linux-kernel - Re: [RFC PATCH 0/7] Add support for monitoring guest TLB operations

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]

Date:	Thu, 18 Aug 2016 09:04:47 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Punit Agrawal <punit.agrawal@....com>
Cc:	kvm@...r.kernel.org, Marc Zyngier <marc.zyngier@....com>,
	Will Deacon <will.deacon@....com>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...hat.com>, kvmarm@...ts.cs.columbia.edu,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC PATCH 0/7] Add support for monitoring guest TLB operations



On 17/08/2016 19:20, Punit Agrawal wrote:
> > > Having the ability to monitor the usage of guest TLB invalidations in
> > > the host can be useful to diagnose performance issues on such systems.
> >
> > Are there hardware performance counters for these operations?
> 
> That would have been ideal! There are PMU events defined for TLB
> accesses and refills but unhelpfully none of them track maintenance
> operations.

I guess the patches do make sense then. :)

Paolo