From: Marcelo Tosatti <mtosatti@redhat.com>
To: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org,
stefanha@linux.vnet.ibm.com, aliguori@us.ibm.com,
ryanh@us.ibm.com, zwu.kernel@gmail.com, kwolf@redhat.com,
pair@us.ibm.com
Subject: Re: [PATCH v8 3/4] block: add block timer and throttling algorithm
Date: Fri, 9 Sep 2011 11:44:03 -0300 [thread overview]
Message-ID: <20110909144403.GB19459@amt.cnet> (raw)
In-Reply-To: <1315476668-19812-4-git-send-email-wuzhy@linux.vnet.ibm.com>
On Thu, Sep 08, 2011 at 06:11:07PM +0800, Zhi Yong Wu wrote:
> Note:
> 1.) When bps/iops limits are specified to a small value such as 511 bytes/s, this VM will hang up. We are considering how to handle this senario.
You can increase the length of the slice, if the request is larger than
slice_time * bps_limit.
> 2.) When "dd" command is issued in guest, if its option bs is set to a large value such as "bs=1024K", the result speed will slightly bigger than the limits.
Why?
There is lots of debugging leftovers in the patch.
WARNING: multiple messages have this Message-ID (diff)
From: Marcelo Tosatti <mtosatti@redhat.com>
To: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Cc: kwolf@redhat.com, aliguori@us.ibm.com,
stefanha@linux.vnet.ibm.com, kvm@vger.kernel.org,
qemu-devel@nongnu.org, pair@us.ibm.com, zwu.kernel@gmail.com,
ryanh@us.ibm.com
Subject: Re: [Qemu-devel] [PATCH v8 3/4] block: add block timer and throttling algorithm
Date: Fri, 9 Sep 2011 11:44:03 -0300 [thread overview]
Message-ID: <20110909144403.GB19459@amt.cnet> (raw)
In-Reply-To: <1315476668-19812-4-git-send-email-wuzhy@linux.vnet.ibm.com>
On Thu, Sep 08, 2011 at 06:11:07PM +0800, Zhi Yong Wu wrote:
> Note:
> 1.) When bps/iops limits are specified to a small value such as 511 bytes/s, this VM will hang up. We are considering how to handle this senario.
You can increase the length of the slice, if the request is larger than
slice_time * bps_limit.
> 2.) When "dd" command is issued in guest, if its option bs is set to a large value such as "bs=1024K", the result speed will slightly bigger than the limits.
Why?
There is lots of debugging leftovers in the patch.
next prev parent reply other threads:[~2011-09-09 14:44 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-08 10:11 [PATCH v8 0/4] The intro of QEMU block I/O throttling Zhi Yong Wu
2011-09-08 10:11 ` [Qemu-devel] " Zhi Yong Wu
2011-09-08 10:11 ` [PATCH v8 1/4] block: add the block queue support Zhi Yong Wu
2011-09-08 10:11 ` [Qemu-devel] " Zhi Yong Wu
2011-09-23 15:32 ` Kevin Wolf
2011-09-23 15:32 ` [Qemu-devel] " Kevin Wolf
2011-09-26 8:01 ` Zhi Yong Wu
2011-09-26 8:01 ` Zhi Yong Wu
2011-10-17 10:17 ` Kevin Wolf
2011-10-17 10:17 ` Kevin Wolf
2011-10-17 10:17 ` Paolo Bonzini
2011-10-18 7:00 ` Zhi Yong Wu
2011-10-18 7:00 ` Zhi Yong Wu
2011-10-18 8:07 ` Zhi Yong Wu
2011-10-18 8:07 ` [Qemu-devel] " Zhi Yong Wu
2011-10-18 8:36 ` Kevin Wolf
2011-10-18 8:36 ` Kevin Wolf
2011-10-18 9:29 ` Zhi Yong Wu
2011-10-18 9:29 ` Zhi Yong Wu
2011-10-18 9:56 ` Kevin Wolf
2011-10-18 9:56 ` Kevin Wolf
2011-10-18 13:29 ` Zhi Yong Wu
2011-10-18 13:29 ` Zhi Yong Wu
2011-09-08 10:11 ` [PATCH v8 2/4] block: add the command line support Zhi Yong Wu
2011-09-08 10:11 ` [Qemu-devel] " Zhi Yong Wu
2011-09-23 15:54 ` Kevin Wolf
2011-09-23 15:54 ` [Qemu-devel] " Kevin Wolf
2011-09-26 6:15 ` Zhi Yong Wu
2011-09-26 6:15 ` [Qemu-devel] " Zhi Yong Wu
2011-10-17 10:19 ` Kevin Wolf
2011-10-17 10:19 ` Kevin Wolf
2011-10-18 8:17 ` Zhi Yong Wu
2011-10-18 8:17 ` [Qemu-devel] " Zhi Yong Wu
2011-09-08 10:11 ` [PATCH v8 3/4] block: add block timer and throttling algorithm Zhi Yong Wu
2011-09-08 10:11 ` [Qemu-devel] " Zhi Yong Wu
2011-09-09 14:44 ` Marcelo Tosatti [this message]
2011-09-09 14:44 ` Marcelo Tosatti
2011-09-13 3:09 ` Zhi Yong Wu
2011-09-13 3:09 ` [Qemu-devel] " Zhi Yong Wu
2011-09-14 10:50 ` Marcelo Tosatti
2011-09-14 10:50 ` [Qemu-devel] " Marcelo Tosatti
2011-09-19 9:55 ` Zhi Yong Wu
2011-09-19 9:55 ` [Qemu-devel] " Zhi Yong Wu
2011-09-20 12:34 ` Marcelo Tosatti
2011-09-20 12:34 ` [Qemu-devel] " Marcelo Tosatti
2011-09-21 3:14 ` Zhi Yong Wu
2011-09-21 3:14 ` [Qemu-devel] " Zhi Yong Wu
2011-09-21 5:54 ` Zhi Yong Wu
2011-09-21 5:54 ` [Qemu-devel] " Zhi Yong Wu
2011-09-21 7:03 ` Zhi Yong Wu
2011-09-21 7:03 ` [Qemu-devel] " Zhi Yong Wu
2011-09-26 8:15 ` Zhi Yong Wu
2011-09-26 8:15 ` [Qemu-devel] " Zhi Yong Wu
2011-09-23 16:19 ` Kevin Wolf
2011-09-23 16:19 ` [Qemu-devel] " Kevin Wolf
2011-09-26 7:24 ` Zhi Yong Wu
2011-09-26 7:24 ` [Qemu-devel] " Zhi Yong Wu
2011-10-17 10:26 ` Kevin Wolf
2011-10-17 10:26 ` Kevin Wolf
2011-10-17 15:54 ` Stefan Hajnoczi
2011-10-17 15:54 ` Stefan Hajnoczi
2011-10-18 8:29 ` Zhi Yong Wu
2011-10-18 8:29 ` Zhi Yong Wu
2011-10-18 8:43 ` Zhi Yong Wu
2011-10-18 8:43 ` Zhi Yong Wu
2011-09-08 10:11 ` [PATCH v8 4/4] qmp/hmp: add block_set_io_throttle Zhi Yong Wu
2011-09-08 10:11 ` [Qemu-devel] " Zhi Yong Wu
-- strict thread matches above, loose matches on Subject: below --
2011-09-07 12:41 [PATCH v8 3/4] block: add block timer and throttling algorithm Zhi Yong Wu
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