Synnefo » snf-ganeti

-- * Cpu pinning separators and constants

cpuPinningSep :: String

cpuPinningSep = ":"

cpuPinningAll :: String

cpuPinningAll = "all"

-- | Internal representation of "all"

cpuPinningAllVal :: Int

cpuPinningAllVal = -1

-- | One "all" entry in a CPU list means CPU pinning is off

cpuPinningOff :: [Int]

cpuPinningOff = [cpuPinningAllVal]

-- | A Xen-specific implementation detail is that there is no way to

-- actually say "use any cpu for pinning" in a Xen configuration file,

-- as opposed to the command line, where you can say

-- @

-- xm vcpu-pin <domain> <vcpu> all

-- @

--

-- The workaround used in Xen is "0-63" (see source code function

-- "xm_vcpu_pin" in @<xen-source>/tools/python/xen/xm/main.py@).

--

-- To support future changes, the following constant is treated as a

-- blackbox string that simply means "use any cpu for pinning under

-- xen".

cpuPinningAllXen :: String

cpuPinningAllXen = "0-63"

-- | A KVM-specific implementation detail - the following value is

-- used to set CPU affinity to all processors (--0 through --31), per

-- taskset man page.

--

-- FIXME: This only works for machines with up to 32 CPU cores

cpuPinningAllKvm :: Int

cpuPinningAllKvm = 0xFFFFFFFF