From: Michal Hocko <mhocko@suse.com>
To: Andrew Theurer <atheurer@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Lameter <cl@linux.com>,
Aaron Tomlin <atomlin@atomlin.com>,
Frederic Weisbecker <frederic@kernel.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Russell King <linux@armlinux.org.uk>,
Huacai Chen <chenhuacai@kernel.org>,
Heiko Carstens <hca@linux.ibm.com>,
x86@kernel.org, Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH v7 00/13] fold per-CPU vmstats remotely
Date: Thu, 20 Apr 2023 09:55:40 +0200 [thread overview]
Message-ID: <ZEDv/O30XLZfw/GX@dhcp22.suse.cz> (raw)
In-Reply-To: <98E08059-6607-43FF-84E3-BFF3FF193D09@redhat.com>
On Wed 19-04-23 08:44:23, Andrew Theurer wrote:
> > On Apr 19, 2023, at 6:15 AM, Marcelo Tosatti <mtosatti@redhat.com> wrote:
> >> Andrew Theurer, can you please explain what problem is the vmstat_work
> >> interruption causing in your testing?
> >
> > +CC Andrew.
>
> Nearly every telco we work with for 5G RAN is demanding <20 usec CPU
> latency as measured by cyclictest & oslat. We cannot achieve under 20
> usec with the vmstats interruption.
Are you able to get those latency requirements with PREEMPT_RT?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2023-04-20 7:55 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-20 18:03 Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 01/13] vmstat: allow_direct_reclaim should use zone_page_state_snapshot Marcelo Tosatti
2023-03-20 18:21 ` Michal Hocko
2023-03-20 18:32 ` Marcelo Tosatti
2023-03-22 10:03 ` Michal Hocko
2023-03-20 18:03 ` [PATCH v7 02/13] this_cpu_cmpxchg: ARM64: switch this_cpu_cmpxchg to locked, add _local function Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 03/13] this_cpu_cmpxchg: loongarch: " Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 04/13] this_cpu_cmpxchg: S390: " Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 05/13] this_cpu_cmpxchg: x86: " Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 06/13] add this_cpu_cmpxchg_local and asm-generic definitions Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 07/13] convert this_cpu_cmpxchg users to this_cpu_cmpxchg_local Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 08/13] mm/vmstat: switch counter modification to cmpxchg Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 09/13] vmstat: switch per-cpu vmstat counters to 32-bits Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 10/13] mm/vmstat: use xchg in cpu_vm_stats_fold Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 11/13] mm/vmstat: switch vmstat shepherd to flush per-CPU counters remotely Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 12/13] mm/vmstat: refresh stats remotely instead of via work item Marcelo Tosatti
2023-03-20 18:03 ` [PATCH v7 13/13] vmstat: add pcp remote node draining via cpu_vm_stats_fold Marcelo Tosatti
2023-03-20 20:43 ` Tim Chen
2023-03-22 1:20 ` Marcelo Tosatti
2023-03-20 18:25 ` [PATCH v7 00/13] fold per-CPU vmstats remotely Michal Hocko
2023-03-20 19:07 ` Marcelo Tosatti
2023-03-22 10:13 ` Michal Hocko
2023-03-22 11:23 ` Marcelo Tosatti
2023-03-22 13:35 ` Michal Hocko
2023-03-22 14:20 ` Marcelo Tosatti
2023-03-23 7:51 ` Michal Hocko
2023-03-23 10:52 ` Marcelo Tosatti
2023-03-23 10:59 ` Marcelo Tosatti
2023-03-23 12:17 ` Michal Hocko
2023-03-23 13:30 ` Marcelo Tosatti
2023-03-23 13:32 ` Marcelo Tosatti
2023-04-18 22:02 ` Andrew Morton
2023-04-19 11:14 ` Marcelo Tosatti
2023-04-19 11:15 ` Marcelo Tosatti
2023-04-19 13:44 ` Andrew Theurer
2023-04-20 7:55 ` Michal Hocko [this message]
2023-04-23 1:25 ` Marcelo Tosatti
2023-04-19 11:29 ` Marcelo Tosatti
2023-04-19 11:59 ` Marcelo Tosatti
2023-04-19 12:24 ` Frederic Weisbecker
2023-04-19 13:48 ` Marcelo Tosatti
2023-04-19 14:35 ` Michal Hocko
2023-04-19 16:35 ` Marcelo Tosatti
2023-04-20 8:40 ` Michal Hocko
2023-04-23 1:10 ` Marcelo Tosatti
2023-04-20 13:45 ` Marcelo Tosatti
2023-04-26 14:34 ` Marcelo Tosatti
2023-04-27 8:31 ` Michal Hocko
2023-04-27 14:59 ` Marcelo Tosatti
2023-04-26 15:04 ` Vlastimil Babka
2023-04-26 16:10 ` Marcelo Tosatti
2023-04-27 8:39 ` Michal Hocko
2023-04-27 16:25 ` Marcelo Tosatti
2023-04-19 16:47 ` Vlastimil Babka
2023-04-19 19:15 ` Marcelo Tosatti
2023-05-03 13:51 ` Marcelo Tosatti
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZEDv/O30XLZfw/GX@dhcp22.suse.cz \
--to=mhocko@suse.com \
--cc=akpm@linux-foundation.org \
--cc=atheurer@redhat.com \
--cc=atomlin@atomlin.com \
--cc=chenhuacai@kernel.org \
--cc=cl@linux.com \
--cc=frederic@kernel.org \
--cc=hca@linux.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux@armlinux.org.uk \
--cc=mtosatti@redhat.com \
--cc=vbabka@suse.cz \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox