| 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
| ||
|
Date: Thu, 07 Jan 2016 13:15:33 +0100
From: Tim Sander <tim@...eglstein.org>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Thomas Gleixner <tglx@...utronix.de>,
LKML <linux-kernel@...r.kernel.org>,
linux-rt-users <linux-rt-users@...r.kernel.org>,
Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [ANNOUNCE] 4.4-rc6-rt1
Hi Sebastian
Thanks for your christmas present :-).
Am Mittwoch, 23. Dezember 2015, 23:57:55 schrieb Sebastian Andrzej Siewior:
> Please don't continue reading before christmas eve (or morning,
> depending on your schedule). If you don't celebrate christmas,
> well go ahead.
Ok, i have to admit i am a little late to the party.
> Dear RT folks!
>
> I'm pleased to announce the v4.4-rc6-rt1 patch set. I tested it on my
> AMD A10, 64bit. Nothing exploded so far, filesystem is still there.
> I haven't tested it on anything else. Before someone asks: this does not
> mean it does *not* work on ARM I simply did not try it.
With the trivial compile patch below it is working on ARM:
Specifically two Cortex A9 on a CycloneV from Altera.
The performance without load looks good:
# Total: 100000000 100000000
# Min Latencies: 00009 00009
# Avg Latencies: 00010 00010
# Max Latencies: 00022 00033
A short run with hackbench load reveals an latency "island" from 54-69µs on the first core.
There are no timer ticks with 34 to 53 µs delay.
# Total: 001000000 000999714
# Min Latencies: 00010 00009
# Avg Latencies: 00017 00010
# Max Latencies: 00069 00029
I will test further and report if i find strange occurences.
> If you are brave then download it, install it and have fun. If something
> breaks, please report it. If your machine starts blinking like a
> christmas tree while using the patch then *please* send a photo.
Sorry no photos, no special blinking.
Best regards
Tim
Signed-off-by: Tim Sander <tim@...eglstein.org>
--- linux-4.4-rc6/kernel/time/hrtimer.c.orig 2016-01-06 16:56:32.573527206 +0100
+++ linux-4.4-rc6/kernel/time/hrtimer.c 2016-01-06 16:56:48.213215320 +0100
@@ -1435,6 +1435,7 @@
#endif
+static enum hrtimer_restart hrtimer_wakeup(struct hrtimer *timer);
static void __hrtimer_run_queues(struct hrtimer_cpu_base *cpu_base, ktime_t now)
{
@@ -1490,8 +1491,6 @@
raise_softirq_irqoff(HRTIMER_SOFTIRQ);
}
-static enum hrtimer_restart hrtimer_wakeup(struct hrtimer *timer);
-
#ifdef CONFIG_HIGH_RES_TIMERS
/*
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists