DPDK-dev Archive on lore.kernel.org
 help / color / Atom feed
From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: "Yu, Jin" <jin.yu@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "Liu, Changpeng" <changpeng.liu@intel.com>,
	"Bie, Tiwei" <tiwei.bie@intel.com>,
	"Wang, Zhihong" <zhihong.wang@intel.com>,
	Lin Li <lilin24@baidu.com>, Xun Ni <nixun@baidu.com>,
	Yu Zhang <zhangyu31@baidu.com>
Subject: Re: [dpdk-dev] [PATCH v6 05/10] vhost: checkout and cleanup the resubmit inflight information
Date: Wed, 11 Sep 2019 10:43:31 +0200
Message-ID: <32ea439d-cc3d-9dc1-7a01-b074993c26c6@redhat.com> (raw)
In-Reply-To: <B9FBC361811A3D4DBB02350807E29F7B0B957A83@SHSMSX101.ccr.corp.intel.com>



On 9/11/19 4:50 AM, Yu, Jin wrote:
>> -----Original Message-----
>> From: Maxime Coquelin [mailto:maxime.coquelin@redhat.com]
>> Sent: Monday, September 9, 2019 6:21 PM
>> To: Yu, Jin <jin.yu@intel.com>; dev@dpdk.org
>> Cc: Liu, Changpeng <changpeng.liu@intel.com>; Bie, Tiwei
>> <tiwei.bie@intel.com>; Wang, Zhihong <zhihong.wang@intel.com>; Lin Li
>> <lilin24@baidu.com>; Xun Ni <nixun@baidu.com>; Yu Zhang
>> <zhangyu31@baidu.com>
>> Subject: Re: [PATCH v6 05/10] vhost: checkout and cleanup the resubmit inflight
>> information
>>
>>
>>
>> On 8/29/19 4:12 PM, JinYu wrote:
>>> This patch shows how to checkout the inflight ring and construct the
>>> resubmit information also include destroying resubmit info.
>>>
>>> Signed-off-by: Lin Li <lilin24@baidu.com>
>>> Signed-off-by: Xun Ni <nixun@baidu.com>
>>> Signed-off-by: Yu Zhang <zhangyu31@baidu.com>
>>> Signed-off-by: Jin Yu <jin.yu@intel.com>
>>> ---
>>>  lib/librte_vhost/rte_vhost.h  |  19 ++++
>>>  lib/librte_vhost/vhost.c      |  29 ++++-
>>>  lib/librte_vhost/vhost.h      |   9 ++
>>>  lib/librte_vhost/vhost_user.c | 197
>>> ++++++++++++++++++++++++++++++++++
>>>  4 files changed, 253 insertions(+), 1 deletion(-)
>>>
>> ...
>>> +static int
>>> +vhost_check_queue_inflights_packed(struct virtio_net *dev,
>>> +						 struct vhost_virtqueue *vq)
>>> +{
>>> +	uint16_t i = 0;
>>> +	uint16_t resubmit_num = 0, old_used_idx, num;
>>> +	struct rte_vhost_resubmit_info *resubmit = NULL;
>>> +	struct inflight_info_packed *inflight_packed;
>>> +
>>> +	if (!(dev->protocol_features &
>>> +		(1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
>>> +		return RTE_VHOST_MSG_RESULT_OK;
>>> +
>>> +	if (!vq->inflight_packed->version) {
>>> +		vq->inflight_packed->version = INFLIGHT_VERSION;
>>> +		return RTE_VHOST_MSG_RESULT_OK;
>>> +	}
>>> +
>>> +	if ((!vq->inflight_packed))
>>> +		return RTE_VHOST_MSG_RESULT_ERR;
>>
>> It needs to be checked before before being dereferenced.
> Sorry I don't understand, you means I should check the vq pointer?

No, I meant vq->inflight_packed should be checked earlier, before
if (!vq->inflight_packed->version) {

>>> +
>>> +	inflight_packed = vq->inflight_packed;
>>> +	vq->resubmit_inflight = NULL;
>>> +	vq->global_counter = 0;
>>> +	old_used_idx = inflight_packed->old_used_idx;
>>> +
>>> +	if (inflight_packed->used_idx != old_used_idx) {
>>> +		if (inflight_packed->desc[old_used_idx].inflight == 0) {
>>> +			inflight_packed->old_used_idx =
>>> +				inflight_packed->used_idx;
>>> +			inflight_packed->old_used_wrap_counter =
>>> +				inflight_packed->used_wrap_counter;
>>> +			inflight_packed->old_free_head =
>>> +				inflight_packed->free_head;
>>> +		} else {
>>> +			inflight_packed->used_idx =
>>> +				inflight_packed->old_used_idx;
>>> +			inflight_packed->used_wrap_counter =
>>> +				inflight_packed->old_used_wrap_counter;
>>> +			inflight_packed->free_head =
>>> +				inflight_packed->old_free_head;
>>> +		}
>>> +	}
>>> +
>>> +	for (i = 0; i < inflight_packed->desc_num; i++) {
>>> +		if (inflight_packed->desc[i].inflight == 1)
>>> +			resubmit_num++;
>>> +	}
>>> +
>>> +	if (resubmit_num) {
>>> +		resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
>>> +		if (resubmit == NULL) {
>>> +			RTE_LOG(ERR, VHOST_CONFIG,
>>> +			 "Failed to allocate memory for resubmit info.\n");
>>> +			return RTE_VHOST_MSG_RESULT_ERR;
>>> +		}
>>> +
>>> +		resubmit->resubmit_list = calloc(resubmit_num,
>>> +			sizeof(struct rte_vhost_resubmit_desc));
>>> +		if (resubmit->resubmit_list == NULL) {
>>> +			RTE_LOG(ERR, VHOST_CONFIG,
>>> +			 "Failed to allocate memory for resubmit desc.\n");
>>> +			return RTE_VHOST_MSG_RESULT_ERR;
>>> +		}
>>> +
>>> +		num = 0;
>>> +		for (i = 0; i < inflight_packed->desc_num; i++) {
>>> +			if (vq->inflight_packed->desc[i].inflight == 1) {
>>> +				resubmit->resubmit_list[num].index = i;
>>> +				resubmit->resubmit_list[num].counter =
>>> +					inflight_packed->desc[i].counter;
>>> +				num++;
>>> +			}
>>> +		}
>>> +		resubmit->resubmit_num = num;
>>> +
>>> +		if (resubmit->resubmit_num > 1)
>>> +			qsort(resubmit->resubmit_list, resubmit-
>>> resubmit_num,
>>> +				sizeof(struct rte_vhost_resubmit_desc),
>>> +				resubmit_desc_compare);
>>> +
>>> +		vq->global_counter = resubmit->resubmit_list[0].counter + 1;
>>> +		vq->resubmit_inflight = resubmit;
>>> +	}
>>> +
>>> +	return RTE_VHOST_MSG_RESULT_OK;
>>> +}
> 

  reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190806182500.22320>
2019-08-29 14:12 ` [dpdk-dev] [PATCH v6 00/10] vhost: support inflight share memory protocol feature JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 01/10] vhost: add the inflight description JinYu
2019-09-06 16:37     ` Maxime Coquelin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 02/10] vhost: add packed ring JinYu
2019-09-06 16:42     ` Maxime Coquelin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 03/10] vhost: add the inflight structure JinYu
2019-09-06 16:45     ` Maxime Coquelin
2019-09-09  3:04       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 04/10] vhost: add two new messages to support a shared buffer JinYu
2019-09-06 17:22     ` Maxime Coquelin
2019-09-09  3:06       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 05/10] vhost: checkout and cleanup the resubmit inflight information JinYu
2019-09-09 10:20     ` Maxime Coquelin
2019-09-11  2:50       ` Yu, Jin
2019-09-11  8:43         ` Maxime Coquelin [this message]
2019-09-11  9:07           ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 06/10] vhost: add the APIs to operate inflight ring JinYu
2019-09-11 13:19     ` Kevin Traynor
2019-09-12  9:26     ` Maxime Coquelin
2019-09-16  1:21       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 07/10] vhost: add APIs for user getting " JinYu
2019-09-12  9:28     ` Maxime Coquelin
2019-09-16  1:20       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 08/10] vhost: fix vring functions to support packed ring JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 09/10] vhost: add an API for judging vq format JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 10/10] vhost: add vhost-user-blk example which support inflight JinYu
2019-08-30  6:07   ` [dpdk-dev] [PATCH v6 00/10] vhost: support inflight share memory protocol feature Gavin Hu (Arm Technology China)
2019-09-06 16:35   ` Maxime Coquelin
2019-09-09  4:51     ` Yu, Jin

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=32ea439d-cc3d-9dc1-7a01-b074993c26c6@redhat.com \
    --to=maxime.coquelin@redhat.com \
    --cc=changpeng.liu@intel.com \
    --cc=dev@dpdk.org \
    --cc=jin.yu@intel.com \
    --cc=lilin24@baidu.com \
    --cc=nixun@baidu.com \
    --cc=tiwei.bie@intel.com \
    --cc=zhangyu31@baidu.com \
    --cc=zhihong.wang@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK-dev Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/dpdk-dev/0 dpdk-dev/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 dpdk-dev dpdk-dev/ https://lore.kernel.org/dpdk-dev \
		dev@dpdk.org dpdk-dev@archiver.kernel.org
	public-inbox-index dpdk-dev

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.dpdk.dev


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