linux-kernel - Re: [RFC PATCH 00/37] Speculative page faults

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] [day] [month] [year] [list]

Date:   Wed, 21 Jul 2021 17:03:27 +0530
From:   vjitta@...eaurora.org
To:     michel@...pinasse.org, linux-mm@...ck.org
Cc:     ldufour@...ux.ibm.com, peterz@...radead.org, mhocko@...e.com,
        willy@...radead.org, riel@...riel.com, paulmck@...nel.org,
        akpm@...ux-foundation.org, surenb@...gle.com, joelaf@...gle.com,
        romlem@...gle.com, linux-kernel@...r.kernel.org,
        vinmenon@...eaurora.org, Vijayanand Jitta <vjitta@...eaurora.org>
Subject: Re: [RFC PATCH 00/37] Speculative page faults

From: Vijayanand Jitta <vjitta@...eaurora.org>

We have tried out the SPF patch series on our code base
and have seen significant improvements in app launch
latency and ebizzy tests. Please find the results below.

App launch latency (in ms) :

Apps		w/o spf	     with spf	  % improvement
--------------------------------------------------------
Changba		1531	     1252	   18.2
Taobao		1813	     1506	   16.9
QQlive		1966	     1775	   9.7


Ebizzy test (ebizzy_64  -mRTt 8) : 

ebizzy_64  -mRTt 8	w/o spf	    with spf	% improvement
--------------------------------------------------------------
Avg_records_count	2455	    2717	10.7
Avg_real_time		10	    10		-
Avg_user_time		0.74	    0.66	10.8
Avg_sys_time		12.2	    11.6	4.9

So, getting this series mainlined would be of great help.

Thanks,
Vijay
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation