Ananyev, Konstantin
>> <konstantin.ananyev at intel.com>
>> Subject: [dpdk-dev] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
>>
>> From: Guo Fengtian <fengtian.guo at 6wind.com>
>>
>> When PF is set down, in VF, the value of stats register is zero.
>> So only increase stats when it's non zero.
>>
>> Fixes: af75078fece3 ('first public release')
>> Cc: stable at dpdk.org
>> Cc: wenzhuo.lu at intel.com
>> Cc: konstantin.ananyev at intel.com
>>
>> Signed-off-by: Guo Fengtian <fengtian.guo at 6wind.com>
>> ---
>> drivers/net/ixgbe/ixgbe_ethdev.c | 6 ++++--
>> 1 file changed, 4 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
>> b/drivers/net/ixgbe/ixgbe_ethdev.c
>> index 7eb3d0567b58..27c540f60563 100644
>> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
>> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
>> @@ -385,7 +385,8 @@ static void ixgbe_l2_tunnel_conf(struct rte_eth_dev
>> *dev);
>> #define UPDATE_VF_STAT(reg, last, cur) \
>> { \
>> uint32_t latest = IXGBE_READ_REG(hw, reg); \
>> - cur += (latest - last) & UINT_MAX; \
>> + if (latest) \
>> + cur += (latest - last) & UINT_MAX; \
>
>There is still a chance that PF is up but the latest reg read returns 0, since it's a cyclic counter, is any way to check the PF status directly?
>
>> last = latest; \
>> }
>>
>> @@ -394,7 +395,8 @@ static void ixgbe_l2_tunnel_conf(struct rte_eth_dev
>> *dev);
>> u64 new_lsb = IXGBE_READ_REG(hw, lsb); \
>> u64 new_msb = IXGBE_READ_REG(hw, msb); \
>> u64 latest = ((new_msb << 32) | new_lsb); \
>> - cur += (0x1000000000LL + latest - last) & 0xFFFFFFFFFLL; \
>> + if (latest) \
>> + cur += (0x1000000000LL + latest - last) & 0xFFFFFFFFFLL;\
>> last = latest; \
>> }
>>
>> --
>> 2.20.1
>
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