From: "Mattias Rönnblom" <mattias.ronnblom@ericsson.com>
To: David Marchand <david.marchand@redhat.com>,
Harry <harry.van.haaren@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
"Honnappa Nagarahalli" <Honnappa.Nagarahalli@arm.com>,
"Morten Brørup" <mb@smartsharesystems.com>, nd <nd@arm.com>
Subject: Re: [PATCH 1/6] service: reduce statistics overhead for parallel services
Date: Mon, 3 Oct 2022 08:40:22 +0000 [thread overview]
Message-ID: <e6d8ab9f-12ad-e1ca-09a2-2f1f61d93ec5@ericsson.com> (raw)
In-Reply-To: <CAJFAV8z5cCRFQfN8vZ=fpBiwedVGo3xhiqNDp0Haye5fpFOGQg@mail.gmail.com>
On 2022-10-03 10:06, David Marchand wrote:
> On Tue, Sep 6, 2022 at 6:17 PM Mattias Rönnblom
> <mattias.ronnblom@ericsson.com> wrote:
>>
>> Move the statistics from the service data structure to the per-lcore
>> struct. This eliminates contention for the counter cache lines, which
>> decreases the producer-side statistics overhead for services deployed
>> across many lcores.
>>
>> Prior to this patch, enabling statistics for a service with a
>> per-service function call latency of 1000 clock cycles deployed across
>> 16 cores on a Intel Xeon 6230N @ 2,3 GHz would incur a cost of ~10000
>> core clock cycles per service call. After this patch, the statistics
>> overhead is reduce to 22 clock cycles per call.
>>
>> Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
>
> Re-reading the mail archive, I found that Morten acked the series
> (replying on patch 4).
> Mattias, such a series deserved a cover letter.
>
Noted. Do you want a v2 with a cover letter?
> How does this series fit with other patches from Harry?
> https://protect2.fireeye.com/v1/url?k=31323334-501d5122-313273af-454445555731-9ac8e99afde9bc77&q=1&e=946b2bf5-b58c-4c02-b173-bba36b0b12f9&u=https%3A%2F%2Fpatchwork.dpdk.org%2Fproject%2Fdpdk%2Flist%2F%3Fseries%3D23959%26state%3D%2A
>
> Thanks.
>
The patchset I submitted is made against the above-linked patchset.
Nothing in the patchset I submitted depends on those patches. I just
assumed that Harry's patches would have been merged at the point my
patchset was considered.
I can base a v2 against the current main, if you so prefer.
next prev parent reply other threads:[~2022-10-03 8:40 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-08 12:56 [PATCH 1/2] test/service: add perf measurements for with stats mode Harry van Haaren
2022-07-08 12:56 ` [PATCH 2/2] service: fix potential stats race-condition on MT services Harry van Haaren
2022-07-08 13:23 ` Morten Brørup
2022-07-08 13:44 ` Van Haaren, Harry
2022-07-08 14:14 ` Morten Brørup
2022-07-08 13:48 ` Mattias Rönnblom
2022-07-08 15:16 ` Honnappa Nagarahalli
2022-07-08 15:31 ` Van Haaren, Harry
2022-07-08 16:21 ` Bruce Richardson
2022-07-08 16:33 ` Honnappa Nagarahalli
2022-07-08 20:02 ` Mattias Rönnblom
2022-07-08 16:29 ` Morten Brørup
2022-07-08 16:45 ` Honnappa Nagarahalli
2022-07-08 17:22 ` Morten Brørup
2022-07-08 17:39 ` Honnappa Nagarahalli
2022-07-08 18:08 ` Morten Brørup
2022-09-06 16:13 ` [PATCH 1/6] service: reduce statistics overhead for parallel services Mattias Rönnblom
2022-09-06 16:13 ` [PATCH 2/6] service: introduce per-lcore cycles counter Mattias Rönnblom
2022-09-06 16:13 ` [PATCH 3/6] service: reduce average case service core overhead Mattias Rönnblom
2022-10-03 13:33 ` Van Haaren, Harry
2022-10-03 14:32 ` Mattias Rönnblom
2022-09-06 16:13 ` [PATCH 4/6] service: tweak cycle statistics semantics Mattias Rönnblom
2022-09-07 8:41 ` Morten Brørup
2022-10-03 13:45 ` Van Haaren, Harry
2022-09-06 16:13 ` [PATCH 5/6] event/sw: report idle when no work is performed Mattias Rönnblom
2022-09-06 16:13 ` [PATCH 6/6] service: provide links to functions in documentation Mattias Rönnblom
2022-10-03 8:06 ` [PATCH 1/6] service: reduce statistics overhead for parallel services David Marchand
2022-10-03 8:40 ` Mattias Rönnblom [this message]
2022-10-03 9:53 ` David Marchand
2022-10-03 11:37 ` Mattias Rönnblom
2022-10-03 13:03 ` Van Haaren, Harry
2022-10-03 13:33 ` Van Haaren, Harry
2022-10-03 14:37 ` Mattias Rönnblom
2022-10-05 9:16 ` [PATCH v2 0/6] Service cores performance and statistics improvements Mattias Rönnblom
2022-10-05 9:16 ` [PATCH v2 1/6] service: reduce statistics overhead for parallel services Mattias Rönnblom
2022-10-05 9:16 ` [PATCH v2 2/6] service: introduce per-lcore cycles counter Mattias Rönnblom
2022-10-05 9:16 ` [PATCH v2 3/6] service: reduce average case service core overhead Mattias Rönnblom
2022-10-05 9:16 ` [PATCH v2 4/6] service: tweak cycle statistics semantics Mattias Rönnblom
2022-10-05 9:16 ` [PATCH v2 5/6] event/sw: report idle when no work is performed Mattias Rönnblom
2022-10-05 9:16 ` [PATCH v2 6/6] service: provide links to functions in documentation Mattias Rönnblom
2022-10-05 9:49 ` [PATCH v2 0/6] Service cores performance and statistics improvements Morten Brørup
2022-10-05 10:14 ` Mattias Rönnblom
2022-10-05 13:39 ` David Marchand
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