From: Michael Ellerman <patch-notifications@ellerman•id.au>
To: "Gautham R. Shenoy" <ego@linux•vnet.ibm.com>,
Dave Hansen <dave.hansen@intel•com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux•ibm.com>,
Srikar Dronamraju <srikar@linux•vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel•crashing.org>,
Michael Neuling <mikey@neuling•org>,
Vaidyanathan Srinivasan <svaidy@linux•vnet.ibm.com>,
Akshay Adiga <akshay.adiga@linux•vnet.ibm.com>,
Shilpasri G Bhat <shilpa.bhat@linux•vnet.ibm.com>,
"Oliver O'Halloran" <oohall@gmail•com>,
Nicholas Piggin <npiggin@gmail•com>,
Murilo Opsfelder Araujo <muriloo@linux•ibm.com>,
Anton Blanchard <anton@samba•org>
Cc: "Gautham R. Shenoy" <ego@linux•vnet.ibm.com>,
linuxppc-dev@lists•ozlabs.org, linux-kernel@vger•kernel.org
Subject: Re: [v10, 1/3] powerpc: Detect the presence of big-cores via "ibm, thread-groups"
Date: Mon, 15 Oct 2018 15:01:09 +1100 (AEDT) [thread overview]
Message-ID: <42YPr562wDzB2xb@ozlabs.org> (raw)
In-Reply-To: <1539235983-25259-2-git-send-email-ego@linux.vnet.ibm.com>
On Thu, 2018-10-11 at 05:33:01 UTC, "Gautham R. Shenoy" wrote:
> From: "Gautham R. Shenoy" <ego@linux•vnet.ibm.com>
>
> On IBM POWER9, the device tree exposes a property array identifed by
> "ibm,thread-groups" which will indicate which groups of threads share
> a particular set of resources.
>
> As of today we only have one form of grouping identifying the group of
> threads in the core that share the L1 cache, translation cache and
> instruction data flow.
>
> This patch adds helper functions to parse the contents of
> "ibm,thread-groups" and populate a per-cpu variable to cache
> information about siblings of each CPU that share the L1, traslation
> cache and instruction data-flow.
>
> It also defines a new global variable named "has_big_cores" which
> indicates if the cores on this configuration have multiple groups of
> threads that share L1 cache.
>
> For each online CPU, it maintains a cpu_smallcore_mask, which
> indicates the online siblings which share the L1-cache with it.
>
> Signed-off-by: Gautham R. Shenoy <ego@linux•vnet.ibm.com>
Series applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/425752c63b6f3fed7b5a9cba2b8101
cheers
next prev parent reply other threads:[~2018-10-15 4:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-11 5:33 [PATCH v10 0/3] powerpc: Detection and scheduler optimization for POWER9 bigcore Gautham R. Shenoy
2018-10-11 5:33 ` [PATCH v10 1/3] powerpc: Detect the presence of big-cores via "ibm, thread-groups" Gautham R. Shenoy
2018-10-12 6:58 ` [PATCH v10 1/3] powerpc: Detect the presence of big-cores via "ibm,thread-groups" Srikar Dronamraju
2018-10-15 4:01 ` Michael Ellerman [this message]
2018-10-11 5:33 ` [PATCH v10 2/3] powerpc: Use cpu_smallcore_sibling_mask at SMT level on bigcores Gautham R. Shenoy
2018-10-12 7:00 ` Srikar Dronamraju
2018-10-11 5:33 ` [PATCH v10 3/3] powerpc/cacheinfo: Report the correct shared_cpu_map on big-cores Gautham R. Shenoy
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