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From: "Carrillo, Erik G" <erik.g.carrillo@intel.com>
To: David Marchand <david.marchand@redhat.com>,
	"Li, Jiu (NSB - CN/Hangzhou)" <jiu.li@nokia-sbell.com>,
	Robert Sanford <rsanford@akamai.com>
Cc: "users@dpdk.org" <users@dpdk.org>,
	Shaojie (NSB - CN/Hangzhou)" <shaojie.dong@nokia-sbell.com>,
	"Ye, Hua (NSB - CN/Hangzhou)" <hua.ye@nokia-sbell.com>,
	Risto (Nokia - FI/Oulu)" <risto.alasaarela@nokia.com>,
	"Jarvelaid, Rain (Nokia - FI/Oulu)" <rain.jarvelaid@nokia.com>,
	"Wu, Jianyue (NSB - CN/Hangzhou)" <jianyue.wu@nokia-sbell.com>,
	Jianyong (NSB - CN/Hangzhou)" <jianyong.pan@nokia-sbell.com>
Subject: Re: [dpdk-users] Integration from Dpdk18.05 to Dpdk19.11 - rte_timer_subsystem_init(void)
Date: Tue, 19 Jan 2021 16:11:31 +0000
Message-ID: <CY4PR1101MB2118243762002DA5ED322D0BB9A30@CY4PR1101MB2118.namprd11.prod.outlook.com> (raw)
In-Reply-To: <CAJFAV8zqpZALdAGoqAj7QDm+Q83RPYA9zkLHRfukToHkSgEXxg@mail.gmail.com>


Response in-line:

> -----Original Message-----
> From: David Marchand <david.marchand@redhat.com>
> Sent: Monday, January 18, 2021 2:42 AM
> To: Li, Jiu (NSB - CN/Hangzhou) <jiu.li@nokia-sbell.com>; Robert Sanford
> <rsanford@akamai.com>; Carrillo, Erik G <erik.g.carrillo@intel.com>
> Cc: users@dpdk.org; Dong, Shaojie (NSB - CN/Hangzhou)
> <shaojie.dong@nokia-sbell.com>; Ye, Hua (NSB - CN/Hangzhou)
> <hua.ye@nokia-sbell.com>; Alasaarela, Risto (Nokia - FI/Oulu)
> <risto.alasaarela@nokia.com>; Jarvelaid, Rain (Nokia - FI/Oulu)
> <rain.jarvelaid@nokia.com>; Wu, Jianyue (NSB - CN/Hangzhou)
> <jianyue.wu@nokia-sbell.com>; Pan, Jianyong (NSB - CN/Hangzhou)
> <jianyong.pan@nokia-sbell.com>
> Subject: Re: [dpdk-users] Integration from Dpdk18.05 to Dpdk19.11 -
> rte_timer_subsystem_init(void)
> On Sun, Jan 17, 2021 at 11:04 PM Li, Jiu (NSB - CN/Hangzhou) <jiu.li@nokia-
> sbell.com> wrote:
> >
> > Hello!  Dpdk experts,
> >
> > On Dpdk 18.05,  void rte_timer_subsystem_init(void)
> > On Dpdk 19.11,  int    rte_timer_subsystem_init(void) implementation
> changed, which will return 0, -EALREADY or -ENOMEM;
> >
> > There is still have  dpdk "process" mode (instead of pdkd thread mode)
> deployment in my side.
> > Can I have a question?
> >
> > If rte_timer_subsystem_init() is called one time is enough?
> > After rte_timer_subsystem_init() called with return 0 by one process , then
> other processes are able to use "rte timer" service without issue, right?
> >

rte_timer_subsystem_init() needs to be called in each process that wishes to create and manage timers. 

Note that secondary processes need to be using distinct lcores, as described here:

"All DPDK processes running as a single application and using shared memory must have distinct coremask/corelist arguments. It is not possible to have a primary and secondary instance, or two secondary instances, using any of the same logical cores. Attempting to do so can cause corruption of memory pool caches, among other issues."


> Copied timer library maintainers.
> --
> David Marchand

      reply	other threads:[~2021-01-19 16:11 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-13  2:38 Li, Jiu (NSB - CN/Hangzhou)
2021-01-18  8:41 ` David Marchand
2021-01-19 16:11   ` Carrillo, Erik G [this message]

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