Re: [dpdk-dev] [PATCH 0/5] vmxnet3 pmd fixes/improvement

["Cao, Waterman" <waterman.cao@intel.com>]

Hi Yong,

	We verified your patch with VMWare ESXi 5.5 and found VMware L2fwd and L3fwd cmd can't run.
    But We use DPDK1.7_rc1 package to validate VMware regression, It works fine.
.
1.[Test Environment]:
 - VMware ESXi 5.5;
 - 2 VM
 - FC20 on Host / FC20-64 on VM
 - Crown Pass server (E2680 v2 ivy bridge )
 - Niantic 82599

2. [Test Topology]:
	Create 2VMs (Fedora 18, 64bit) .
    We pass through one physical port(Niantic 82599) to each VM, and also create one virtual device: vmxnet3 in each VM. 
 	To connect with two VMs, we use one vswitch to connect two vmxnet3 interface.
    Then, PF1 and vmxnet3A are in VM1; PF2 and vmxnet3B are in VM2.
	The traffic flow for l2fwd/l3fwd is as below::
	Ixia -> PF1 -> vmxnet3A -> vswitch -> vmxnet3B -> PF2 -> Ixia. (traffic generator)

3.[ Test Step]:

tar dpdk1.8.rc1 ,compile and run;

L2fwd:  ./build/l2fwd -c f -n 4 -- -p 0x3
L3fwd:  ./build/l3fwd-vf -c 0x6 -n 4 -- -p 0x3 -config "(0,0,1),(1,0,2)"

4.[Error log]:

---VMware L2fwd:---

EAL:   0000:0b:00.0 not managed by UIO driver, skipping
EAL: PCI device 0000:13:00.0 on NUMA socket -1
EAL:   probe driver: 8086:10fb rte_ixgbe_pmd
EAL:   PCI memory mapped at 0x7f678ae6e000
EAL:   PCI memory mapped at 0x7f678af34000
PMD: eth_ixgbe_dev_init(): MAC: 2, PHY: 17, SFP+: 5
PMD: eth_ixgbe_dev_init(): port 0 vendorID=0x8086 deviceID=0x10fb
EAL: PCI device 0000:1b:00.0 on NUMA socket -1
EAL:   probe driver: 15ad:7b0 rte_vmxnet3_pmd
EAL:   PCI memory mapped at 0x7f678af33000
EAL:   PCI memory mapped at 0x7f678af32000
EAL:   PCI memory mapped at 0x7f678af30000
Lcore 0: RX port 0
Lcore 1: RX port 1
Initializing port 0... PMD: ixgbe_dev_rx_queue_setup(): sw_ring=0x7f670b0f5580 hw_ring=0x7f6789fe5280 dma_addr=0x373e5280
PMD: ixgbe_dev_rx_queue_setup(): Rx Burst Bulk Alloc Preconditions are satisfied. Rx Burst Bulk Alloc function will be used on port=0, queue=0.
PMD: ixgbe_dev_rx_queue_setup(): Vector rx enabled, please make sure RX burst size no less than 32.
PMD: ixgbe_dev_tx_queue_setup(): sw_ring=0x7f670b0f3480 hw_ring=0x7f671b820080 dma_addr=0x100020080
PMD: ixgbe_dev_tx_queue_setup(): Using simple tx code path
PMD: ixgbe_dev_tx_queue_setup(): Vector tx enabled.
done: 
Port 0, MAC address: 90:E2:BA:4A:33:78

Initializing port 1... EAL: Error - exiting with code: 1
  Cause: rte_eth_tx_queue_setup:err=-22, port=1

---VMware L3fwd:---

EAL: TSC frequency is ~2793265 KHz
EAL: Master core 1 is ready (tid=9f49a880)
EAL: Core 2 is ready (tid=1d7f2700)
EAL: PCI device 0000:0b:00.0 on NUMA socket -1
EAL:   probe driver: 15ad:7b0 rte_vmxnet3_pmd
EAL:   0000:0b:00.0 not managed by UIO driver, skipping
EAL: PCI device 0000:13:00.0 on NUMA socket -1
EAL:   probe driver: 8086:10fb rte_ixgbe_pmd
EAL:   PCI memory mapped at 0x7f079f3e4000
EAL:   PCI memory mapped at 0x7f079f4aa000
PMD: eth_ixgbe_dev_init(): MAC: 2, PHY: 17, SFP+: 5
PMD: eth_ixgbe_dev_init(): port 0 vendorID=0x8086 deviceID=0x10fb
EAL: PCI device 0000:1b:00.0 on NUMA socket -1
EAL:   probe driver: 15ad:7b0 rte_vmxnet3_pmd
EAL:   PCI memory mapped at 0x7f079f4a9000
EAL:   PCI memory mapped at 0x7f079f4a8000
EAL:   PCI memory mapped at 0x7f079f4a6000
Initializing port 0 ... Creating queues: nb_rxq=1 nb_txq=1...  Address:90:E2:BA:4A:33:78, Allocated mbuf pool on socket 0
LPM: Adding route 0x01010100 / 24 (0)
LPM: Adding route 0x02010100 / 24 (1)
LPM: Adding route 0x03010100 / 24 (2)
LPM: Adding route 0x04010100 / 24 (3)
LPM: Adding route 0x05010100 / 24 (4)
LPM: Adding route 0x06010100 / 24 (5)
LPM: Adding route 0x07010100 / 24 (6)
LPM: Adding route 0x08010100 / 24 (7)
txq=0,0,0 PMD: ixgbe_dev_tx_queue_setup(): sw_ring=0x7f071f6f3c80 hw_ring=0x7f079e5e5280 dma_addr=0x373e5280
PMD: ixgbe_dev_tx_queue_setup(): Using simple tx code path
PMD: ixgbe_dev_tx_queue_setup(): Vector tx enabled.

Initializing port 1 ... Creating queues: nb_rxq=1 nb_txq=1...  Address:00:0C:29:F0:90:41, txq=1,0,0 EAL: Error - exiting with code: 1
  Cause: rte_eth_tx_queue_setup: err=-22, port=1


Can you help to recheck this patch with latest DPDK code?

Regards
Waterman 

-----Original Message-----
>From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Yong Wang
>Sent: Wednesday, October 22, 2014 6:10 AM
>To: Patel, Rashmin N; Stephen Hemminger
>Cc: dev@dpdk.org
>Subject: Re: [dpdk-dev] [PATCH 0/5] vmxnet3 pmd fixes/improvement
>
>Rashmin/Stephen,
>
>Since you have worked on vmxnet3 pmd drivers, I wonder if you can help review this set of patches.  Any other reviews/test verifications are welcome of course.  We have reviewed/tested all patches internally.
>
>Yong
>________________________________________
>From: dev <dev-bounces@dpdk.org> on behalf of Yong Wang <yongwang@vmware.com>
>Sent: Monday, October 13, 2014 2:00 PM
>To: Thomas Monjalon
>Cc: dev@dpdk.org
>Subject: Re: [dpdk-dev] [PATCH 0/5] vmxnet3 pmd fixes/improvement
>
>Only the last one is performance related and it merely tries to give hints to the compiler to hopefully make branch prediction more efficient.  It also moves a constant assignment out of the pkt polling loop.
>
>We did performance evaluation on a Nehalem box with 4cores@2.8GHz x 2 socket:
>On the DPDK-side, it's running some l3 forwarding apps in a VM on ESXi with one core assigned for polling.  The client side is pktgen/dpdk, pumping 64B tcp packets at line rate.  Before the patch, we are seeing ~900K PPS with 65% cpu of a core used for DPDK.  After the patch, we are seeing the same pkt rate with only 45% of a core used.  CPU usage is collected factoring our the idle loop cost.  The packet rate is a result of the mode we used for vmxnet3 (pure emulation mode running default number of hypervisor contexts).  I can add these info in the review request.
>
>Yong
>________________________________________
>From: Thomas Monjalon <thomas.monjalon@6wind.com>
>Sent: Monday, October 13, 2014 1:29 PM
>To: Yong Wang
>Cc: dev@dpdk.org
>Subject: Re: [dpdk-dev] [PATCH 0/5] vmxnet3 pmd fixes/improvement
>
>Hi,
>
>2014-10-12 23:23, Yong Wang:
>> This patch series include various fixes and improvement to the
>> vmxnet3 pmd driver.
>>
>> Yong Wang (5):
>>   vmxnet3: Fix VLAN Rx stripping
>>   vmxnet3: Add VLAN Tx offload
>>   vmxnet3: Fix dev stop/restart bug
>>   vmxnet3: Add rx pkt check offloads
>>   vmxnet3: Some perf improvement on the rx path
>
>Please, could describe what is the performance gain for these patches?
>Benchmark numbers would be appreciated.
>
>Thanks
>--
>Thomas
>