From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To: Gautham R Shenoy <ego@linux.vnet.ibm.com>
Cc: Nathan Lynch <nathanl@linux.ibm.com>,
Oliver OHalloran <oliveroh@au1.ibm.com>,
Michael Neuling <mikey@linux.ibm.com>,
Michael Ellerman <michaele@au1.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
Jordan Niethe <jniethe5@gmail.com>,
Anton Blanchard <anton@au1.ibm.com>,
LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>, Nick Piggin <npiggin@au1.ibm.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Valentin Schneider <valentin.schneider@arm.com>
Subject: Re: [PATCH v2 09/10] Powerpc/smp: Create coregroup domain
Date: Wed, 22 Jul 2020 12:59:43 +0530 [thread overview]
Message-ID: <20200722072943.GD9290@linux.vnet.ibm.com> (raw)
In-Reply-To: <20200722070436.GF31038@in.ibm.com>
> > @@ -1386,6 +1421,9 @@ int setup_profiling_timer(unsigned int multiplier)
> >
> > static void fixup_topology(void)
> > {
> > + if (!has_coregroup_support())
> > + powerpc_topology[mc_idx].mask = cpu_bigcore_mask;
> > +
>
> Shouldn't we move this condition after doing the fixup for shared
> caches ? Because if we have shared_caches, but not core_group, then we
> want the coregroup domain to degenerate correctly.
>
Currently we aren't consolidating, and hence the order doesn't matter for
degeneration. However even if in future, if we want to consolidate the
domains before calling set_sched_topology(), this order would be ideal.
>
> > if (shared_caches) {
> > pr_info("Using shared cache scheduler topology\n");
> > powerpc_topology[bigcore_idx].mask = shared_cache_mask;
>
--
Thanks and Regards
Srikar Dronamraju
next prev parent reply other threads:[~2020-07-22 7:42 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-21 11:38 [PATCH v2 00/10] Coregroup support on Powerpc Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 01/10] powerpc/smp: Cache node for reuse Srikar Dronamraju
2020-07-22 7:41 ` Michael Ellerman
2020-07-22 8:04 ` Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 02/10] powerpc/smp: Merge Power9 topology with Power topology Srikar Dronamraju
2020-07-22 5:48 ` Gautham R Shenoy
2020-07-21 11:38 ` [PATCH v2 03/10] powerpc/smp: Move powerpc_topology above Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 04/10] powerpc/smp: Enable small core scheduling sooner Srikar Dronamraju
2020-07-22 5:59 ` Gautham R Shenoy
2020-07-22 6:59 ` Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 05/10] powerpc/smp: Dont assume l2-cache to be superset of sibling Srikar Dronamraju
2020-07-22 6:21 ` Gautham R Shenoy
2020-07-22 6:57 ` Srikar Dronamraju
2020-07-24 7:10 ` Gautham R Shenoy
2020-07-21 11:38 ` [PATCH v2 06/10] powerpc/smp: Generalize 2nd sched domain Srikar Dronamraju
2020-07-22 6:56 ` Gautham R Shenoy
2020-07-22 7:39 ` Srikar Dronamraju
2020-07-22 7:46 ` peterz
2020-07-22 8:18 ` Srikar Dronamraju
2020-07-22 8:48 ` Peter Zijlstra
2020-07-22 8:54 ` peterz
2020-07-21 11:38 ` [PATCH v2 07/10] Powerpc/numa: Detect support for coregroup Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 08/10] powerpc/smp: Allocate cpumask only after searching thread group Srikar Dronamraju
2020-07-21 11:38 ` [PATCH v2 09/10] Powerpc/smp: Create coregroup domain Srikar Dronamraju
2020-07-22 7:04 ` Gautham R Shenoy
2020-07-22 7:29 ` Srikar Dronamraju [this message]
2020-07-21 11:38 ` [PATCH v2 10/10] powerpc/smp: Implement cpu_to_coregroup_id Srikar Dronamraju
2020-07-22 7:06 ` Gautham R Shenoy
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