Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-02 Thread Andy Lutomirski
On Wed, Apr 2, 2014 at 3:05 PM, Marcelo Tosatti wrote: > On Tue, Apr 01, 2014 at 05:46:34PM -0700, Andy Lutomirski wrote: >> On Tue, Apr 1, 2014 at 5:29 PM, Marcelo Tosatti wrote: >> > On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: >> >> On Tue, Apr 1, 2014 at 11:01 AM, Marcelo

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-02 Thread Marcelo Tosatti
On Tue, Apr 01, 2014 at 05:46:34PM -0700, Andy Lutomirski wrote: > On Tue, Apr 1, 2014 at 5:29 PM, Marcelo Tosatti wrote: > > On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: > >> On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti > >> wrote: > >> > On Mon, Mar 31, 2014 at

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-02 Thread Marcelo Tosatti
On Tue, Apr 01, 2014 at 05:46:34PM -0700, Andy Lutomirski wrote: On Tue, Apr 1, 2014 at 5:29 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti mtosa...@redhat.com wrote: On

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-02 Thread Andy Lutomirski
On Wed, Apr 2, 2014 at 3:05 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Tue, Apr 01, 2014 at 05:46:34PM -0700, Andy Lutomirski wrote: On Tue, Apr 1, 2014 at 5:29 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: On Tue, Apr

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Andy Lutomirski
On Tue, Apr 1, 2014 at 5:29 PM, Marcelo Tosatti wrote: > On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: >> On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti wrote: >> > On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: >> >> On Mar 31, 2014 8:45 PM, "Marcelo

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Andy Lutomirski
On Tue, Apr 1, 2014 at 5:12 PM, Marcelo Tosatti wrote: > On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: >> On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti wrote: >> > On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: >> >> On Mar 31, 2014 8:45 PM, "Marcelo

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Marcelo Tosatti
On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: > On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti wrote: > > On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: > >> On Mar 31, 2014 8:45 PM, "Marcelo Tosatti" wrote: > >> > > >> > On Mon, Mar 31, 2014 at 10:52:25AM

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Andy Lutomirski
On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti wrote: > On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: >> On Mar 31, 2014 8:45 PM, "Marcelo Tosatti" wrote: >> > >> > On Mon, Mar 31, 2014 at 10:52:25AM -0700, Andy Lutomirski wrote: >> > > On 03/29/2014 01:47 AM, Zhanghailiang

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Marcelo Tosatti
On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: > On Mar 31, 2014 8:45 PM, "Marcelo Tosatti" wrote: > > > > On Mon, Mar 31, 2014 at 10:52:25AM -0700, Andy Lutomirski wrote: > > > On 03/29/2014 01:47 AM, Zhanghailiang wrote: > > > > Hi, > > > > I found when Guest is idle, VDSO

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Marcelo Tosatti
On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: On Mar 31, 2014 8:45 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Mon, Mar 31, 2014 at 10:52:25AM -0700, Andy Lutomirski wrote: On 03/29/2014 01:47 AM, Zhanghailiang wrote: Hi, I found when Guest is idle, VDSO

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Andy Lutomirski
On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti mtosa...@redhat.com wrote: On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: On Mar 31, 2014 8:45 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Mon, Mar 31, 2014 at 10:52:25AM -0700, Andy Lutomirski wrote: On 03/29/2014

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Marcelo Tosatti
On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti mtosa...@redhat.com wrote: On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: On Mar 31, 2014 8:45 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Mon, Mar

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Andy Lutomirski
On Tue, Apr 1, 2014 at 5:12 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti mtosa...@redhat.com wrote: On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: On Mar 31,

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-04-01 Thread Andy Lutomirski
On Tue, Apr 1, 2014 at 5:29 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Tue, Apr 01, 2014 at 12:17:16PM -0700, Andy Lutomirski wrote: On Tue, Apr 1, 2014 at 11:01 AM, Marcelo Tosatti mtosa...@redhat.com wrote: On Mon, Mar 31, 2014 at 10:33:41PM -0700, Andy Lutomirski wrote: On Mar 31,

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-31 Thread Andy Lutomirski
On Mar 31, 2014 8:45 PM, "Marcelo Tosatti" wrote: > > On Mon, Mar 31, 2014 at 10:52:25AM -0700, Andy Lutomirski wrote: > > On 03/29/2014 01:47 AM, Zhanghailiang wrote: > > > Hi, > > > I found when Guest is idle, VDSO pvclock may increase host consumption. > > > We can calcutate as follow, Correct

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-31 Thread Marcelo Tosatti
On Mon, Mar 31, 2014 at 10:52:25AM -0700, Andy Lutomirski wrote: > On 03/29/2014 01:47 AM, Zhanghailiang wrote: > > Hi, > > I found when Guest is idle, VDSO pvclock may increase host consumption. > > We can calcutate as follow, Correct me if I am wrong. > > (Host)250 * update_pvclock_gtod =

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-31 Thread Andy Lutomirski
On 03/29/2014 01:47 AM, Zhanghailiang wrote: > Hi, > I found when Guest is idle, VDSO pvclock may increase host consumption. > We can calcutate as follow, Correct me if I am wrong. > (Host)250 * update_pvclock_gtod = 1500 * gettimeofday(Guest) > In Host, VDSO pvclock introduce a notifier

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-31 Thread Andy Lutomirski
On 03/29/2014 01:47 AM, Zhanghailiang wrote: Hi, I found when Guest is idle, VDSO pvclock may increase host consumption. We can calcutate as follow, Correct me if I am wrong. (Host)250 * update_pvclock_gtod = 1500 * gettimeofday(Guest) In Host, VDSO pvclock introduce a notifier chain,

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-31 Thread Marcelo Tosatti
On Mon, Mar 31, 2014 at 10:52:25AM -0700, Andy Lutomirski wrote: On 03/29/2014 01:47 AM, Zhanghailiang wrote: Hi, I found when Guest is idle, VDSO pvclock may increase host consumption. We can calcutate as follow, Correct me if I am wrong. (Host)250 * update_pvclock_gtod = 1500 *

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-31 Thread Andy Lutomirski
On Mar 31, 2014 8:45 PM, Marcelo Tosatti mtosa...@redhat.com wrote: On Mon, Mar 31, 2014 at 10:52:25AM -0700, Andy Lutomirski wrote: On 03/29/2014 01:47 AM, Zhanghailiang wrote: Hi, I found when Guest is idle, VDSO pvclock may increase host consumption. We can calcutate as follow,

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-30 Thread Zhanghailiang
Hi Marcelo, The CPU's info is: processor : 15 vendor_id : GenuineIntel cpu family : 6 model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz stepping: 2 microcode : 12 cpu MHz : 2400.125 cache size : 12288 KB physical id

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-30 Thread Zhanghailiang
Hi Marcelo, The CPU's info is: processor : 15 vendor_id : GenuineIntel cpu family : 6 model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz stepping: 2 microcode : 12 cpu MHz : 2400.125 cache size : 12288 KB physical id

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-29 Thread Marcelo Tosatti
On Sat, Mar 29, 2014 at 08:47:27AM +, Zhanghailiang wrote: > Hi, > I found when Guest is idle, VDSO pvclock may increase host consumption. > We can calcutate as follow, Correct me if I am wrong. > (Host)250 * update_pvclock_gtod = 1500 * gettimeofday(Guest) > In Host, VDSO pvclock

VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-29 Thread Zhanghailiang
Hi, I found when Guest is idle, VDSO pvclock may increase host consumption. We can calcutate as follow, Correct me if I am wrong. (Host)250 * update_pvclock_gtod = 1500 * gettimeofday(Guest) In Host, VDSO pvclock introduce a notifier chain, pvclock_gtod_chain in timekeeping.c. It consume

VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-29 Thread Zhanghailiang
Hi, I found when Guest is idle, VDSO pvclock may increase host consumption. We can calcutate as follow, Correct me if I am wrong. (Host)250 * update_pvclock_gtod = 1500 * gettimeofday(Guest) In Host, VDSO pvclock introduce a notifier chain, pvclock_gtod_chain in timekeeping.c. It consume

Re: VDSO pvclock may increase host cpu consumption, is this a problem?

2014-03-29 Thread Marcelo Tosatti
On Sat, Mar 29, 2014 at 08:47:27AM +, Zhanghailiang wrote: Hi, I found when Guest is idle, VDSO pvclock may increase host consumption. We can calcutate as follow, Correct me if I am wrong. (Host)250 * update_pvclock_gtod = 1500 * gettimeofday(Guest) In Host, VDSO pvclock introduce a