Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1679882

Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using PCID

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.kernel
Subject Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using PCID
Date 2017-07-03 13:00 +0200
Message-ID <tZ7fb-eM-9@gated-at.bofh.it> (permalink)
References <tXK1k-11t-7@gated-at.bofh.it> <tXK1l-11t-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

On Thu, 29 Jun 2017, Andy Lutomirski wrote:
> ping-pong between two mms on the same CPU using eventfd:
>   patched:         1.22µs
>   patched, nopcid: 1.33µs
>   unpatched:       1.34µs
> 
> Same ping-pong, but now touch 512 pages (all zero-page to minimize
> cache misses) each iteration.  dTLB misses are measured by
> dtlb_load_misses.miss_causes_a_walk:
>   patched:         1.8µs  11M  dTLB misses
>   patched, nopcid: 6.2µs, 207M dTLB misses
>   unpatched:       6.1µs, 190M dTLB misses
> 
> Reviewed-by: Nadav Amit <nadav.amit@gmail.com>
> Signed-off-by: Andy Lutomirski <luto@kernel.org>

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using PCID Andy Lutomirski <luto@kernel.org> - 2017-06-29 18:00 +0200
  Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using  PCID Thomas Gleixner <tglx@linutronix.de> - 2017-07-03 13:00 +0200
  Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using  PCID Peter Zijlstra <peterz@infradead.org> - 2017-07-05 14:20 +0200
    Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using PCID Andy Lutomirski <luto@kernel.org> - 2017-07-05 18:10 +0200
      Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using  PCID Peter Zijlstra <peterz@infradead.org> - 2017-07-05 19:10 +0200
        Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using  PCID Ingo Molnar <mingo@kernel.org> - 2017-07-18 11:00 +0200
  Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using  PCID Peter Zijlstra <peterz@infradead.org> - 2017-07-05 14:30 +0200
    Re: [PATCH v4 10/10] x86/mm: Try to preserve old TLB entries using PCID Andy Lutomirski <luto@kernel.org> - 2017-07-05 18:20 +0200

csiph-web