linux-kernel - Re: [PATCH 1/1] mm/vmalloc: Combine all TLB flush operations of KASAN shadow virtual address into one operation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240730093630.5603-1-ahuang12@lenovo.com>
Date: Tue, 30 Jul 2024 17:36:30 +0800
From: Adrian Huang <adrianhuang0701@...il.com>
To: urezki@...il.com
Cc: adrianhuang0701@...il.com,
	ahuang12@...ovo.com,
	akpm@...ux-foundation.org,
	andreyknvl@...il.com,
	bhe@...hat.com,
	dvyukov@...gle.com,
	glider@...gle.com,
	hch@...radead.org,
	kasan-dev@...glegroups.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	ryabinin.a.a@...il.com,
	sunjw10@...ovo.com,
	vincenzo.frascino@....com
Subject: Re: [PATCH 1/1] mm/vmalloc: Combine all TLB flush operations of KASAN shadow virtual address into one operation 

On Mon, Jul 29, 2024 at 7:29 PM Uladzislau Rezki <urezki@...il.com> wrote:
> It would be really good if Adrian could run the "compiling workload" on
> his big system and post the statistics here.
>
> For example:
>   a) v6.11-rc1 + KASAN.
>   b) v6.11-rc1 + KASAN + patch.

Sure, please see the statistics below.

Test Result (based on 6.11-rc1)
===============================

1. Profile purge_vmap_node()

   A. Command: trace-cmd record -p function_graph -l purge_vmap_node make -j $(nproc)

   B. Average execution time of purge_vmap_node():

	no patch (us)		patched (us)	saved
	-------------		------------    -----
      	 147885.02	 	  3692.51	 97%  

   C. Total execution time of purge_vmap_node():

	no patch (us)		patched (us)	saved
	-------------		------------	-----
	  194173036		  5114138	 97%

   [ftrace log] Without patch: https://gist.github.com/AdrianHuang/a5bec861f67434e1024bbf43cea85959
   [ftrace log] With patch: https://gist.github.com/AdrianHuang/a200215955ee377288377425dbaa04e3

2. Use `time` utility to measure execution time
 
   A. Command: make clean && time make -j $(nproc)

   B. The following result is the average kernel execution time of five-time
      measurements. ('sys' field of `time` output):

	no patch (seconds)	patched (seconds)	saved
	------------------	----------------	-----
	    36932.904		   31403.478		 15%

   [`time` log] Without patch: https://gist.github.com/AdrianHuang/987b20fd0bd2bb616b3524aa6ee43112
   [`time` log] With patch: https://gist.github.com/AdrianHuang/da2ea4e6aa0b4dcc207b4e40b202f694