From: Dave Hansen <dave.hansen@intel.com>
To: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
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: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 0/3] powerpc: Detection and scheduler optimization for POWER9 bigcore
Date: Thu, 20 Sep 2018 11:04:54 -0700 [thread overview]
Message-ID: <133c7bca-5720-81de-7956-b93870a1bab8@intel.com> (raw)
In-Reply-To: <1537464159-25919-1-git-send-email-ego@linux.vnet.ibm.com>
On 09/20/2018 10:22 AM, Gautham R. Shenoy wrote:
> -------------------------
> | L1 Cache |
> ----------------------------------
> |L2| | | | |
> | | 0 | 2 | 4 | 6 |Small Core0
> |C | | | | |
> Big |a --------------------------
> Core |c | | | | |
> |h | 1 | 3 | 5 | 7 | Small Core1
> |e | | | | |
> -----------------------------
> | L1 Cache |
> --------------------------
The scheduler already knows about shared caches. Could you elaborate on
how this is different from the situation today where we have multiple
cores sharing an L2/L3?
Adding the new sysfs stuff seems like overkill if that's all that you
are trying to do.
next prev parent reply other threads:[~2018-09-20 18:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-20 17:22 [PATCH v8 0/3] powerpc: Detection and scheduler optimization for POWER9 bigcore Gautham R. Shenoy
2018-09-20 17:22 ` [PATCH v8 1/3] powerpc: Detect the presence of big-cores via "ibm,thread-groups" Gautham R. Shenoy
2018-09-21 3:02 ` Michael Neuling
2018-09-21 17:17 ` Gautham R Shenoy
2018-09-23 23:48 ` Michael Neuling
2018-09-20 17:22 ` [PATCH v8 2/3] powerpc: Use cpu_smallcore_sibling_mask at SMT level on bigcores Gautham R. Shenoy
2018-09-20 17:22 ` [PATCH v8 3/3] powerpc/sysfs: Add topology/smallcore_thread_siblings[_list] Gautham R. Shenoy
2018-09-21 6:20 ` kbuild test robot
2018-09-21 17:20 ` Gautham R Shenoy
2018-09-20 18:04 ` Dave Hansen [this message]
2018-09-22 11:03 ` [PATCH v8 0/3] powerpc: Detection and scheduler optimization for POWER9 bigcore Gautham R Shenoy
2018-09-25 22:16 ` Dave Hansen
2018-09-26 6:06 ` Gautham R Shenoy
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