patches for DPDK stable branches
 help / color / Atom feed
* [dpdk-stable] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
       [not found] <cover.1568216743.git.thierry.herbelot@6wind.com>
@ 2019-09-11 16:00 ` Thierry Herbelot
  2019-09-17  3:16   ` [dpdk-stable] [dpdk-dev] " Zhang, Qi Z
  0 siblings, 1 reply; 4+ messages in thread
From: Thierry Herbelot @ 2019-09-11 16:00 UTC (permalink / raw)
  To: dev; +Cc: Guo Fengtian, Thomas Monjalon, stable, wenzhuo.lu, konstantin.ananyev

From: Guo Fengtian <fengtian.guo@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@dpdk.org
Cc: wenzhuo.lu@intel.com
Cc: konstantin.ananyev@intel.com

Signed-off-by: Guo Fengtian <fengtian.guo@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;              \
 	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


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
  2019-09-11 16:00 ` [dpdk-stable] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset Thierry Herbelot
@ 2019-09-17  3:16   ` " Zhang, Qi Z
  2019-09-30 10:58     ` Ye Xiaolong
  0 siblings, 1 reply; 4+ messages in thread
From: Zhang, Qi Z @ 2019-09-17  3:16 UTC (permalink / raw)
  To: Thierry Herbelot, dev
  Cc: Guo Fengtian, Thomas Monjalon, stable, Lu, Wenzhuo, Ananyev, Konstantin



> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thierry Herbelot
> Sent: Thursday, September 12, 2019 12:01 AM
> To: dev@dpdk.org
> Cc: Guo Fengtian <fengtian.guo@6wind.com>; Thomas Monjalon
> <thomas@monjalon.net>; stable@dpdk.org; Lu, Wenzhuo
> <wenzhuo.lu@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>
> Subject: [dpdk-dev] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
> 
> From: Guo Fengtian <fengtian.guo@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@dpdk.org
> Cc: wenzhuo.lu@intel.com
> Cc: konstantin.ananyev@intel.com
> 
> Signed-off-by: Guo Fengtian <fengtian.guo@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


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
  2019-09-17  3:16   ` [dpdk-stable] [dpdk-dev] " Zhang, Qi Z
@ 2019-09-30 10:58     ` Ye Xiaolong
  2019-09-30 11:06       ` Thierry Herbelot
  0 siblings, 1 reply; 4+ messages in thread
From: Ye Xiaolong @ 2019-09-30 10:58 UTC (permalink / raw)
  To: Zhang, Qi Z
  Cc: Thierry Herbelot, dev, Guo Fengtian, Thomas Monjalon, stable, Lu,
	Wenzhuo, Ananyev, Konstantin

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@dpdk.org] On Behalf Of Thierry Herbelot
>> Sent: Thursday, September 12, 2019 12:01 AM
>> To: dev@dpdk.org
>> Cc: Guo Fengtian <fengtian.guo@6wind.com>; Thomas Monjalon
>> <thomas@monjalon.net>; stable@dpdk.org; Lu, Wenzhuo
>> <wenzhuo.lu@intel.com>; Ananyev, Konstantin
>> <konstantin.ananyev@intel.com>
>> Subject: [dpdk-dev] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
>> 
>> From: Guo Fengtian <fengtian.guo@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@dpdk.org
>> Cc: wenzhuo.lu@intel.com
>> Cc: konstantin.ananyev@intel.com
>> 
>> Signed-off-by: Guo Fengtian <fengtian.guo@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
>

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
  2019-09-30 10:58     ` Ye Xiaolong
@ 2019-09-30 11:06       ` Thierry Herbelot
  0 siblings, 0 replies; 4+ messages in thread
From: Thierry Herbelot @ 2019-09-30 11:06 UTC (permalink / raw)
  To: Ye Xiaolong, Zhang, Qi Z
  Cc: dev, Guo Fengtian, Thomas Monjalon, stable, Lu, Wenzhuo, Ananyev,
	Konstantin

On 9/30/19 12:58 PM, Ye Xiaolong wrote:
> Hi, Thierry & Fengtian
> 
> Any update about this patch according to Qi's comment?

Hello, Xiaolong

I agreee with Qi's comment: this patch solves one issue, but causes 
another problem.

I am completely open to any suggestion about how to retrieve the PF 
status from the VF device.

	Regards

	Thierry

> 
> Thanks,
> Xiaolong
> 
> On 09/17, Zhang, Qi Z wrote:
>>
>>
>>> -----Original Message-----
>>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thierry Herbelot
>>> Sent: Thursday, September 12, 2019 12:01 AM
>>> To: dev@dpdk.org
>>> Cc: Guo Fengtian <fengtian.guo@6wind.com>; Thomas Monjalon
>>> <thomas@monjalon.net>; stable@dpdk.org; Lu, Wenzhuo
>>> <wenzhuo.lu@intel.com>; Ananyev, Konstantin
>>> <konstantin.ananyev@intel.com>
>>> Subject: [dpdk-dev] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset
>>>
>>> From: Guo Fengtian <fengtian.guo@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@dpdk.org
>>> Cc: wenzhuo.lu@intel.com
>>> Cc: konstantin.ananyev@intel.com
>>>
>>> Signed-off-by: Guo Fengtian <fengtian.guo@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
>>


-- 
Thierry Herbelot
6WIND
Senior Software Engineer

Tel: +33 1 39 30 92 61
Fax: +33 1 39 30 92 11
thierry.herbelot@6wind.com
www.6wind.com
Immeuble Central Gare - Bât C 1, place Charles de Gaulle 78180 
Montigny-le-Bretonneux, France

Ce courriel ainsi que toutes les pièces jointes, est uniquement destiné 
à son ou ses destinataires. Il contient des informations confidentielles 
qui sont la propriété de 6WIND. Toute révélation, distribution ou copie 
des informations qu'il contient est strictement interdite. Si vous avez 
reçu ce message par erreur, veuillez immédiatement le signaler à 
l'émetteur et détruire toutes les données reçues

This e-mail message, including any attachments, is for the sole use of 
the intended recipient(s) and contains information that is confidential 
and proprietary to 6WIND. All unauthorized review, use, disclosure or 
distribution is prohibited. If you are not the intended recipient, 
please contact the sender by reply e-mail and destroy all copies of the 
original message.

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, back to index

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <cover.1568216743.git.thierry.herbelot@6wind.com>
2019-09-11 16:00 ` [dpdk-stable] [PATCH 1/1] net/ixgbevf: fix stats update after a PF reset Thierry Herbelot
2019-09-17  3:16   ` [dpdk-stable] [dpdk-dev] " Zhang, Qi Z
2019-09-30 10:58     ` Ye Xiaolong
2019-09-30 11:06       ` Thierry Herbelot

patches for DPDK stable branches

Archives are clonable:
	git clone --mirror http://inbox.dpdk.org/stable/0 stable/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 stable stable/ http://inbox.dpdk.org/stable \
		stable@dpdk.org
	public-inbox-index stable


Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.stable


AGPL code for this site: git clone https://public-inbox.org/ public-inbox