On 2016/02/25 16:51, Qiu, Michael wrote:
> On 2/24/2016 1:10 PM, Tetsuya Mukawa wrote:
>> On 2016/02/24 11:45, Qiu, Michael wrote:
>>> Hi,  Tetsuya
>>>
>>> When I applied your v6 patch, I could reach 9.5Mpps with 64B packet.
>>>
>>> But when apply v9 only 8.4 Mpps, could you figure out why has
>>> performance drop?
>> Hi Michael,
>>
>> Thanks for checking it.
>> I tried to re-produce it, but I don't see the drop on my environment.
>> (My cpu is Xeon E5-2697-v2, and the performances of v6 and v9 patch are
>> almost 5.9Mpps)
>> Did you use totally same code except for vhost PMD?
> Yes, totally same code and same platform, only difference is versions of
> vhost PMD.
>
> BTW, I have set the frontend mergeable off.

I have checked below cases.
 - Case1: Disable mergeable feature in virtio-net PMD.
 - Case2: Disable mergeable feature in virtio-net PMD and use
'--txqflags=0xf01' option to use simple ring deploying.
Both cases,  I still cannot see the drop.

Anyway, I will send a few patch-series to determine the cause of drop.
So, could you please apply them and check the performance to determine
which cause the drop?

Thanks,
Tetsuya

> Thanks,
> Michael
>> Thanks,
>> Tetsuya
>>
>>> Thanks,
>>> Michael
>>> On 2/9/2016 5:38 PM, Tetsuya Mukawa wrote:
>>>> The patch introduces a new PMD. This PMD is implemented as thin wrapper
>>>> of librte_vhost.
>>>>
>>>>
>>>> PATCH v9 changes:
>>>>  - Fix a null pointer access issue implemented in v8 patch.
>>>>
>>>> PATCH v8 changes:
>>>>  - Manage ether devices list instead of internal structures list.
>>>>  - Remove needless NULL checking.
>>>>  - Replace "pthread_exit" to "return NULL".
>>>>  - Replace rte_panic to RTE_LOG, also add error handling.
>>>>  - Remove duplicated lines.
>>>>  - Remove needless casting.
>>>>  - Follow coding style.
>>>>  - Remove needless parenthesis.
>>>>
>>>> PATCH v7 changes:
>>>>  - Remove needless parenthesis.
>>>>  - Add release note.
>>>>  - Remove needless line wraps.
>>>>  - Add null pointer check in vring_state_changed().
>>>>  - Free queue memory in eth_queue_release().
>>>>  - Fix wrong variable name.
>>>>  - Fix error handling code of eth_dev_vhost_create() and
>>>>    rte_pmd_vhost_devuninit().
>>>>  - Remove needless null checking from rte_pmd_vhost_devinit/devuninit().
>>>>  - Use port id to create mac address.
>>>>  - Add doxygen style comments in "rte_eth_vhost.h".
>>>>  - Fix wrong comment in "mk/rte.app.mk".
>>>>
>>>> PATCH v6 changes:
>>>>  - Remove rte_vhost_driver_pmd_callback_registe().
>>>>  - Support link status interrupt.
>>>>  - Support queue state changed interrupt.
>>>>  - Add rte_eth_vhost_get_queue_event().
>>>>  - Support numa node detection when new device is connected.
>>>>
>>>> PATCH v5 changes:
>>>>  - Rebase on latest master.
>>>>  - Fix RX/TX routine to count RX/TX bytes.
>>>>  - Fix RX/TX routine not to count as error packets if enqueue/dequeue
>>>>    cannot send all packets.
>>>>  - Fix if-condition checking for multiqueues.
>>>>  - Add "static" to pthread variable.
>>>>  - Fix format.
>>>>  - Change default behavior not to receive queueing event from driver.
>>>>  - Split the patch to separate rte_eth_vhost_portid2vdev().
>>>>
>>>> PATCH v4 changes:
>>>>  - Rebase on latest DPDK tree.
>>>>  - Fix cording style.
>>>>  - Fix code not to invoke multiple messaging handling threads.
>>>>  - Fix code to handle vdev parameters correctly.
>>>>  - Remove needless cast.
>>>>  - Remove needless if-condition before rt_free().
>>>>
>>>> PATCH v3 changes:
>>>>  - Rebase on latest matser
>>>>  - Specify correct queue_id in RX/TX function.
>>>>
>>>> PATCH v2 changes:
>>>>  - Remove a below patch that fixes vhost library.
>>>>    The patch was applied as a separate patch.
>>>>    - vhost: fix crash with multiqueue enabled
>>>>  - Fix typos.
>>>>    (Thanks to Thomas, Monjalon)
>>>>  - Rebase on latest tree with above bernard's patches.
>>>>
>>>> PATCH v1 changes:
>>>>  - Support vhost multiple queues.
>>>>  - Rebase on "remove pci driver from vdevs".
>>>>  - Optimize RX/TX functions.
>>>>  - Fix resource leaks.
>>>>  - Fix compile issue.
>>>>  - Add patch to fix vhost library.
>>>>
>>>> RFC PATCH v3 changes:
>>>>  - Optimize performance.
>>>>    In RX/TX functions, change code to access only per core data.
>>>>  - Add below API to allow user to use vhost library APIs for a port managed
>>>>    by vhost PMD. There are a few limitations. See "rte_eth_vhost.h".
>>>>     - rte_eth_vhost_portid2vdev()
>>>>    To support this functionality, vhost library is also changed.
>>>>    Anyway, if users doesn't use vhost PMD, can fully use vhost library 
>>>> APIs.
>>>>  - Add code to support vhost multiple queues.
>>>>    Actually, multiple queues functionality is not enabled so far.
>>>>
>>>> RFC PATCH v2 changes:
>>>>  - Fix issues reported by checkpatch.pl
>>>>    (Thanks to Stephen Hemminger)
>>>>
>>>>
>>>> Tetsuya Mukawa (2):
>>>>   ethdev: Add a new event type to notify a queue state changed event
>>>>   vhost: Add VHOST PMD
>>>>
>>>>  MAINTAINERS                                 |   4 +
>>>>  config/common_linuxapp                      |   6 +
>>>>  doc/guides/nics/index.rst                   |   1 +
>>>>  doc/guides/rel_notes/release_2_3.rst        |   4 +
>>>>  drivers/net/Makefile                        |   4 +
>>>>  drivers/net/vhost/Makefile                  |  62 ++
>>>>  drivers/net/vhost/rte_eth_vhost.c           | 911 
>>>> ++++++++++++++++++++++++++++
>>>>  drivers/net/vhost/rte_eth_vhost.h           | 109 ++++
>>>>  drivers/net/vhost/rte_pmd_vhost_version.map |  11 +
>>>>  lib/librte_ether/rte_ethdev.h               |   2 +
>>>>  mk/rte.app.mk                               |   6 +
>>>>  11 files changed, 1120 insertions(+)
>>>>  create mode 100644 drivers/net/vhost/Makefile
>>>>  create mode 100644 drivers/net/vhost/rte_eth_vhost.c
>>>>  create mode 100644 drivers/net/vhost/rte_eth_vhost.h
>>>>  create mode 100644 drivers/net/vhost/rte_pmd_vhost_version.map
>>>>

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