From: Jakub Kicinski <kuba@kernel.org>
To: Breno Leitao <leitao@debian.org>
Cc: davem@davemloft.net, pabeni@redhat.com, edumazet@google.com,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next v2 4/4] net: dqs: make struct dql more cache efficient
Date: Wed, 10 Apr 2024 18:45:49 -0700 [thread overview]
Message-ID: <20240410184549.5e5f77f2@kernel.org> (raw)
In-Reply-To: <ZhaZuOjq+b5nzqcs@gmail.com>
On Wed, 10 Apr 2024 06:52:56 -0700 Breno Leitao wrote:
> > Doesn't this move the cache line bouncing problem to the other side?
>
> I think so. Looking at dql_check_stall(), it only uses fields in the
> second cache line, except now 'dql->stall_thrs' that is in the first
> cache line.
We do read num_queued at the beginning of dql_completed().
So maybe we we move the read of the threshold there we will be fine.
prev parent reply other threads:[~2024-04-11 1:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-08 17:25 [PATCH v2 0/4] net : dqs: optimize if stall threshold is not set Breno Leitao
2024-04-08 17:25 ` [PATCH net-next v2 1/4] net: dql: Avoid calling BUG() when WARN() is enough Breno Leitao
2024-04-08 17:25 ` [PATCH net-next v2 2/4] net: dql: Separate queue function responsibilities Breno Leitao
2024-04-08 17:25 ` [PATCH net-next v2 3/4] net: dql: Optimize stall information population Breno Leitao
2024-04-08 17:25 ` [PATCH net-next v2 4/4] net: dqs: make struct dql more cache efficient Breno Leitao
2024-04-10 0:21 ` Jakub Kicinski
2024-04-10 13:52 ` Breno Leitao
2024-04-11 1:45 ` Jakub Kicinski [this message]
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