From: David Marchand <david.marchand@6wind.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 1/2] virtio: initialize iopl when device is initialized
Date: Fri, 6 Mar 2015 23:04:33 +0100 [thread overview]
Message-ID: <CALwxeUuGMh5q2O6zxOEkUaNUyehxmb_0ruvf+hsq_Y7nfNF2-Q@mail.gmail.com> (raw)
In-Reply-To: <20150306085514.1b0ecbd2@urahara>
On Fri, Mar 6, 2015 at 5:55 PM, Stephen Hemminger <
stephen@networkplumber.org> wrote:
> No virtio_dev_init is called too late, after interrupt handling
> threads are spawned.
>
> /* Launch threads, called at application init(). */
> int
> rte_eal_init(int argc, char **argv)
> {
> int i, fctret, ret;
> ...
> if (rte_eal_intr_init() < 0)
> rte_panic("Cannot init interrupt-handling thread\n");
> ...
>
> if (rte_eal_dev_init() < 0)
> rte_panic("Cannot init pmd devices\n"
>
There is no "io level" loss when going through fork and/or daemon : this
affirmation contradicts the manual and my test programs.
Now, looking at the problem from scratch, the constructor in virtio pmd
does not call iopl().
It registers a driver with an init function called from rte_eal_dev_init().
So iopl() is not called at "_start" time (in both virtio static or shared
object cases), but in rte_eal_dev_init().
In the end, the fix would be to move rte_eal_intr_init() after
rte_eal_dev_init().
Can you test this ?
Thanks.
--
David Marchand
next prev parent reply other threads:[~2015-03-06 22:04 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-06 0:45 [dpdk-dev] [PATCH 0/2] virtio: bugfixes Stephen Hemminger
2015-03-06 0:45 ` [dpdk-dev] [PATCH 1/2] virtio: initialize iopl when device is initialized Stephen Hemminger
2015-03-06 3:41 ` Ouyang, Changchun
2015-03-06 16:20 ` Stephen Hemminger
2015-03-06 16:33 ` David Marchand
2015-03-06 16:55 ` Stephen Hemminger
2015-03-06 22:04 ` David Marchand [this message]
2015-03-06 23:43 ` Stephen Hemminger
2015-03-07 6:53 ` David Marchand
2015-03-09 11:05 ` David Marchand
2015-03-09 14:56 ` [dpdk-dev] [PATCH 0/2] fix virtio interrupt handling David Marchand
2015-03-09 14:56 ` [dpdk-dev] [PATCH 1/2] eal/linux: move plugin load to very start of eal init David Marchand
2015-03-09 15:21 ` Neil Horman
[not found] ` <CALwxeUs4hPbYDPBUfz9u2AoiCoj_wwTsAyj=_1xxzuT6LLW6nw@mail.gmail.com>
2015-03-10 10:55 ` Neil Horman
2015-10-14 0:05 ` Stephen Hemminger
2015-10-14 9:55 ` David Marchand
2015-03-09 14:56 ` [dpdk-dev] [PATCH 2/2] virtio: change io privilege level as early as possible David Marchand
2015-03-10 13:14 ` Neil Horman
2015-09-29 19:25 ` Stephen Hemminger
2015-09-30 8:28 ` David Marchand
2015-09-30 14:52 ` Neil Horman
2015-09-30 15:37 ` Thomas Monjalon
2015-09-30 17:26 ` Stephen Hemminger
2015-10-01 11:25 ` Neil Horman
2015-10-12 20:08 ` Stephen Hemminger
2015-10-14 0:07 ` Stephen Hemminger
2015-10-14 8:00 ` David Marchand
2015-10-14 9:49 ` David Marchand
2015-10-14 9:50 ` [dpdk-dev] [PATCH] eal: move interrupt init after device init David Marchand
2015-10-14 11:32 ` David Marchand
2015-10-20 21:22 ` Thomas Monjalon
2015-07-29 17:26 ` [dpdk-dev] [PATCH 1/2] virtio: initialize iopl when device is initialized Thomas Monjalon
2015-03-06 0:45 ` [dpdk-dev] [PATCH 2/2] virtio: allow running w/o vlan filtering Stephen Hemminger
2015-03-06 3:39 ` Ouyang, Changchun
2015-03-06 16:24 ` Stephen Hemminger
2015-07-29 12:56 ` Thomas Monjalon
2015-07-30 1:23 ` Ouyang, Changchun
2015-08-04 12:51 ` Vincent JARDIN
2015-08-05 1:01 ` Ouyang, Changchun
2015-08-05 1:22 ` Stephen Hemminger
2015-08-05 10:49 ` Vincent JARDIN
2015-10-21 13:58 ` Thomas Monjalon
2017-02-15 8:38 ` Thomas Monjalon
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