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From: Thomas Monjalon <thomas@monjalon.net>
To: Suanming Mou <suanmingm@nvidia.com>
Cc: dev@dpdk.org, ferruh.yigit@intel.com,
	andrew.rybchenko@oktetlabs.ru, asafp@nvidia.com
Subject: Re: [dpdk-dev] [PATCH v5 0/2] ethdev: make rte_flow API thread safe
Date: Fri, 16 Oct 2020 00:43:16 +0200
Message-ID: <8055466.jLWnYVvNTZ@thomas> (raw)
In-Reply-To: <1602724067-390536-1-git-send-email-suanmingm@nvidia.com>

15/10/2020 03:07, Suanming Mou:
> Currently, the rte_flow functions are not defined as thread safe.
> DPDK applications either call the functions in single thread or add
> locks around the functions for the critical section.
> 
> For PMDs support the flow operations thread safe natively, the
> redundant protection in application hurts the performance of the
> rte_flow operation functions.
> 
> And the restriction of thread safe not guaranteed for the rte_flow
> functions also limits the applications' expectation.
> 
> This feature is going to change the rte_flow functions to be thread
> safe. As different PMDs have different flow operations, some may
> support thread safe already and others may not. For PMDs don't
> support flow thread safe operation, a new lock is defined in ethdev
> in order to protects thread unsafe PMDs from rte_flow level.
> 
> A new RTE_ETH_DEV_FLOW_OPS_THREAD_SAFE device flag is added to
> determine whether the PMD supports thread safe flow operation or not.
> For PMDs support thread safe flow operations, set the
> RTE_ETH_DEV_FLOW_OPS_THREAD_SAFE flag, rte_flow level functions will
> skip the thread safe helper lock for these PMDs. Again the rte_flow
> level thread safe lock only works when PMD operation functions are
> not thread safe.
> 
> For the PMDs which don't want the default mutex lock, just set the
> flag in the PMD, and add the prefer type of lock in the PMD. Then
> the default mutex lock is easily replaced by the PMD level lock.
> 
> The change has no effect on the current DPDK applications. No change
> is required for the current DPDK applications. For the standard posix
> pthread_mutex, if no lock contention with the added rte_flow level
> mutex, the mutex only does the atomic increasing in
> pthread_mutex_lock() and decreasing in
> pthread_mutex_unlock(). No futex() syscall will be involved.
> 
> 
> Suanming Mou (2):
>   eal/windows: add pthread mutex lock
>   ethdev: make rte_flow API thread safe

Applied, thanks




      parent reply	other threads:[~2020-10-15 22:43 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-27  8:20 [dpdk-dev] [PATCH 0/2] ethdev: make rte flow " Suanming Mou
2020-09-27  8:20 ` [dpdk-dev] [PATCH 1/2] eal/windows: add pthread mutex lock Suanming Mou
2020-09-27 15:56   ` Dmitry Kozlyuk
2020-09-28  2:30     ` Suanming Mou
2020-09-27  8:20 ` [dpdk-dev] [PATCH 2/2] ethdev: make rte flow API thread safe Suanming Mou
2020-09-30 10:56   ` Ori Kam
2020-10-04 23:44     ` Suanming Mou
2020-10-04 23:48 ` [dpdk-dev] [PATCH v2 0/2] ethdev: make rte_flow " Suanming Mou
2020-10-04 23:48   ` [dpdk-dev] [PATCH v2 1/2] eal/windows: add pthread mutex lock Suanming Mou
2020-10-04 23:48   ` [dpdk-dev] [PATCH v2 2/2] ethdev: make rte_flow API thread safe Suanming Mou
2020-10-05 11:28     ` Ori Kam
2020-10-06 23:18       ` Ajit Khaparde
2020-10-07  0:50         ` Suanming Mou
2020-10-07  6:33           ` Ori Kam
2020-10-07 14:17 ` [dpdk-dev] [PATCH v3 0/2] " Suanming Mou
2020-10-07 14:17   ` [dpdk-dev] [PATCH v3 1/2] eal/windows: add pthread mutex lock Suanming Mou
2020-10-07 16:53     ` Dmitry Kozlyuk
2020-10-08  2:46       ` Suanming Mou
2020-10-14 10:02         ` Tal Shnaiderman
2020-10-07 14:17   ` [dpdk-dev] [PATCH v3 2/2] ethdev: make rte_flow API thread safe Suanming Mou
2020-10-07 14:42     ` Ajit Khaparde
2020-10-07 16:37       ` Ori Kam
2020-10-07 20:10     ` Matan Azrad
2020-10-08  2:56       ` Suanming Mou
2020-10-09  1:17 ` [dpdk-dev] [PATCH v4 0/2] " Suanming Mou
2020-10-09  1:17   ` [dpdk-dev] [PATCH v4 1/2] eal/windows: add pthread mutex lock Suanming Mou
2020-10-09  9:19     ` Tal Shnaiderman
2020-10-14 16:45     ` Ranjit Menon
2020-10-15  2:15     ` Narcisa Ana Maria Vasile
2020-10-15  2:18       ` Suanming Mou
2020-10-09  1:17   ` [dpdk-dev] [PATCH v4 2/2] ethdev: make rte_flow API thread safe Suanming Mou
2020-10-14 10:19     ` Thomas Monjalon
2020-10-14 10:41       ` Suanming Mou
2020-10-15  1:07 ` [dpdk-dev] [PATCH v5 0/2] " Suanming Mou
2020-10-15  1:07   ` [dpdk-dev] [PATCH v5 1/2] eal/windows: add pthread mutex lock Suanming Mou
2020-10-15  2:22     ` Narcisa Ana Maria Vasile
2020-10-15  1:07   ` [dpdk-dev] [PATCH v5 2/2] ethdev: make rte_flow API thread safe Suanming Mou
2020-10-15  8:28     ` Thomas Monjalon
2020-10-15  8:52       ` Andrew Rybchenko
2020-10-15 22:43   ` Thomas Monjalon [this message]

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