From: "Burakov, Anatoly" <anatoly.burakov@intel.com>
To: Yasufumi Ogawa <yasufum.o@gmail.com>
Cc: dev@dpdk.org, stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v2 1/1] fbarray: get fbarrays from containerized secondary
Date: Tue, 9 Jul 2019 11:26:18 +0100 [thread overview]
Message-ID: <35081f35-1967-93cb-096c-08761ed2658d@intel.com> (raw)
In-Reply-To: <db9e58fe-c006-e26e-4e68-86ff691b079a@intel.com>
On 09-Jul-19 11:24 AM, Burakov, Anatoly wrote:
> On 09-Jul-19 11:22 AM, Yasufumi Ogawa wrote:
>> Hi Anatoly,
>>
>> On 2019/07/05 17:53, Burakov, Anatoly wrote:
>>> On 16-Apr-19 4:43 AM, ogawa.yasufumi@lab.ntt.co.jp wrote:
>>>> From: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
>>>>
>>>> In secondary_msl_create_walk(), it creates a file for fbarrays with its
>>>> PID for reserving unique name among secondary processes. However, it
>>>> does not work if secondary is run as app container because each of
>>>> containerized secondary has PID 1. To reserve unique name, use hostname
>>>> instead of PID if the value is 1.
>>>>
>>>> Cc: stable@dpdk.org
>>>>
>>>> Signed-off-by: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
>>>> ---
>>>
>>> I'm not too well versed in containers - is this hostname 1) always
>>> set, and 2) always unique?
>> For docker, 1) hostname is always set. 2) The hostname is decided as
>> short form of container ID, so it might not be unique even though very
>> low possibility.
>>
>> I found that we can get whole container ID in `/proc/self/cgroup` as
>> discussed [1]. I think using hostname is reasonable way without
>> running many secondary processes. However, it might be better to use
>> 64 digits full container ID instead of 12 digits short ID if ensure
>> uniqueness strongly. What do yo think?
>>
>> [1]
>> https://forums.docker.com/t/get-a-containers-full-id-from-inside-of-itself/37237
>>
>
> I think it's better to err on the side of caution and guarantee better
> uniqueness. This code will get into an LTS and will be used for years to
> come :)
>
...however, i think a full 64-digit ID won't even fit into the fbarray
filename, as i believe it's limited to something like 64 chars. Perhaps
hostname would be enough after all... or we can increase fbarray name
length - that would require ABI breakage but the ABI is already broken
in this release, so it's OK i think.
--
Thanks,
Anatoly
next prev parent reply other threads:[~2019-07-09 10:26 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-16 1:59 [dpdk-stable] [PATCH] " ogawa.yasufumi
2019-04-16 3:43 ` [dpdk-stable] [PATCH v2 0/1] Get " ogawa.yasufumi
2019-04-16 3:43 ` [dpdk-stable] [PATCH v2 1/1] fbarray: get " ogawa.yasufumi
2019-07-04 20:17 ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon
2019-07-05 8:53 ` [dpdk-stable] " Burakov, Anatoly
2019-07-09 10:22 ` [dpdk-stable] [dpdk-dev] " Yasufumi Ogawa
2019-07-09 10:24 ` Burakov, Anatoly
2019-07-09 10:26 ` Burakov, Anatoly [this message]
2019-07-11 9:37 ` Yasufumi Ogawa
2019-07-11 9:43 ` Burakov, Anatoly
2019-07-11 10:31 ` [dpdk-stable] [PATCH v3 0/1] " yasufum.o
2019-07-11 10:31 ` [dpdk-stable] [PATCH v3 1/1] " yasufum.o
2019-07-11 10:53 ` Burakov, Anatoly
2019-07-11 11:57 ` Yasufumi Ogawa
2019-07-11 13:14 ` Burakov, Anatoly
2019-07-12 2:22 ` Yasufumi Ogawa
2019-07-22 1:06 ` Ogawa Yasufumi
2019-07-22 9:33 ` Burakov, Anatoly
2019-07-22 9:25 ` Burakov, Anatoly
2019-07-24 8:20 ` [dpdk-stable] [PATCH v4 0/1] " yasufum.o
2019-07-24 8:20 ` [dpdk-stable] [PATCH v4 1/1] " yasufum.o
2019-07-24 9:59 ` Burakov, Anatoly
2019-07-30 8:16 ` Thomas Monjalon
2019-07-30 9:18 ` Burakov, Anatoly
2019-07-31 5:48 ` Yasufumi Ogawa
2019-10-11 9:36 ` David Marchand
2019-10-25 15:36 ` David Marchand
2019-10-25 19:54 ` Yasufumi Ogawa
2019-10-26 16:15 ` David Marchand
2019-10-26 18:11 ` Yasufumi Ogawa
2019-10-28 8:07 ` [dpdk-stable] [PATCH v5 0/1] fbarray: fix duplicated fbarray file in secondary yasufum.o
2019-10-28 8:07 ` [dpdk-stable] [PATCH v5 1/1] " yasufum.o
2019-10-29 12:03 ` [dpdk-stable] [dpdk-dev] " Ananyev, Konstantin
2019-10-30 13:42 ` Yasufumi Ogawa
2019-10-30 19:00 ` Ananyev, Konstantin
2019-10-31 10:03 ` Yasufumi Ogawa
2019-10-31 10:32 ` Ananyev, Konstantin
2019-11-01 9:04 ` [dpdk-stable] [PATCH v6 0/1] " yasufum.o
2019-11-01 9:04 ` [dpdk-stable] [PATCH v6 1/1] " yasufum.o
2019-11-01 12:01 ` Ananyev, Konstantin
2019-11-04 10:20 ` Burakov, Anatoly
2019-11-05 10:13 ` David Marchand
2019-11-05 11:31 ` Burakov, Anatoly
2019-11-05 11:41 ` Ananyev, Konstantin
2019-11-06 10:37 ` Burakov, Anatoly
2019-11-08 3:19 ` Yasufumi Ogawa
2019-11-13 21:43 ` [dpdk-stable] [PATCH v7 0/1] " yasufum.o
2019-11-13 21:43 ` [dpdk-stable] [PATCH v7 1/1] " yasufum.o
2019-11-14 10:01 ` Burakov, Anatoly
2019-11-14 11:42 ` Yasufumi Ogawa
2019-11-14 12:27 ` David Marchand
2019-11-26 19:40 ` Yasufumi Ogawa
2019-11-27 10:26 ` Burakov, Anatoly
2019-11-14 12:55 ` David Marchand
2019-11-14 17:32 ` Ananyev, Konstantin
2023-06-13 16:51 ` [dpdk-dev] [PATCH] fbarray: get fbarrays from containerized secondary Stephen Hemminger
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