[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681 --- Comment #29 from Roger Pau Monné --- Created attachment 179717 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=179717&action=edit Initial debug patch -- You are receiving this mail because: You are the assignee for the bug.

[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681 --- Comment #28 from Roger Pau Monné --- (In reply to rainer from comment #26) Thanks! This shows that the guest is mostly inactive (low CPU load), is this correct? I'm attaching a patch to add some debug to blkfront, please be aware tha

[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681 --- Comment #27 from rai...@ultra-secure.de --- (In reply to Roger Pau Monné from comment #25) (freebsd11 ) 0 # kldload pmc kldload: can't load pmc: module already loaded or in kernel (freebsd11 ) 1 # kldstat Id Refs AddressSi

[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681 --- Comment #26 from rai...@ultra-secure.de --- Created attachment 179716 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=179716&action=edit flamegraph dtrace This is running the example on Brendan's page with dtrace. While the V

[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681 --- Comment #24 from rai...@ultra-secure.de --- ok, (freebsd11 ) 64 # pmccontrol -L SOFT CLOCK.PROF CLOCK.HARD CLOCK.STAT LOCK.FAILED PAGE_FAULT.ALL PAGE_FAULT.READ PAGE_FAULT.WRITE

[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681 --- Comment #25 from Roger Pau Monné --- IIRC this was working fine last time I've tried. Have you loaded the pmc module (kldload pmc), and which CPU are you using? Note that you also need to enable the PMU support in Xen [0] by passing vp

[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681 --- Comment #23 from rai...@ultra-secure.de --- Which event specifier should I use? I can't even run the sample: (freebsd11 ) 0 # pmcstat –S RESOURCE_STALLS.ANY -O out.pmcstat sleep 10 pmcstat: [options] [commandline] Measure proc

答复: 答复: [PATCH]netfront: need release all resources after adding and removing NICs time and again

Hi Roger, I am so sorry and please review tne below URL: https://lists.freebsd.org/pipermail/freebsd-xen/2017-February/002957.html 发件人：freebsd xen 收件人：刘迎冬 抄送：freebsd-xen@freebsd.org,索奔,赵军,王林凯,储召松,王春风,高晓东 时间：2017-02-07 18:44:16 主题:Re: 答复: [PATCH]netfront: need release all resources after a

Re: 答复: [PATCH]netfront: need release all resources after adding and removing NICs time and again

On Mon, Feb 06, 2017 at 01:54:28PM +, Liuyingdong wrote: > Hello Roger, > I want to know what about these patch, Please let me know if you have > any questions. > If you think these patch are fine, I want to your checking-in plan. > Thanks! Hello, Which patches should I look at

[Bug 212681] I/O is slow for FreeBSD DOMu on XenServer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212681 --- Comment #22 from Roger Pau Monné --- Hello, I don't have much time to look into this right now, could you try to create a flamegraph [0] of this workload, this way we might be able to identify the bottleneck(s). If possible you should