From: Peter Zijlstra <peterz@infradead.org>
To: "Norton, Scott J" <scott.norton@hp.com>
Cc: "Long, Wai Man" <waiman.long@hp.com>,
"Low, Jason" <jason.low2@hp.com>,
"mingo@redhat.com" <mingo@redhat.com>,
"paulmck@linux.vnet.ibm.com" <paulmck@linux.vnet.ibm.com>,
"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"riel@redhat.com" <riel@redhat.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"Bueso, Davidlohr" <davidlohr@hp.com>,
"hpa@zytor.com" <hpa@zytor.com>,
"andi@firstfloor.org" <andi@firstfloor.org>,
"Chandramouleeswaran, Aswin" <aswin@hp.com>,
"Vinod, Chegu" <chegu_vinod@hp.com>
Subject: Re: [RFC][PATCH v2 5/5] mutex: Give spinners a chance to spin_on_owner if need_resched() triggered while queued
Date: Mon, 10 Feb 2014 18:01:44 +0100 [thread overview]
Message-ID: <20140210170144.GO9987@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <E2BC6EB51A09EC46A4906DEA4A9496EE0B7077AA@G9W0719.americas.hpqcorp.net>
On Thu, Feb 06, 2014 at 08:10:02PM +0000, Norton, Scott J wrote:
> > How do people run this AIM7 piece of shit? I let it run for over an hour
> > and it generated exactly 0 numbers, it just sits there eating cpu-time
> > and creating a racket from my pantry.
>
> ./reaim -s100 -e2000 -t -j100 -i100 -f workfile.high_systime
>
> The reaim.config file contains:
>
> FILESIZE 10k
> POOLSIZE 1m
> DISKDIR /t0
> DISKDIR /t1
> DISKDIR /t2
> DISKDIR /t3
> DISKDIR /t4
> DISKDIR /t5
> DISKDIR /t6
> DISKDIR /t7
> DISKDIR /t8
> DISKDIR /t9
> DISKDIR /t10
> DISKDIR /t11
> DISKDIR /t12
> DISKDIR /t13
> DISKDIR /t14
> DISKDIR /t15
>
> The way Longman uses this is to create 16 ramdisk filesystems through
> /dev/ram* and then mount those filesystems to the /t* directories.
> Although you could run it through a regular filesystem also. It will use
> whatever you place in the reaim.config file as DISKDIR. You can specify
> one or more DISKDIR directories.
OK, and we're back to creating a racket but not producing useful
numbers; how long is that crap supposed to run before it gives a number?
Surely it can produce a useful number after a few minutes of runtime..
Letting it run for hours is just a waste of time and money.
Note that I'm running this on a WSM-EP with (2*6*2) 24 CPUs and 24G of ram.
next prev parent reply other threads:[~2014-02-10 17:02 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-28 19:13 [PATCH v2 0/5] mutex: Mutex scalability patches Jason Low
2014-01-28 19:13 ` [PATCH v2 1/5] mutex: In mutex_can_spin_on_owner(), return false if task need_resched() Jason Low
2014-01-28 20:20 ` Paul E. McKenney
2014-01-28 22:01 ` Jason Low
2014-01-28 21:09 ` Davidlohr Bueso
2014-03-11 12:41 ` [tip:core/locking] locking/mutexes: Return false if task need_resched() in mutex_can_spin_on_owner() tip-bot for Jason Low
2014-01-28 19:13 ` [PATCH v2 2/5] mutex: Modify the way optimistic spinners are queued Jason Low
2014-01-28 20:23 ` Paul E. McKenney
2014-01-28 20:24 ` Paul E. McKenney
2014-01-28 21:17 ` Davidlohr Bueso
2014-01-28 22:10 ` Jason Low
2014-02-02 21:58 ` Paul E. McKenney
2014-03-11 12:41 ` [tip:core/locking] locking/mutexes: " tip-bot for Jason Low
2014-03-11 15:24 ` Jason Low
2014-03-11 15:33 ` Peter Zijlstra
2014-01-28 19:13 ` [PATCH v2 3/5] mutex: Unlock the mutex without the wait_lock Jason Low
2014-03-11 12:41 ` [tip:core/locking] locking/mutexes: " tip-bot for Jason Low
2014-03-12 12:24 ` Peter Zijlstra
2014-03-12 18:44 ` Jason Low
2014-03-13 7:28 ` [tip:core/locking] locking/mutex: Fix debug checks tip-bot for Peter Zijlstra
2014-01-28 19:13 ` [RFC][PATCH v2 4/5] mutex: Disable preemtion between modifying lock->owner and locking/unlocking mutex Jason Low
2014-01-28 20:54 ` Peter Zijlstra
2014-01-28 22:17 ` Jason Low
2014-01-28 19:13 ` [RFC][PATCH v2 5/5] mutex: Give spinners a chance to spin_on_owner if need_resched() triggered while queued Jason Low
2014-01-28 21:07 ` Peter Zijlstra
2014-01-28 22:51 ` Jason Low
2014-01-29 11:51 ` Peter Zijlstra
2014-01-31 3:29 ` Jason Low
2014-01-31 14:09 ` Peter Zijlstra
2014-01-31 20:01 ` Jason Low
2014-01-31 20:08 ` Peter Zijlstra
2014-02-02 21:01 ` Jason Low
2014-02-02 21:12 ` Peter Zijlstra
2014-02-03 18:39 ` Jason Low
2014-02-03 19:25 ` Peter Zijlstra
2014-02-03 20:55 ` Jason Low
2014-02-03 21:06 ` Peter Zijlstra
2014-02-03 21:56 ` Jason Low
2014-02-04 7:13 ` Jason Low
2014-02-02 22:02 ` Paul E. McKenney
2014-02-02 20:02 ` Peter Zijlstra
2014-02-05 21:44 ` Waiman Long
2014-02-06 14:04 ` Peter Zijlstra
2014-02-06 18:45 ` Waiman Long
2014-02-06 20:10 ` Norton, Scott J
2014-02-10 17:01 ` Peter Zijlstra [this message]
2014-02-06 17:44 ` Jason Low
2014-02-06 18:37 ` Waiman Long
2014-01-28 21:08 ` [PATCH v2 0/5] mutex: Mutex scalability patches Davidlohr Bueso
2014-01-28 23:11 ` Jason Low
2014-02-06 14:52 [RFC][PATCH v2 5/5] mutex: Give spinners a chance to spin_on_owner if need_resched() triggered while queued Daniel J Blueman
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