linux-kernel - Re: [PATCH v5 7/7] hugetlb: parallelize 1G hugetlb initialization

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Message-Id: <AB9131A0-F9D7-4FF2-9882-A7CBCFC582F2@linux.dev>
Date: Mon, 29 Jan 2024 11:56:47 +0800
From: Muchun Song <muchun.song@...ux.dev>
To: Gang Li <gang.li@...ux.dev>
Cc: David Hildenbrand <david@...hat.com>,
 David Rientjes <rientjes@...gle.com>,
 Mike Kravetz <mike.kravetz@...cle.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Tim Chen <tim.c.chen@...ux.intel.com>,
 Linux-MM <linux-mm@...ck.org>,
 LKML <linux-kernel@...r.kernel.org>,
 ligang.bdlg@...edance.com
Subject: Re: [PATCH v5 7/7] hugetlb: parallelize 1G hugetlb initialization



> On Jan 26, 2024, at 23:24, Gang Li <gang.li@...ux.dev> wrote:
> 
> Optimizing the initialization speed of 1G huge pages through
> parallelization.
> 
> 1G hugetlbs are allocated from bootmem, a process that is already
> very fast and does not currently require optimization. Therefore,
> we focus on parallelizing only the initialization phase in
> `gather_bootmem_prealloc`.
> 
> Here are some test results:
>      test case       no patch(ms)   patched(ms)   saved
> ------------------- -------------- ------------- --------
>  256c2T(4 node) 1G           4745          2024   57.34%
>  128c1T(2 node) 1G           3358          1712   49.02%
>     12T         1G          77000         18300   76.23%
> 
> Signed-off-by: Gang Li <ligang.bdlg@...edance.com>
> Tested-by: David Rientjes <rientjes@...gle.com>

Reviewed-by: Muchun Song <muchun.song@...ux.dev>

Thanks.