linux-kernel - Re: [RFC PATCH 0/5] x86: dynamic indirect call promotion

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Message-ID: <7182c1db-2b23-5d69-7f4c-856a6ad43f8e@intel.com>
Date:   Tue, 23 Oct 2018 11:36:02 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Nadav Amit <namit@...are.com>, Ingo Molnar <mingo@...hat.com>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "H . Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, Nadav Amit <nadav.amit@...il.com>,
        x86@...nel.org, Borislav Petkov <bp@...en8.de>,
        David Woodhouse <dwmw@...zon.co.uk>
Subject: Re: [RFC PATCH 0/5] x86: dynamic indirect call promotion

On 10/17/18 5:54 PM, Nadav Amit wrote:
> 		base		relpoline
> 		----		---------
> nginx 	22898 		25178 (+10%)
> redis-ycsb	24523		25486 (+4%)
> dbench	2144		2103 (+2%)

Just out of curiosity, which indirect branches are the culprits here for
causing the slowdowns?