linux-kernel - Re: [PATCH 2/4] numa: append per-node execution info in memory.numa

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Message-ID: <e0c38e99-7a01-7a84-2030-6cb963452e81@linux.alibaba.com>
Date:   Fri, 12 Jul 2019 11:17:31 +0800
From:   王贇 <yun.wang@...ux.alibaba.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     hannes@...xchg.org, mhocko@...nel.org, vdavydov.dev@...il.com,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, mcgrof@...nel.org, keescook@...omium.org,
        linux-fsdevel@...r.kernel.org, cgroups@...r.kernel.org,
        Mel Gorman <mgorman@...e.de>, riel@...riel.com
Subject: Re: [PATCH 2/4] numa: append per-node execution info in
 memory.numa_stat



On 2019/7/11 下午9:45, Peter Zijlstra wrote:
> On Wed, Jul 03, 2019 at 11:29:15AM +0800, 王贇 wrote:
> 
>> +++ b/include/linux/memcontrol.h
>> @@ -190,6 +190,7 @@ enum memcg_numa_locality_interval {
>>
>>  struct memcg_stat_numa {
>>  	u64 locality[NR_NL_INTERVAL];
>> +	u64 exectime;
> 
> Maybe call the field jiffies, because that's what it counts.

Sure, will be in next version.

Regards,
Michael Wang

> 
>>  };
>>
>>  #endif
>> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
>> index 2edf3f5ac4b9..d5f48365770f 100644
>> --- a/mm/memcontrol.c
>> +++ b/mm/memcontrol.c
>> @@ -3575,6 +3575,18 @@ static int memcg_numa_stat_show(struct seq_file *m, void *v)
>>  		seq_printf(m, " %u", jiffies_to_msecs(sum));
>>  	}
>>  	seq_putc(m, '\n');
>> +
>> +	seq_puts(m, "exectime");
>> +	for_each_online_node(nr) {
>> +		int cpu;
>> +		u64 sum = 0;
>> +
>> +		for_each_cpu(cpu, cpumask_of_node(nr))
>> +			sum += per_cpu(memcg->stat_numa->exectime, cpu);
>> +
>> +		seq_printf(m, " %llu", jiffies_to_msecs(sum));
>> +	}
>> +	seq_putc(m, '\n');
>>  #endif
>>
>>  	return 0;