From: "Carrillo, Erik G" <erik.g.carrillo@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>,
Phil Yang <phil.yang@arm.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
"drc@linux.vnet.ibm.com" <drc@linux.vnet.ibm.com>,
"honnappa.nagarahalli@arm.com" <honnappa.nagarahalli@arm.com>,
"ruifeng.wang@arm.com" <ruifeng.wang@arm.com>,
"dharmik.thakkar@arm.com" <dharmik.thakkar@arm.com>,
"nd@arm.com" <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH 2/3] eventdev: use c11 atomics for lcore timer armed flag
Date: Tue, 23 Jun 2020 21:31:31 +0000 [thread overview]
Message-ID: <CY4PR1101MB2118B18DB87C1CD779201305B9940@CY4PR1101MB2118.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20200623142002.6b997568@hermes.lan>
> -----Original Message-----
> From: Stephen Hemminger <stephen@networkplumber.org>
> Sent: Tuesday, June 23, 2020 4:20 PM
> To: Phil Yang <phil.yang@arm.com>
> Cc: dev@dpdk.org; Carrillo, Erik G <erik.g.carrillo@intel.com>;
> drc@linux.vnet.ibm.com; honnappa.nagarahalli@arm.com;
> ruifeng.wang@arm.com; dharmik.thakkar@arm.com; nd@arm.com
> Subject: Re: [dpdk-dev] [PATCH 2/3] eventdev: use c11 atomics for lcore
> timer armed flag
>
> On Fri, 12 Jun 2020 19:19:57 +0800
> Phil Yang <phil.yang@arm.com> wrote:
>
> > /* Track which cores have actually armed a timer */
> > struct {
> > - rte_atomic16_t v;
> > + int16_t v;
> > } __rte_cache_aligned in_use[RTE_MAX_LCORE];
>
> Do you really need this to be cache aligned (ie one per line)?
I believe I did this originally to keep a cache line from bouncing when two different cores are arming timers, so it's not strictly necessary.
> Why have a signed value for a reference count? Shouldn't it be unsigned?
next prev parent reply other threads:[~2020-06-23 21:31 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-12 11:19 [dpdk-dev] [PATCH 1/3] eventdev: fix race condition on timer list counter Phil Yang
2020-06-12 11:19 ` [dpdk-dev] [PATCH 2/3] eventdev: use c11 atomics for lcore timer armed flag Phil Yang
2020-06-23 21:01 ` Carrillo, Erik G
2020-06-28 16:12 ` Phil Yang
2020-06-23 21:20 ` Stephen Hemminger
2020-06-23 21:31 ` Carrillo, Erik G [this message]
2020-06-28 16:32 ` Phil Yang
2020-06-12 11:19 ` [dpdk-dev] [PATCH 3/3] eventdev: relax smp barriers with c11 atomics Phil Yang
2020-06-22 10:12 ` Phil Yang
2020-06-23 19:38 ` Carrillo, Erik G
2020-06-28 17:33 ` Phil Yang
2020-06-29 18:07 ` Carrillo, Erik G
2020-06-18 15:17 ` [dpdk-dev] [PATCH 1/3] eventdev: fix race condition on timer list counter Carrillo, Erik G
2020-06-18 18:25 ` Honnappa Nagarahalli
2020-06-22 9:48 ` Phil Yang
2020-07-01 11:22 ` Jerin Jacob
2020-07-02 3:28 ` Phil Yang
2020-07-02 3:26 ` Phil Yang
2020-07-02 3:56 ` Honnappa Nagarahalli
2020-07-02 21:15 ` Carrillo, Erik G
2020-07-02 21:30 ` Honnappa Nagarahalli
2020-06-22 9:09 ` Phil Yang
2020-07-02 5:26 ` [dpdk-dev] [PATCH v2 1/4] " Phil Yang
2020-07-02 5:26 ` [dpdk-dev] [PATCH v2 2/4] eventdev: use c11 atomics for lcore timer armed flag Phil Yang
2020-07-02 20:21 ` Carrillo, Erik G
2020-07-02 5:26 ` [dpdk-dev] [PATCH v2 3/4] eventdev: remove redundant code Phil Yang
2020-07-03 3:35 ` Dharmik Thakkar
2020-07-02 5:26 ` [dpdk-dev] [PATCH v2 4/4] eventdev: relax smp barriers with c11 atomics Phil Yang
2020-07-02 20:30 ` Carrillo, Erik G
2020-07-03 10:50 ` Jerin Jacob
2020-07-06 10:04 ` Thomas Monjalon
2020-07-06 15:32 ` Phil Yang
2020-07-06 15:40 ` Thomas Monjalon
2020-07-07 11:13 ` [dpdk-dev] [PATCH v3 1/4] eventdev: fix race condition on timer list counter Phil Yang
2020-07-07 11:13 ` [dpdk-dev] [PATCH v3 2/4] eventdev: use C11 atomics for lcore timer armed flag Phil Yang
2020-07-07 11:13 ` [dpdk-dev] [PATCH v3 3/4] eventdev: remove redundant code Phil Yang
2020-07-07 11:13 ` [dpdk-dev] [PATCH v3 4/4] eventdev: relax smp barriers with C11 atomics Phil Yang
2020-07-07 14:29 ` Jerin Jacob
2020-07-07 15:56 ` Phil Yang
2020-07-07 15:54 ` [dpdk-dev] [PATCH v4 1/4] eventdev: fix race condition on timer list counter Phil Yang
2020-07-07 15:54 ` [dpdk-dev] [PATCH v4 2/4] eventdev: use C11 atomics for lcore timer armed flag Phil Yang
2020-07-07 15:54 ` [dpdk-dev] [PATCH v4 3/4] eventdev: remove redundant code Phil Yang
2020-07-07 15:54 ` [dpdk-dev] [PATCH v4 4/4] eventdev: relax smp barriers with C11 atomics Phil Yang
2020-07-08 13:30 ` [dpdk-dev] [PATCH v4 1/4] eventdev: fix race condition on timer list counter Jerin Jacob
2020-07-08 15:01 ` Thomas Monjalon
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