From: Bruce Richardson <bruce.richardson@intel.com>
To: David Marchand <david.marchand@redhat.com>
Cc: Thomas Monjalon <thomas@monjalon.net>,
"Zhang, RobinX" <robinx.zhang@intel.com>,
"Yigit, Ferruh" <ferruh.yigit@intel.com>, dev <dev@dpdk.org>,
"Zhang, Qi Z" <qi.z.zhang@intel.com>,
"Li, Xiaoyun" <xiaoyun.li@intel.com>,
"Singh, Aman Deep" <aman.deep.singh@intel.com>,
"Zhang, Yuying" <yuying.zhang@intel.com>,
"Guo, Junfeng" <junfeng.guo@intel.com>,
"Yang, SteveX" <stevex.yang@intel.com>,
Ciara Power <ciara.power@intel.com>
Subject: Re: [PATCH] app/testpmd: format dump information of module EEPROM
Date: Wed, 16 Feb 2022 10:02:41 +0000 [thread overview]
Message-ID: <YgzLwe/zRSvZKn4N@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <CAJFAV8wXnkuY7H2W43jYqG8jEnXMg=SLScjXexfxfpX+_4UsPw@mail.gmail.com>
On Wed, Feb 16, 2022 at 10:41:43AM +0100, David Marchand wrote:
> On Wed, Feb 16, 2022 at 10:31 AM Bruce Richardson
> <bruce.richardson@intel.com> wrote:
> > > > I see that we have other telemetry callbacks for stats, link status
> > > > which might already have the issue.
> > >
> > > You mean there is no lock protection? Neither in the API, nor in
> > > telemetry?
> > >
> > For reporting out stats or link status, I'm not sure a lock should ever
> > be needed since both are just read-only operations. Therefore, I don't
> > believe we have a general issue here.
>
> Ok, if you are sure about this for all drivers for stats and link status,
> you can discard my comment.
>
No, I'm not 100% sure about it, but if any driver has issues with multiple
threads reading stats simultaneously I would hope that that should be
resolved at the driver level. Normally, one would expect read-only
operations to be implicitly multi-thread safe, and I also see that the
documentation on e.g. rte_eth_stats_get() makes no reference to needing
locks or not being thread-safe.
I note too, that any such issues would not be limited to telemetry only,
but would also apply to pdump or any mechanism we would want to have for
reading information about a running process.
/Bruce
next prev parent reply other threads:[~2022-02-16 10:02 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-15 10:18 Robin Zhang
2022-02-15 13:28 ` Ferruh Yigit
2022-02-15 15:07 ` Thomas Monjalon
2022-02-16 2:26 ` Zhang, RobinX
2022-02-16 8:03 ` David Marchand
2022-02-16 8:45 ` Thomas Monjalon
2022-02-16 9:30 ` Bruce Richardson
2022-02-16 9:41 ` David Marchand
2022-02-16 10:02 ` Bruce Richardson [this message]
2022-02-16 10:15 ` David Marchand
2022-04-08 10:23 ` [PATCH v2] common/sff_module: add telemetry command to dump " Robin Zhang
2022-04-08 10:33 ` Bruce Richardson
2022-04-08 10:55 ` Zhang, RobinX
2022-04-08 11:00 ` Bruce Richardson
2022-04-08 11:20 ` Zhang, RobinX
2022-04-08 11:26 ` Bruce Richardson
2022-04-11 8:13 ` Zhang, RobinX
2022-04-11 9:13 ` Bruce Richardson
2022-04-13 12:13 ` Thomas Monjalon
2022-04-14 7:41 ` David Marchand
2022-04-20 7:00 ` [PATCH v3 0/5] add telemetry command for show " Robin Zhang
2022-04-20 7:00 ` [PATCH v3 1/5] ethdev: add telemetry command for " Robin Zhang
2022-04-20 9:16 ` Andrew Rybchenko
2022-04-20 7:00 ` [PATCH v3 2/5] ethdev: common utilities for different SFF specs Robin Zhang
2022-04-20 7:00 ` [PATCH v3 3/5] ethdev: format module EEPROM for SFF-8079 Robin Zhang
2022-04-20 7:00 ` [PATCH v3 4/5] ethdev: format module EEPROM for SFF-8472 Robin Zhang
2022-04-20 7:00 ` [PATCH v3 5/5] ethdev: format module EEPROM for SFF-8636 Robin Zhang
2022-04-20 8:49 ` [PATCH v3 0/5] add telemetry command for show module EEPROM Morten Brørup
2022-04-25 5:34 ` [PATCH v4 " Robin Zhang
2022-04-25 5:34 ` [PATCH v4 1/5] ethdev: add telemetry command for " Robin Zhang
2022-04-25 5:34 ` [PATCH v4 2/5] ethdev: common utilities for different SFF specs Robin Zhang
2022-04-25 5:34 ` [PATCH v4 3/5] ethdev: format module EEPROM for SFF-8079 Robin Zhang
2022-04-25 5:34 ` [PATCH v4 4/5] ethdev: format module EEPROM for SFF-8472 Robin Zhang
2022-04-25 5:34 ` [PATCH v4 5/5] ethdev: format module EEPROM for SFF-8636 Robin Zhang
2022-04-26 2:43 ` [PATCH v5 0/5] add telemetry command for show module EEPROM Robin Zhang
2022-04-26 2:43 ` [PATCH v5 1/5] ethdev: add telemetry command for " Robin Zhang
2022-05-04 10:16 ` Andrew Rybchenko
2022-04-26 2:43 ` [PATCH v5 2/5] ethdev: common utilities for different SFF specs Robin Zhang
2022-04-26 2:43 ` [PATCH v5 3/5] ethdev: format module EEPROM for SFF-8079 Robin Zhang
2022-04-26 2:43 ` [PATCH v5 4/5] ethdev: format module EEPROM for SFF-8472 Robin Zhang
2022-04-26 2:43 ` [PATCH v5 5/5] ethdev: format module EEPROM for SFF-8636 Robin Zhang
2022-05-04 8:13 ` [PATCH v5 0/5] add telemetry command for show module EEPROM Andrew Rybchenko
2022-05-11 2:14 ` [PATCH v6 " Robin Zhang
2022-05-11 2:14 ` [PATCH v6 1/5] ethdev: add telemetry command for " Robin Zhang
2022-05-11 2:14 ` [PATCH v6 2/5] ethdev: common utilities for different SFF specs Robin Zhang
2022-05-11 2:14 ` [PATCH v6 3/5] ethdev: format module EEPROM for SFF-8079 Robin Zhang
2022-05-11 2:14 ` [PATCH v6 4/5] ethdev: format module EEPROM for SFF-8472 Robin Zhang
2022-05-19 8:33 ` Andrew Rybchenko
2022-05-11 2:14 ` [PATCH v6 5/5] ethdev: format module EEPROM for SFF-8636 Robin Zhang
2022-05-24 6:24 ` [PATCH v7 0/5] add telemetry command for show module EEPROM Robin Zhang
2022-05-24 6:24 ` [PATCH v7 1/5] ethdev: add telemetry command for " Robin Zhang
2022-05-24 6:24 ` [PATCH v7 2/5] ethdev: common utilities for different SFF specs Robin Zhang
2022-05-24 6:24 ` [PATCH v7 3/5] ethdev: format module EEPROM for SFF-8079 Robin Zhang
2022-05-24 6:24 ` [PATCH v7 4/5] ethdev: format module EEPROM for SFF-8472 Robin Zhang
2022-05-24 6:24 ` [PATCH v7 5/5] ethdev: format module EEPROM for SFF-8636 Robin Zhang
2022-05-24 9:03 ` David Marchand
2022-05-25 2:43 ` Zhang, RobinX
2022-05-25 3:14 ` [PATCH v8 0/5] add telemetry command for show module EEPROM Robin Zhang
2022-05-25 3:14 ` [PATCH v8 1/5] ethdev: add telemetry command for " Robin Zhang
2022-05-25 9:24 ` Andrew Rybchenko
2022-05-25 3:14 ` [PATCH v8 2/5] ethdev: common utilities for different SFF specs Robin Zhang
2022-05-25 8:51 ` Andrew Rybchenko
2022-05-25 9:40 ` Andrew Rybchenko
2022-05-25 3:14 ` [PATCH v8 3/5] ethdev: format module EEPROM for SFF-8079 Robin Zhang
2022-05-25 9:55 ` Andrew Rybchenko
2022-05-25 3:14 ` [PATCH v8 4/5] ethdev: format module EEPROM for SFF-8472 Robin Zhang
2022-05-25 11:58 ` Andrew Rybchenko
2022-05-25 3:14 ` [PATCH v8 5/5] ethdev: format module EEPROM for SFF-8636 Robin Zhang
2022-05-25 9:01 ` Andrew Rybchenko
2022-05-25 12:01 ` Andrew Rybchenko
2022-05-26 7:32 ` [PATCH v9 0/5] add telemetry command for show module EEPROM Robin Zhang
2022-05-26 7:32 ` [PATCH v9 1/5] ethdev: add telemetry command for " Robin Zhang
2022-05-26 7:32 ` [PATCH v9 2/5] ethdev: add common code for different SFF specs Robin Zhang
2022-05-26 7:32 ` [PATCH v9 3/5] ethdev: support SFF-8079 module information telemetry Robin Zhang
2022-05-26 7:32 ` [PATCH v9 4/5] ethdev: support SFF-8472 " Robin Zhang
2022-05-26 7:32 ` [PATCH v9 5/5] ethdev: support SFF-8636 " Robin Zhang
2022-05-31 14:43 ` [PATCH v9 0/5] add telemetry command for show module EEPROM Andrew Rybchenko
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