From: Stephen Hemminger <stephen@networkplumber.org>
To: Yanling Song <songyl@ramaxel.com>
Cc: <dev@dpdk.org>, <yanling.song@linux.dev>, <yanggan@ramaxel.com>,
<ferruh.yigit@intel.com>, <xuyun@ramaxel.com>
Subject: Re: [PATCH v1 01/25] drivers/net: introduce a new PMD driver
Date: Wed, 22 Dec 2021 08:55:22 -0800 [thread overview]
Message-ID: <20211222085522.4cf80006@hermes.local> (raw)
In-Reply-To: <20211222085400.0000408c@ramaxel.com>
On Wed, 22 Dec 2021 08:54:00 +0800
Yanling Song <songyl@ramaxel.com> wrote:
> > If all you want is jiffie accuracy, you could use
> > CLOCK_MONOTONIC_COARSE.
> >
> I did not get your point: CLOCK_MONOTONIC is more accurate than
> CLOCK_MONOTONIC_COARSE, right?
CLOCK_MONOTONIC ends up using the TSC counter and values in the
shared page (VDSO) to compute time accurately.
CLOCK_MONOTONIC_COARSE is faster and good enough if you only
want ms accuracy. It just reads a value from shared page
and avoids the TSC instruction.
next prev parent reply other threads:[~2021-12-22 16:55 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-18 2:51 [PATCH v1 00/25] Net/SPNIC: support SPNIC into DPDK 22.03 Yanling Song
2021-12-18 2:51 ` [PATCH v1 01/25] drivers/net: introduce a new PMD driver Yanling Song
2021-12-19 19:40 ` Stephen Hemminger
2021-12-22 0:54 ` Yanling Song
2021-12-22 16:55 ` Stephen Hemminger [this message]
2021-12-23 8:10 ` Yanling Song
2021-12-18 2:51 ` [PATCH v1 02/25] net/spnic: initialize the HW interface Yanling Song
2021-12-18 2:51 ` [PATCH v1 03/25] net/spnic: add mbox message channel Yanling Song
2021-12-18 2:51 ` [PATCH v1 04/25] net/spnic: introduce event queue Yanling Song
2021-12-18 2:51 ` [PATCH v1 05/25] net/spnic: add mgmt module Yanling Song
2021-12-18 2:51 ` [PATCH v1 06/25] net/spnic: add cmdq and work queue Yanling Song
2021-12-18 2:51 ` [PATCH v1 07/25] net/spnic: add interface handling cmdq message Yanling Song
2021-12-18 2:51 ` [PATCH v1 08/25] net/spnic: add hardware info initialization Yanling Song
2021-12-18 2:51 ` [PATCH v1 09/25] net/spnic: support MAC and link event handling Yanling Song
2021-12-18 2:51 ` [PATCH v1 10/25] net/spnic: add function info initialization Yanling Song
2021-12-18 2:51 ` [PATCH v1 11/25] net/spnic: add queue pairs context initialization Yanling Song
2021-12-18 2:51 ` [PATCH v1 12/25] net/spnic: support mbuf handling of Tx/Rx Yanling Song
2021-12-18 2:51 ` [PATCH v1 13/25] net/spnic: support Rx congfiguration Yanling Song
2021-12-18 2:51 ` [PATCH v1 14/25] net/spnic: add port/vport enable Yanling Song
2021-12-18 2:51 ` [PATCH v1 15/25] net/spnic: support IO packets handling Yanling Song
2021-12-18 2:51 ` [PATCH v1 16/25] net/spnic: add device configure/version/info Yanling Song
2021-12-20 0:23 ` Stephen Hemminger
2021-12-22 0:56 ` Yanling Song
2021-12-18 2:51 ` [PATCH v1 17/25] net/spnic: support RSS configuration update and get Yanling Song
2021-12-18 2:51 ` [PATCH v1 18/25] net/spnic: support VLAN filtering and offloading Yanling Song
2021-12-18 2:51 ` [PATCH v1 19/25] net/spnic: support promiscuous and allmulticast Rx modes Yanling Song
2021-12-18 2:51 ` [PATCH v1 20/25] net/spnic: support flow control Yanling Song
2021-12-18 2:51 ` [PATCH v1 21/25] net/spnic: support getting Tx/Rx queues info Yanling Song
2021-12-18 2:51 ` [PATCH v1 22/25] net/spnic: net/spnic: support xstats statistics Yanling Song
2021-12-18 2:51 ` [PATCH v1 23/25] net/spnic: support VFIO interrupt Yanling Song
2021-12-18 2:51 ` [PATCH v1 24/25] net/spnic: support Tx/Rx queue start/stop Yanling Song
2021-12-18 2:51 ` [PATCH v1 25/25] net/spnic: add doc infrastructure Yanling Song
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