From: Arjan van de Ven <arjanvandeven@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Eric Dumazet <edumazet@google.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Chris Mason <clm@fb.com>, Arjan van de Ven <arjan@infradead.org>,
rt@linutronix.de, Rik van Riel <riel@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
George Spelvin <linux@sciencehorizons.net>,
Len Brown <lenb@kernel.org>
Subject: Re: [patch V2 00/20] timer: Refactor the timer wheel
Date: Fri, 17 Jun 2016 07:26:08 -0700 [thread overview]
Message-ID: <CADyApD2uUOasqiiX4Tvsqqpg6M0yhaFr_tmGn0pcT1OsRJqq8Q@mail.gmail.com> (raw)
In-Reply-To: <20160617121134.417319325@linutronix.de>
> To achieve this capacity with HZ=1000 without increasing the storage size
> by another level, we reduced the granularity of the first wheel level from
> 1ms to 4ms. According to our data, there is no user which relies on that
> 1ms granularity and 99% of those timers are canceled before expiry.
the only likely problem cases are msleep(1) uses... but we could just
map those to usleep(1000,2000)
(imo we should anyway)
next prev parent reply other threads:[~2016-06-17 14:26 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-17 13:26 [patch V2 00/20] timer: Refactor the timer wheel Thomas Gleixner
2016-06-17 13:26 ` [patch V2 01/20] timer: Make pinned a timer property Thomas Gleixner
2016-06-17 13:26 ` [patch V2 02/20] x86/apic/uv: Initialize timer as pinned Thomas Gleixner
2016-06-17 13:26 ` [patch V2 03/20] x86/mce: " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 05/20] driver/net/ethernet/tile: " Thomas Gleixner
2016-06-21 18:14 ` Peter Zijlstra
2016-06-17 13:26 ` [patch V2 04/20] cpufreq/powernv: " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 06/20] drivers/tty/metag_da: " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 07/20] drivers/tty/mips_ejtag: " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 08/20] net/ipv4/inet: Initialize timers " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 09/20] timer: Remove mod_timer_pinned Thomas Gleixner
2016-06-17 13:26 ` [patch V2 10/20] hlist: Add hlist_is_singular_node() helper Thomas Gleixner
2016-06-17 13:26 ` [patch V2 11/20] timer: Give a few structs and members proper names Thomas Gleixner
2016-06-17 13:26 ` [patch V2 12/20] timer: Switch to a non cascading wheel Thomas Gleixner
2016-06-18 9:55 ` George Spelvin
2016-06-24 10:06 ` Thomas Gleixner
2016-06-17 13:26 ` [patch V2 13/20] timer: Remove slack leftovers Thomas Gleixner
2016-06-17 13:26 ` [patch V2 14/20] timer: Move __run_timers() function Thomas Gleixner
2016-06-17 13:26 ` [patch V2 15/20] timer: Optimize collect timers for NOHZ Thomas Gleixner
2016-06-17 13:26 ` [patch V2 16/20] tick/sched: Remove pointless empty function Thomas Gleixner
2016-06-17 13:26 ` [patch V2 17/20] timer: Forward wheel clock whenever possible Thomas Gleixner
2016-06-17 13:26 ` [patch V2 18/20] timer: Only wake softirq if necessary Thomas Gleixner
2016-06-17 13:26 ` [patch V2 19/20] timer: Split out index calculation Thomas Gleixner
2016-06-17 13:26 ` [patch V2 20/20] timer: Optimization for same expiry time in mod_timer() Thomas Gleixner
2016-06-17 13:48 ` [patch V2 00/20] timer: Refactor the timer wheel Eric Dumazet
2016-06-17 13:57 ` Thomas Gleixner
2016-06-17 14:25 ` Eric Dumazet
2016-06-20 13:56 ` Thomas Gleixner
2016-06-20 14:46 ` Arjan van de Ven
2016-06-20 14:46 ` Thomas Gleixner
2016-06-20 14:49 ` Arjan van de Ven
2016-06-20 19:03 ` Rik van Riel
2016-06-21 2:48 ` Eric Dumazet
2016-06-17 14:26 ` Arjan van de Ven [this message]
2016-06-20 15:05 ` Paul E. McKenney
2016-06-20 15:13 ` Thomas Gleixner
2016-06-20 15:41 ` Paul E. McKenney
2016-06-22 7:37 ` Mike Galbraith
2016-06-22 8:44 ` Thomas Gleixner
2016-06-22 9:06 ` Mike Galbraith
2016-06-22 13:37 ` Mike Galbraith
2016-06-22 10:28 ` [LTP] " Cyril Hrubis
2016-06-23 8:27 ` Thomas Gleixner
2016-06-23 11:47 ` Cyril Hrubis
2016-06-23 13:58 ` George Spelvin
2016-06-23 14:10 ` Thomas Gleixner
2016-06-23 15:11 ` Cyril Hrubis
2016-06-23 15:21 ` Thomas Gleixner
2016-06-23 16:31 ` Cyril Hrubis
2016-06-26 19:00 ` Pavel Machek
2016-06-26 19:21 ` Arjan van de Ven
2016-06-26 20:02 ` Pavel Machek
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