lkml.org 
[lkml]   [2022]   [May]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH V2] arch_topology: support parsing cluster_id from DT
Date

>[...]
>
>> @@ -582,7 +594,8 @@ static int __init parse_cluster(struct device_node *cluster, int depth)
>> }
>>
>> if (leaf) {
>> - ret = parse_core(c, package_id, core_id++);
>> + ret = parse_core(c, package_id, (depth == 2)?cluster_id : -1,
>> + core_id++);
>> } else {
>> pr_err("%pOF: Non-leaf cluster with core %s\n",
>> cluster, name);
>> @@ -599,9 +612,6 @@ static int __init parse_cluster(struct device_node *cluster, int depth)
>> if (leaf && !has_cores)
>> pr_warn("%pOF: empty cluster\n", cluster);
>>
>> - if (leaf)
>> - package_id++;
>> -
>> return 0;
>> }
>
>The issue I mentioned under
>https://lkml.kernel.org/r/bd746cf0-0fdd-1ee6-d394-67fffb5d9b58@arm.com
>still exists.

Yes, I get it, will be fixed in V3.

>
>Btw, I recommend the following test strategy.
>
>(A) Create a set of dts files which represent today's topologies in DT:
>
> (1) 8 CPUs flat (Arm DynamIQ single DSU)
>
> (2) 2 groups of 4 CPUs (e.g. hikey 960) (which covers Phantom* domain)
>
> (3) your QC SM8450 Armv9 tri-gear (4-3-1) DynamIQ single DSU w/ shared
> L2 btwn CPU0-1 and CPU2-3.
> ...
>
> * used in Android
>
>(B) Compile dtb's
>
> dtc -I dts -O dtb -o foo.dtb foo.dts
>
>
>(C) Run them under qemu w/ and w/o CONFIG_SCHED_CLUSTER and check:
>
> sudo qemu-system-aarch64 ... -dtb foo.dtb
>
> (1) sched domains:
>
> cat /sys/kernel/debug/sched/domains/cpu*/domain*/name
>
> (2) sched flags:
>
> cat /sys/kernel/debug/sched/domains/cpu*/domain*/flags
>
> (3) cpumasks:
>
> cat /proc/schedstat | awk '{print $1 " " $2 }' | grep ^[cd]
>
>You can even mention the test results in your patch so that people see
>that you already covered them. This will speed up the review-process
>enormously.

Yes, because I'm not sure if this idea is correct. I will add it in the
next version, thank you again.

Qing
\
 
 \ /
  Last update: 2022-05-12 13:23    [W:0.092 / U:1.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site