From: Robert Hancock <hancockrwd@gmail.com>
To: seedrubbish@gmail.com
Cc: 羅秉鈞 <luobingjiun@gmail.com>, "Jeff Garzik" <jeff@garzik.org>,
linux-ide@vger.kernel.org
Subject: Re: Why is only one command issue per time in AHCI driver?
Date: Tue, 18 Jan 2011 08:43:22 -0600 [thread overview]
Message-ID: <AANLkTi=PsjJ2ndCaPowmJjRnjwHzB+xUX-PjReh7L5fx@mail.gmail.com> (raw)
In-Reply-To: <AANLkTikZc3KWEyDBfML2yxnkSX+7U-aUBJjZSSSPYPqb@mail.gmail.com>
On Tue, Jan 18, 2011 at 1:56 AM, Seed <seedrubbish@gmail.com> wrote:
> Hi Robert,
>
> On Fri, Jan 14, 2011 at 4:47 PM, Robert Hancock <hancockrwd@gmail.com> wrote:
>> That sounds like the I/O pattern doesn't result in any concurrent transfers
>> being executed. What kind of workload is this running?
>>
>
> Do you have any suggestion about how to can get such a workload?
It depends very much on what you're trying to accomplish. Last time I
checked, even booting the system or doing large sequential I/O would
result in fairly high queue depths. However if you're doing small,
single-threaded I/O, you likely won't see much or any queueing.
prev parent reply other threads:[~2011-01-18 14:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 10:52 Why is only one command issue per time in AHCI driver? 羅秉鈞
2011-01-13 17:46 ` Jeff Garzik
2011-01-14 1:06 ` 羅秉鈞
2011-01-14 5:47 ` Robert Hancock
2011-01-17 1:19 ` BingJiun Luo
2011-01-18 7:56 ` Seed
2011-01-18 8:46 ` Jeff Garzik
2011-01-18 14:43 ` Robert Hancock [this message]
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