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From: Pratik Sampat <psampat@linux.ibm.com>
To: Roman Gushchin <guro@fb.com>
Cc: Dennis Zhou <dennis@kernel.org>, Tejun Heo <tj@kernel.org>,
	Christoph Lameter <cl@linux.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vlastimil Babka <vbabka@suse.cz>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	pratik.r.sampat@gmail.com
Subject: Re: [PATCH v3 0/6] percpu: partial chunk depopulation
Date: Sat, 17 Apr 2021 00:11:37 +0530	[thread overview]
Message-ID: <09a8d1eb-280d-9ee9-3d68-d065db47a516@linux.ibm.com> (raw)
In-Reply-To: <YHnYqMdyYtIdab6n@carbon.dhcp.thefacebook.com>



On 17/04/21 12:04 am, Roman Gushchin wrote:
> On Fri, Apr 16, 2021 at 11:57:03PM +0530, Pratik Sampat wrote:
>>
>> On 16/04/21 10:43 pm, Roman Gushchin wrote:
>>> On Fri, Apr 16, 2021 at 08:58:33PM +0530, Pratik Sampat wrote:
>>>> Hello Dennis,
>>>>
>>>> I apologize for the clutter of logs before, I'm pasting the logs of before and
>>>> after the percpu test in the case of the patchset being applied on 5.12-rc6 and
>>>> the vanilla kernel 5.12-rc6.
>>>>
>>>> On 16/04/21 7:48 pm, Dennis Zhou wrote:
>>>>> Hello,
>>>>>
>>>>> On Fri, Apr 16, 2021 at 06:26:15PM +0530, Pratik Sampat wrote:
>>>>>> Hello Roman,
>>>>>>
>>>>>> I've tried the v3 patch series on a POWER9 and an x86 KVM setup.
>>>>>>
>>>>>> My results of the percpu_test are as follows:
>>>>>> Intel KVM 4CPU:4G
>>>>>> Vanilla 5.12-rc6
>>>>>> # ./percpu_test.sh
>>>>>> Percpu:             1952 kB
>>>>>> Percpu:           219648 kB
>>>>>> Percpu:           219648 kB
>>>>>>
>>>>>> 5.12-rc6 + with patchset applied
>>>>>> # ./percpu_test.sh
>>>>>> Percpu:             2080 kB
>>>>>> Percpu:           219712 kB
>>>>>> Percpu:            72672 kB
>>>>>>
>>>>>> I'm able to see improvement comparable to that of what you're see too.
>>>>>>
>>>>>> However, on POWERPC I'm unable to reproduce these improvements with the patchset in the same configuration
>>>>>>
>>>>>> POWER9 KVM 4CPU:4G
>>>>>> Vanilla 5.12-rc6
>>>>>> # ./percpu_test.sh
>>>>>> Percpu:             5888 kB
>>>>>> Percpu:           118272 kB
>>>>>> Percpu:           118272 kB
>>>>>>
>>>>>> 5.12-rc6 + with patchset applied
>>>>>> # ./percpu_test.sh
>>>>>> Percpu:             6144 kB
>>>>>> Percpu:           119040 kB
>>>>>> Percpu:           119040 kB
>>>>>>
>>>>>> I'm wondering if there's any architectural specific code that needs plumbing
>>>>>> here?
>>>>>>
>>>>> There shouldn't be. Can you send me the percpu_stats debug output before
>>>>> and after?
>>>> I'll paste the whole debug stats before and after here.
>>>> 5.12-rc6 + patchset
>>>> -----BEFORE-----
>>>> Percpu Memory Statistics
>>>> Allocation Info:
>>> Hm, this looks highly suspicious. Here is your stats in a more compact form:
>>>
>>> Vanilla
>>>
>>> nr_alloc            :         9038         nr_alloc            :        97046
>>> nr_dealloc          :         6992	   nr_dealloc          :        94237
>>> nr_cur_alloc        :         2046	   nr_cur_alloc        :         2809
>>> nr_max_alloc        :         2178	   nr_max_alloc        :        90054
>>> nr_chunks           :            3	   nr_chunks           :           11
>>> nr_max_chunks       :            3	   nr_max_chunks       :           47
>>> min_alloc_size      :            4	   min_alloc_size      :            4
>>> max_alloc_size      :         1072	   max_alloc_size      :         1072
>>> empty_pop_pages     :            5	   empty_pop_pages     :           29
>>>
>>>
>>> Patched
>>>
>>> nr_alloc            :         9040         nr_alloc            :        97048
>>> nr_dealloc          :         6994	   nr_dealloc          :        95002
>>> nr_cur_alloc        :         2046	   nr_cur_alloc        :         2046
>>> nr_max_alloc        :         2208	   nr_max_alloc        :        90054
>>> nr_chunks           :            3	   nr_chunks           :           48
>>> nr_max_chunks       :            3	   nr_max_chunks       :           48
>>> min_alloc_size      :            4	   min_alloc_size      :            4
>>> max_alloc_size      :         1072	   max_alloc_size      :         1072
>>> empty_pop_pages     :           12	   empty_pop_pages     :           61
>>>
>>>
>>> So it looks like the number of chunks got bigger, as well as the number of
>>> empty_pop_pages? This contradicts to what you wrote, so can you, please, make
>>> sure that the data is correct and we're not messing two cases?
>>>
>>> So it looks like for some reason sidelined (depopulated) chunks are not getting
>>> freed completely. But I struggle to explain why the initial empty_pop_pages is
>>> bigger with the same amount of chunks.
>>>
>>> So, can you, please, apply the following patch and provide an updated statistics?
>> Unfortunately, I'm not completely well versed in this area, but yes the empty
>> pop pages number doesn't make sense to me either.
>>
>> I re-ran the numbers trying to make sure my experiment setup is sane but
>> results remain the same.
>>
>> Vanilla
>> nr_alloc            :         9040         nr_alloc            :        97048
>> nr_dealloc          :         6994	   nr_dealloc          :        94404
>> nr_cur_alloc        :         2046	   nr_cur_alloc        :         2644
>> nr_max_alloc        :         2169	   nr_max_alloc        :        90054
>> nr_chunks           :            3	   nr_chunks           :           10
>> nr_max_chunks       :            3	   nr_max_chunks       :           47
>> min_alloc_size      :            4	   min_alloc_size      :            4
>> max_alloc_size      :         1072	   max_alloc_size      :         1072
>> empty_pop_pages     :            4	   empty_pop_pages     :           32
>>
>> With the patchset + debug patch the results are as follows:
>> Patched
>>
>> nr_alloc            :         9040         nr_alloc            :        97048
>> nr_dealloc          :         6994	   nr_dealloc          :        94349
>> nr_cur_alloc        :         2046	   nr_cur_alloc        :         2699
>> nr_max_alloc        :         2194	   nr_max_alloc        :        90054
>> nr_chunks           :            3	   nr_chunks           :           48
>> nr_max_chunks       :            3	   nr_max_chunks       :           48
>> min_alloc_size      :            4	   min_alloc_size      :            4
>> max_alloc_size      :         1072	   max_alloc_size      :         1072
>> empty_pop_pages     :           12	   empty_pop_pages     :           54
>>
>> With the extra tracing I can see 39 entries of "Chunk (sidelined)"
>> after the test was run. I don't see any entries for "Chunk (to depopulate)"
>>
>> I've snipped the results of slidelined chunks because they went on for ~600
>> lines, if you need the full logs let me know.
> Yes, please! That's the most interesting part!

Got it. Pasting the full logs of after the percpu experiment was completed

Percpu Memory Statistics
Allocation Info:
----------------------------------------
   unit_size           :       655360
   static_size         :       608920
   reserved_size       :            0
   dyn_size            :        46440
   atom_size           :        65536
   alloc_size          :       655360

Global Stats:
----------------------------------------
   nr_alloc            :        97048
   nr_dealloc          :        94349
   nr_cur_alloc        :         2699
   nr_max_alloc        :        90054
   nr_chunks           :           48
   nr_max_chunks       :           48
   min_alloc_size      :            4
   max_alloc_size      :         1072
   empty_pop_pages     :           54

Per Chunk Stats:
----------------------------------------
Chunk: <- First Chunk
   nr_alloc            :         1081
   max_alloc_size      :         1072
   empty_pop_pages     :            0
   first_bit           :        16117
   free_bytes          :            4
   contig_bytes        :            4
   sum_frag            :            4
   max_frag            :            4
   cur_min_alloc       :            4
   cur_med_alloc       :            8
   cur_max_alloc       :         1072
   memcg_aware         :            0

Chunk:
   nr_alloc            :          826
   max_alloc_size      :         1072
   empty_pop_pages     :            6
   first_bit           :          819
   free_bytes          :       640660
   contig_bytes        :       249896
   sum_frag            :       464700
   max_frag            :       306216
   cur_min_alloc       :            4
   cur_med_alloc       :            8
   cur_max_alloc       :         1072
   memcg_aware         :            0

Chunk:
   nr_alloc            :            0
   max_alloc_size      :            0
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            0

Chunk:
   nr_alloc            :           90
   max_alloc_size      :         1072
   empty_pop_pages     :            0
   first_bit           :          536
   free_bytes          :       595752
   contig_bytes        :        26164
   sum_frag            :       575132
   max_frag            :        26164
   cur_min_alloc       :          156
   cur_med_alloc       :         1072
   cur_max_alloc       :         1072
   memcg_aware         :            1

Chunk:
   nr_alloc            :           90
   max_alloc_size      :         1072
   empty_pop_pages     :            0
   first_bit           :            0
   free_bytes          :       597428
   contig_bytes        :        26164
   sum_frag            :       596848
   max_frag            :        26164
   cur_min_alloc       :          156
   cur_med_alloc       :          312
   cur_max_alloc       :         1072
   memcg_aware         :            1

Chunk:
   nr_alloc            :           92
   max_alloc_size      :         1072
   empty_pop_pages     :            0
   first_bit           :            0
   free_bytes          :       595284
   contig_bytes        :        26164
   sum_frag            :       590360
   max_frag            :        26164
   cur_min_alloc       :          156
   cur_med_alloc       :          312
   cur_max_alloc       :         1072
   memcg_aware         :            1

Chunk:
   nr_alloc            :           92
   max_alloc_size      :         1072
   empty_pop_pages     :            0
   first_bit           :            0
   free_bytes          :       595284
   contig_bytes        :        26164
   sum_frag            :       583768
   max_frag            :        26164
   cur_min_alloc       :          156
   cur_med_alloc       :          312
   cur_max_alloc       :         1072
   memcg_aware         :            1

Chunk:
   nr_alloc            :          360
   max_alloc_size      :         1072
   empty_pop_pages     :            7
   first_bit           :        26595
   free_bytes          :       506640
   contig_bytes        :       506540
   sum_frag            :          100
   max_frag            :           36
   cur_min_alloc       :            4
   cur_med_alloc       :          156
   cur_max_alloc       :         1072
   memcg_aware         :            1

Chunk:
   nr_alloc            :           12
   max_alloc_size      :         1072
   empty_pop_pages     :            3
   first_bit           :            0
   free_bytes          :       647524
   contig_bytes        :       563492
   sum_frag            :        57872
   max_frag            :        26164
   cur_min_alloc       :          156
   cur_med_alloc       :          312
   cur_max_alloc       :         1072
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :           52
   max_alloc_size      :         1072
   empty_pop_pages     :            0
   first_bit           :            0
   free_bytes          :       621404
   contig_bytes        :       203104
   sum_frag            :       603400
   max_frag            :       260656
   cur_min_alloc       :          156
   cur_med_alloc       :          312
   cur_max_alloc       :         1072
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            4
   max_alloc_size      :         1072
   empty_pop_pages     :            0
   first_bit           :            0
   free_bytes          :       652748
   contig_bytes        :       570600
   sum_frag            :       570600
   max_frag            :       570600
   cur_min_alloc       :          156
   cur_med_alloc       :          312
   cur_max_alloc       :         1072
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1

Chunk (sidelined):
   nr_alloc            :            0
   max_alloc_size      :         1072
   empty_pop_pages     :            1
   first_bit           :            0
   free_bytes          :       655360
   contig_bytes        :       655360
   sum_frag            :            0
   max_frag            :            0
   cur_min_alloc       :            0
   cur_med_alloc       :            0
   cur_max_alloc       :            0
   memcg_aware         :            1



  reply	other threads:[~2021-04-16 18:41 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-08  3:57 Roman Gushchin
2021-04-08  3:57 ` [PATCH v3 1/6] percpu: fix a comment about the chunks ordering Roman Gushchin
2021-04-16 21:06   ` Dennis Zhou
2021-04-08  3:57 ` [PATCH v3 2/6] percpu: split __pcpu_balance_workfn() Roman Gushchin
2021-04-16 21:06   ` Dennis Zhou
2021-04-08  3:57 ` [PATCH v3 3/6] percpu: make pcpu_nr_empty_pop_pages per chunk type Roman Gushchin
2021-04-16 21:08   ` Dennis Zhou
2021-04-08  3:57 ` [PATCH v3 4/6] percpu: generalize pcpu_balance_populated() Roman Gushchin
2021-04-16 21:09   ` Dennis Zhou
2021-04-08  3:57 ` [PATCH v3 5/6] percpu: factor out pcpu_check_chunk_hint() Roman Gushchin
2021-04-16 21:15   ` Dennis Zhou
2021-04-08  3:57 ` [PATCH v3 6/6] percpu: implement partial chunk depopulation Roman Gushchin
2021-04-16 12:56 ` [PATCH v3 0/6] percpu: " Pratik Sampat
2021-04-16 14:18   ` Dennis Zhou
2021-04-16 15:28     ` Pratik Sampat
2021-04-16 17:13       ` Roman Gushchin
2021-04-16 18:27         ` Pratik Sampat
2021-04-16 18:34           ` Roman Gushchin
2021-04-16 18:41             ` Pratik Sampat [this message]
2021-04-16 19:09               ` Roman Gushchin
2021-04-16 19:44                 ` Pratik Sampat
2021-04-16 20:03                   ` Roman Gushchin
2021-04-17  7:08                     ` Pratik Sampat
2021-04-16 21:47                   ` Dennis Zhou
2021-04-17  7:14                     ` Pratik Sampat
2021-04-16 16:21     ` Roman Gushchin

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