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From: "Xia, Chenbo" <chenbo.xia@intel.com>
To: "Li, Miao" <miao.li@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "maxime.coquelin@redhat.com" <maxime.coquelin@redhat.com>
Subject: Re: [dpdk-dev] [PATCH v3 2/5] vhost: implement rte_power_monitor API
Date: Wed, 29 Sep 2021 03:01:05 +0000	[thread overview]
Message-ID: <MWHPR11MB177557308D05EEB1CB95161D9CA99@MWHPR11MB1775.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20210924102309.231304-3-miao.li@intel.com>

Hi Miao,

> -----Original Message-----
> From: Li, Miao <miao.li@intel.com>
> Sent: Friday, September 24, 2021 6:23 PM
> To: dev@dpdk.org
> Cc: Xia, Chenbo <chenbo.xia@intel.com>; maxime.coquelin@redhat.com; Li, Miao
> <miao.li@intel.com>
> Subject: [PATCH v3 2/5] vhost: implement rte_power_monitor API
> 
> This patch defines rte_vhost_power_monitor_cond which is used to pass
> some information to vhost driver. The information is including the address
> to monitor, the expected value, the mask to extract value read from 'addr',
> the value size of monitor address, the match flag used to distinguish the
> value used to match something or not match something. Vhost driver can use
> these information to fill rte_power_monitor_cond.
> 
> Signed-off-by: Miao Li <miao.li@intel.com>
> ---
>  lib/vhost/rte_vhost.h | 41 +++++++++++++++++++++++++++++++++++++++++
>  lib/vhost/version.map |  3 +++
>  lib/vhost/vhost.c     | 38 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 82 insertions(+)
> 
> diff --git a/lib/vhost/rte_vhost.h b/lib/vhost/rte_vhost.h
> index 8d875e9322..4e1f2de12f 100644
> --- a/lib/vhost/rte_vhost.h
> +++ b/lib/vhost/rte_vhost.h
> @@ -292,6 +292,30 @@ struct vhost_device_ops {
>  	void *reserved[1]; /**< Reserved for future extension */
>  };
> 
> +/**
> + * Power monitor condition.
> + */
> +struct rte_vhost_power_monitor_cond {
> +	volatile void *addr;  /**< Address to monitor for changes */
> +	/**< If the `mask` is non-zero, location pointed
> +	 *   to by `addr` will be read and compared
> +	 *   against this value.
> +	 */
> +	uint64_t val;

Will be read and masked, then compared with this value?

> +	uint64_t mask; /**< 64-bit mask to extract value read from `addr` */
> +	/**< Data size (in bytes) that will be read from the
> +	 *   monitored memory location (`addr`). Can be 1, 2,
> +	 *   4, or 8. Supplying any other value will result in
> +	 *   an error.
> +	 */
> +	uint8_t size;
> +	/**< If 1, checking if `val` matches something.
> +	 *  If 0, checking if `val` *doesn't* match a
> +	 *  particular value.
> +	 */

If 1, and masked value that read from `addr` equals `val`, drivers can exit the
power-saving state.

If 0, ....

The overall comment can't make me understand how this struct is used if I read
the next patch.

> +	uint8_t match;

The comment style is a bit messy here. You can make every comment above variable
Definition (like val/size/match ) or make the first line the same as the variable
line (like addr/mask). 

And please update the release note(release_20_11.rst), it's a new feature.

Thanks,
Chenbo


  reply	other threads:[~2021-09-29  3:01 UTC|newest]

Thread overview: 99+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-10 13:05 [dpdk-dev] [PATCH 0/5] CPU Enabling: Implement rte_power_monitor API in virtio/vhost PMD Miao Li
2021-09-10 13:05 ` [dpdk-dev] [PATCH 1/5] net/virtio: implement rte_power_monitor API Miao Li
2021-09-15  8:45   ` Xia, Chenbo
2021-09-17  6:40     ` Li, Miao
2021-09-10 13:05 ` [dpdk-dev] [PATCH 2/5] lib/vhost: " Miao Li
2021-09-15  8:51   ` Xia, Chenbo
2021-09-17  6:51     ` Li, Miao
2021-09-10 13:05 ` [dpdk-dev] [PATCH 3/5] net/vhost: " Miao Li
2021-09-10 13:05 ` [dpdk-dev] [PATCH 4/5] lib/power: modify return of queue_stopped Miao Li
2021-09-10 13:15   ` Burakov, Anatoly
2021-09-10 13:05 ` [dpdk-dev] [PATCH 5/5] examples/l3fwd-power: support virtio/vhost Miao Li
2021-09-10  7:24   ` Maxime Coquelin
2021-09-10  8:33     ` Li, Miao
2021-09-10  8:50       ` David Marchand
2021-09-13  1:41         ` Li, Miao
2021-09-18 13:22 ` [dpdk-dev] [PATCH 0/5] Implement rte_power_monitor API in virtio/vhost PMD Miao Li
2021-09-18 13:22   ` [dpdk-dev] [PATCH 1/5] net/virtio: implement rte_power_monitor API Miao Li
2021-09-18 13:22   ` [dpdk-dev] [PATCH 2/5] vhost: " Miao Li
2021-09-18 13:22   ` [dpdk-dev] [PATCH 3/5] net/vhost: " Miao Li
2021-09-18 13:22   ` [dpdk-dev] [PATCH 4/5] power: modify return of queue_stopped Miao Li
2021-09-18 13:22   ` [dpdk-dev] [PATCH 5/5] examples/l3fwd-power: support virtio/vhost Miao Li
2021-09-24 10:23   ` [dpdk-dev] [PATCH v3 0/5] Implement rte_power_monitor API in virtio/vhost PMD Miao Li
2021-09-24 10:23     ` [dpdk-dev] [PATCH v3 1/5] net/virtio: implement rte_power_monitor API Miao Li
2021-09-29  2:34       ` Xia, Chenbo
2021-09-24 10:23     ` [dpdk-dev] [PATCH v3 2/5] vhost: " Miao Li
2021-09-29  3:01       ` Xia, Chenbo [this message]
2021-10-11  5:16         ` Li, Miao
2021-09-24 10:23     ` [dpdk-dev] [PATCH v3 3/5] net/vhost: " Miao Li
2021-09-24 10:23     ` [dpdk-dev] [PATCH v3 4/5] power: modify return of queue_stopped Miao Li
2021-09-29  3:03       ` Xia, Chenbo
2021-10-11  5:18         ` Li, Miao
2021-09-24 10:23     ` [dpdk-dev] [PATCH v3 5/5] examples/l3fwd-power: support virtio/vhost Miao Li
2021-09-29  6:53       ` Xia, Chenbo
2021-10-11  5:22         ` Li, Miao
2021-10-12 14:22     ` [dpdk-dev] [PATCH v4 0/5] Implement rte_power_monitor API in virtio/vhost PMD Miao Li
2021-10-12 14:22       ` [dpdk-dev] [PATCH v4 1/5] net/virtio: implement rte_power_monitor API Miao Li
2021-10-12 14:22       ` [dpdk-dev] [PATCH v4 2/5] vhost: " Miao Li
2021-10-12 14:22       ` [dpdk-dev] [PATCH v4 3/5] net/vhost: " Miao Li
2021-10-12 14:22       ` [dpdk-dev] [PATCH v4 4/5] power: modify return of queue_stopped Miao Li
2021-10-12 14:22       ` [dpdk-dev] [PATCH v4 5/5] examples/l3fwd-power: support virtio/vhost Miao Li
2021-10-15 15:12       ` [dpdk-dev] [PATCH v5 0/5] Implement rte_power_monitor API in virtio/vhost PMD Miao Li
2021-10-15 15:12         ` [dpdk-dev] [PATCH v5 1/5] net/virtio: implement rte_power_monitor API Miao Li
2021-10-15 15:12         ` [dpdk-dev] [PATCH v5 2/5] vhost: " Miao Li
2021-10-15  7:38           ` Xia, Chenbo
2021-10-15  8:47             ` Li, Miao
2021-10-15 15:12         ` [dpdk-dev] [PATCH v5 3/5] net/vhost: " Miao Li
2021-10-15  7:39           ` Xia, Chenbo
2021-10-15  8:49             ` Li, Miao
2021-10-15 15:12         ` [dpdk-dev] [PATCH v5 4/5] power: modify return of queue_stopped Miao Li
2021-10-15  7:47           ` Xia, Chenbo
2021-10-15  8:50             ` Li, Miao
2021-10-15 15:12         ` [dpdk-dev] [PATCH v5 5/5] examples/l3fwd-power: support virtio/vhost Miao Li
2021-10-15  8:13           ` Xia, Chenbo
2021-10-15  8:51             ` Li, Miao
2021-10-15 17:09         ` [dpdk-dev] [PATCH v6 0/5] Implement rte_power_monitor API in virtio/vhost PMD Miao Li
2021-10-15 12:57           ` Maxime Coquelin
2021-10-18  1:54             ` Li, Miao
2021-10-15 17:09           ` [dpdk-dev] [PATCH v6 1/5] net/virtio: implement rte_power_monitor API Miao Li
2021-10-15 17:09           ` [dpdk-dev] [PATCH v6 2/5] vhost: " Miao Li
2021-10-15 17:09           ` [dpdk-dev] [PATCH v6 3/5] net/vhost: " Miao Li
2021-10-15 17:09           ` [dpdk-dev] [PATCH v6 4/5] power: modify return of queue_stopped Miao Li
2021-10-15 17:09           ` [dpdk-dev] [PATCH v6 5/5] examples/l3fwd-power: support virtio/vhost Miao Li
2021-10-18 14:16           ` [dpdk-dev] [PATCH v7 0/5] Implement rte_power_monitor API in virtio/vhost PMD Miao Li
2021-10-18 14:16             ` [dpdk-dev] [PATCH v7 1/5] net/virtio: implement rte_power_monitor API Miao Li
2021-10-21 16:50               ` Ferruh Yigit
2021-10-22  8:22                 ` Li, Miao
2021-10-21 16:59               ` Ferruh Yigit
2021-10-22  8:28                 ` Li, Miao
2021-10-22  8:51                   ` Li, Miao
2021-10-22  8:59                     ` Ferruh Yigit
2021-10-22  9:02                       ` Xia, Chenbo
2021-10-22 13:41               ` David Hunt
2021-10-18 14:16             ` [dpdk-dev] [PATCH v7 2/5] vhost: " Miao Li
2021-10-19  4:38               ` Xia, Chenbo
2021-10-22 12:34                 ` David Hunt
2021-10-18 14:16             ` [dpdk-dev] [PATCH v7 3/5] net/vhost: " Miao Li
2021-10-19  4:39               ` Xia, Chenbo
2021-10-22 12:01                 ` David Hunt
2021-10-18 14:16             ` [dpdk-dev] [PATCH v7 4/5] power: modify return of queue_stopped Miao Li
2021-10-21 16:48               ` Ferruh Yigit
2021-10-22  8:20                 ` Li, Miao
2021-10-22  9:01                   ` Ferruh Yigit
2021-10-22  9:05                     ` Li, Miao
2021-10-22 11:54                 ` David Hunt
2021-10-18 14:16             ` [dpdk-dev] [PATCH v7 5/5] examples/l3fwd-power: support virtio/vhost Miao Li
2021-10-19  4:39               ` Xia, Chenbo
2021-10-22 11:50                 ` David Hunt
2021-10-21 16:58               ` Ferruh Yigit
2021-10-21 12:35             ` [dpdk-dev] [PATCH v7 0/5] Implement rte_power_monitor API in virtio/vhost PMD Maxime Coquelin
2021-10-25 14:47             ` [dpdk-dev] [PATCH v8 0/5] Support power monitor " Miao Li
2021-10-25  7:06               ` Xia, Chenbo
2021-10-28  8:03                 ` Maxime Coquelin
2021-10-25 14:47               ` [dpdk-dev] [PATCH v8 1/5] net/virtio: support power monitor Miao Li
2021-10-25 14:47               ` [dpdk-dev] [PATCH v8 2/5] vhost: add power monitor support API Miao Li
2021-10-25 14:47               ` [dpdk-dev] [PATCH v8 3/5] net/vhost: support power monitor Miao Li
2021-10-25 14:47               ` [dpdk-dev] [PATCH v8 4/5] power: modify return of queue_stopped Miao Li
2021-10-25 14:47               ` [dpdk-dev] [PATCH v8 5/5] examples/l3fwd-power: support virtio/vhost Miao Li
2021-10-29 19:09                 ` Ferruh Yigit
2021-10-29 10:34               ` [dpdk-dev] [PATCH v8 0/5] Support power monitor in virtio/vhost PMD Maxime Coquelin

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