On Tue, Dec 11, 2007 at 09:35:56PM -0800, Greg KH wrote: > On Wed, Dec 12, 2007 at 08:08:36AM +0530, Dhaval Giani wrote: > > > > This patch adds documentation about /sys/kernel/uids/<uid>/cpu_share > > to Documentation/ABI. > > > > Signed-off-by: Dhaval Giani <[EMAIL PROTECTED]> > > > > --- > > Documentation/ABI/testing/sysfs-kernel-uids | 10 ++++++++++ > > 1 files changed, 10 insertions(+) > > > > Index: current/Documentation/ABI/testing/sysfs-kernel-uids > > =================================================================== > > --- /dev/null > > +++ current/Documentation/ABI/testing/sysfs-kernel-uids > > @@ -0,0 +1,10 @@ > > +What: /sys/kernel/uids/<uid>/cpu_shares > > +Date: December 2007 > > +Contact: Dhaval Giani <[EMAIL PROTECTED]> > > + Srivatsa Vaddagiri <[EMAIL PROTECTED]> > > +Description: > > + The /sys/kernel/uids/<uid>/cpu_shares tunable is used > > + to set the cpu bandwidth a user is allowed. This is a > > + propotional value. What that means is that if there > > + are two users logged in, each with shares 1024, they > > + will get equal CPU bandwidth. > > Hm, how about describing the units here? Can you put "10" in each file > and everyone will get the same share? 100? 1? 1024 seems like an odd > "share" number. Unless there is some other document you wish to refer > people to do help describe these values? >
It is proportional. That is, if two users have same value for shares, they will get equal bandwidth on the CPU. If they are in the ratio 1:2, then they will share it in that ratio. I've updated the patch for this. Hope it is clearer. Thanks, -- This patch adds documentation about /sys/kernel/uids/<uid>/cpu_share to Documentation/ABI. Signed-off-by: Dhaval Giani <[EMAIL PROTECTED]> --- Documentation/ABI/testing/sysfs-kernel-uids | 14 ++++++++++++++ 1 files changed, 14 insertions(+) Index: current/Documentation/ABI/testing/sysfs-kernel-uids =================================================================== --- /dev/null +++ current/Documentation/ABI/testing/sysfs-kernel-uids @@ -0,0 +1,14 @@ +What: /sys/kernel/uids/<uid>/cpu_shares +Date: December 2007 +Contact: Dhaval Giani <[EMAIL PROTECTED]> + Srivatsa Vaddagiri <[EMAIL PROTECTED]> +Description: + The /sys/kernel/uids/<uid>/cpu_shares tunable is used + to set the cpu bandwidth a user is allowed. This is a + propotional value. What that means is that if there + are two users logged in, each with an equal number of + shares, then they will get equal CPU bandwidth. Another + example would be, if User A has shares = 1024 and user + B has shares = 2048, User B will get twice the CPU + bandwidth user A will. For more details refer + Documentation/sched-design-CFS.txt -- regards, Dhaval -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
