From: Avi Kivity <avi@scylladb.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Having troubles binding an SR-IOV VF to uio_pci_generic on Amazon instance
Date: Thu, 1 Oct 2015 12:59:47 +0300 [thread overview]
Message-ID: <560D0413.5080401@scylladb.com> (raw)
In-Reply-To: <20151001124211-mutt-send-email-mst@redhat.com>
On 10/01/2015 12:55 PM, Michael S. Tsirkin wrote:
> On Thu, Oct 01, 2015 at 12:22:46PM +0300, Avi Kivity wrote:
>> It's easy to claim that
>> a solution is around the corner, only no one was looking for it, but the
>> reality is that kernel bypass has been a solution for years for high
>> performance users,
> I never said that it's trivial.
>
> It's probably a lot of work. It's definitely more work than just abusing
> sysfs.
>
> But it looks like a write system call into an eventfd is about 1.5
> microseconds on my laptop. Even with a system call per packet, system
> call overhead is not what makes DPDK drivers outperform Linux ones.
>
1.5 us = 0.6 Mpps per core limit. dpdk performance is in the tens of
millions of packets per system.
It's not just the lack of system calls, of course, the architecture is
completely different.
next prev parent reply other threads:[~2015-10-01 9:59 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-27 7:05 Vlad Zolotarov
2015-09-27 9:43 ` Michael S. Tsirkin
2015-09-27 10:50 ` Vladislav Zolotarov
2015-09-29 16:41 ` Vlad Zolotarov
2015-09-29 20:54 ` Michael S. Tsirkin
2015-09-29 21:46 ` Stephen Hemminger
2015-09-29 21:49 ` Michael S. Tsirkin
2015-09-30 10:37 ` Vlad Zolotarov
2015-09-30 10:58 ` Michael S. Tsirkin
2015-09-30 11:26 ` Vlad Zolotarov
[not found] ` <20150930143927-mutt-send-email-mst@redhat.com>
2015-09-30 11:53 ` Vlad Zolotarov
2015-09-30 12:03 ` Michael S. Tsirkin
2015-09-30 12:16 ` Vlad Zolotarov
2015-09-30 12:27 ` Michael S. Tsirkin
2015-09-30 12:50 ` Vlad Zolotarov
2015-09-30 15:26 ` Michael S. Tsirkin
2015-09-30 18:15 ` Vlad Zolotarov
2015-09-30 18:55 ` Michael S. Tsirkin
2015-09-30 19:06 ` Vlad Zolotarov
2015-09-30 19:10 ` Vlad Zolotarov
2015-09-30 19:11 ` Vlad Zolotarov
2015-09-30 19:39 ` Michael S. Tsirkin
2015-09-30 20:09 ` Vlad Zolotarov
2015-09-30 21:36 ` Stephen Hemminger
2015-09-30 21:53 ` Michael S. Tsirkin
2015-09-30 22:20 ` Vlad Zolotarov
2015-10-01 8:00 ` Vlad Zolotarov
2015-10-01 14:47 ` Stephen Hemminger
2015-10-01 15:03 ` Vlad Zolotarov
2015-09-30 13:05 ` Avi Kivity
2015-09-30 14:39 ` Michael S. Tsirkin
2015-09-30 14:53 ` Avi Kivity
2015-09-30 15:21 ` Michael S. Tsirkin
2015-09-30 15:36 ` Avi Kivity
2015-09-30 20:40 ` Michael S. Tsirkin
2015-09-30 21:00 ` Avi Kivity
2015-10-01 8:44 ` Michael S. Tsirkin
2015-10-01 8:46 ` Vlad Zolotarov
2015-10-01 8:52 ` Avi Kivity
2015-10-01 9:15 ` Michael S. Tsirkin
2015-10-01 9:22 ` Avi Kivity
2015-10-01 9:42 ` Michael S. Tsirkin
2015-10-01 9:53 ` Avi Kivity
2015-10-01 10:17 ` Michael S. Tsirkin
2015-10-01 10:24 ` Avi Kivity
2015-10-01 10:25 ` Avi Kivity
2015-10-01 10:44 ` Michael S. Tsirkin
2015-10-01 10:55 ` Avi Kivity
2015-10-01 21:17 ` Alexander Duyck
2015-10-02 13:50 ` Michael S. Tsirkin
2015-10-01 9:42 ` Vincent JARDIN
2015-10-01 9:43 ` Avi Kivity
2015-10-01 9:48 ` Vincent JARDIN
2015-10-01 9:54 ` Avi Kivity
2015-10-01 10:14 ` Michael S. Tsirkin
2015-10-01 10:23 ` Avi Kivity
2015-10-01 14:55 ` Stephen Hemminger
2015-10-01 15:49 ` Michael S. Tsirkin
2015-10-01 14:54 ` Stephen Hemminger
2015-10-01 9:55 ` Michael S. Tsirkin
2015-10-01 9:59 ` Avi Kivity [this message]
2015-10-01 10:38 ` Michael S. Tsirkin
2015-10-01 10:50 ` Avi Kivity
2015-10-01 11:09 ` Michael S. Tsirkin
2015-10-01 11:20 ` Avi Kivity
2015-10-01 11:27 ` Michael S. Tsirkin
2015-10-01 11:32 ` Avi Kivity
2015-10-01 15:01 ` Stephen Hemminger
2015-10-01 15:08 ` Avi Kivity
2015-10-01 15:46 ` Michael S. Tsirkin
2015-10-01 15:11 ` Michael S. Tsirkin
2015-10-01 15:19 ` Avi Kivity
2015-10-01 15:40 ` Michael S. Tsirkin
2015-10-01 11:31 ` Michael S. Tsirkin
2015-10-01 11:34 ` Avi Kivity
2015-10-01 11:08 ` Bruce Richardson
2015-10-01 11:23 ` Michael S. Tsirkin
2015-10-01 12:07 ` Bruce Richardson
2015-10-01 13:14 ` Michael S. Tsirkin
2015-10-01 16:04 ` Michael S. Tsirkin
2015-10-01 21:02 ` Alexander Duyck
2015-10-02 14:00 ` Michael S. Tsirkin
2015-10-02 14:07 ` Bruce Richardson
2015-10-04 9:07 ` Michael S. Tsirkin
2015-10-02 15:56 ` Gleb Natapov
2015-10-02 16:57 ` Alexander Duyck
2015-10-01 9:15 ` Avi Kivity
2015-10-01 9:29 ` Michael S. Tsirkin
2015-10-01 9:38 ` Avi Kivity
2015-10-01 10:07 ` Michael S. Tsirkin
2015-10-01 10:11 ` Avi Kivity
2015-10-01 9:16 ` Michael S. Tsirkin
2015-09-30 17:28 ` Stephen Hemminger
2015-09-30 17:39 ` Michael S. Tsirkin
2015-09-30 17:43 ` Stephen Hemminger
2015-09-30 18:50 ` Michael S. Tsirkin
2015-09-30 20:00 ` Gleb Natapov
2015-09-30 20:36 ` Michael S. Tsirkin
2015-10-01 5:04 ` Gleb Natapov
2015-09-30 17:44 ` Gleb Natapov
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