From: Raghavendra K T <raghavendra.kt@amd.com>
To: Ankur Arora <ankur.a.arora@oracle.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com,
mingo@redhat.com, luto@kernel.org, peterz@infradead.org,
paulmck@kernel.org, rostedt@goodmis.org, tglx@linutronix.de,
willy@infradead.org, jon.grimm@amd.com, bharata@amd.com,
boris.ostrovsky@oracle.com, konrad.wilk@oracle.com
Subject: Re: [PATCH v3 0/4] mm/folio_zero_user: add multi-page clearing
Date: Wed, 23 Apr 2025 14:48:50 +0530 [thread overview]
Message-ID: <e65acb10-3f33-4f41-bf25-7fa4028dd693@amd.com> (raw)
In-Reply-To: <b7423090-4504-4d68-878f-7ea4cde2af45@amd.com>
On 4/23/2025 1:42 PM, Raghavendra K T wrote:
[...]
>> Also, any idea why the huge delta in the mm/folio_zero_user 2MB, 1GB
>> cases? Both of these are doing 4k page at a time, so the huge delta
>> is a little head scratching.
>>
>> There's a gap on Milan as well but it is much smaller.
>>
>
Sorry forgot to add perhaps even more valid/important data point
> Need to think/analyze further, but from perf stat I see
> glaring difference in:
> 2M 1G
> pagefaults 32,906 202
> iTLB-load-misses 44,490 156
dTLB-loads 1,000,169 38,134
dTLB-load-misses 402,641 33,992
- Raghu
prev parent reply other threads:[~2025-04-23 9:19 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-14 3:46 Ankur Arora
2025-04-14 3:46 ` [PATCH v3 1/4] x86/clear_page: extend clear_page*() for " Ankur Arora
2025-04-14 6:32 ` Ingo Molnar
2025-04-14 11:02 ` Peter Zijlstra
2025-04-14 11:14 ` Ingo Molnar
2025-04-14 19:46 ` Ankur Arora
2025-04-14 22:26 ` Mateusz Guzik
2025-04-15 6:14 ` Ankur Arora
2025-04-15 8:22 ` Mateusz Guzik
2025-04-15 20:01 ` Ankur Arora
2025-04-15 20:32 ` Mateusz Guzik
2025-04-14 19:52 ` Ankur Arora
2025-04-14 20:09 ` Matthew Wilcox
2025-04-15 21:59 ` Ankur Arora
2025-04-14 3:46 ` [PATCH v3 2/4] x86/clear_page: add clear_pages() Ankur Arora
2025-04-14 3:46 ` [PATCH v3 3/4] huge_page: allow arch override for folio_zero_user() Ankur Arora
2025-04-14 3:46 ` [PATCH v3 4/4] x86/folio_zero_user: multi-page clearing Ankur Arora
2025-04-14 6:53 ` Ingo Molnar
2025-04-14 21:21 ` Ankur Arora
2025-04-14 7:05 ` Ingo Molnar
2025-04-15 6:36 ` Ankur Arora
2025-04-22 6:36 ` Raghavendra K T
2025-04-22 19:14 ` Ankur Arora
2025-04-15 10:16 ` Mateusz Guzik
2025-04-15 21:46 ` Ankur Arora
2025-04-15 22:01 ` Mateusz Guzik
2025-04-16 4:46 ` Ankur Arora
2025-04-17 14:06 ` Mateusz Guzik
2025-04-14 5:34 ` [PATCH v3 0/4] mm/folio_zero_user: add " Ingo Molnar
2025-04-14 19:30 ` Ankur Arora
2025-04-14 6:36 ` Ingo Molnar
2025-04-14 19:19 ` Ankur Arora
2025-04-15 19:10 ` Zi Yan
2025-04-22 19:32 ` Ankur Arora
2025-04-22 6:23 ` Raghavendra K T
2025-04-22 19:22 ` Ankur Arora
2025-04-23 8:12 ` Raghavendra K T
2025-04-23 9:18 ` Raghavendra K T [this message]
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