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runtime: Add heuristic to get the right value(s) for mem-reserve

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Fixes: #2938

Signed-off-by: Zvonko Kaiser <zkaiser@nvidia.com>
This commit is contained in:
Zvonko Kaiser
2022-05-31 13:48:06 -07:00
parent 6fd40085ef
commit e7e7dc9dfe
15 changed files with 1480 additions and 5 deletions
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42
src/runtime/virtcontainers/qemu_arch_base.go
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@@ -18,6 +18,7 @@ import (
"strings"
govmmQemu "github.com/kata-containers/kata-containers/src/runtime/pkg/govmm/qemu"
"gitlab.com/nvidia/cloud-native/go-nvlib/pkg/nvpci"
"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
@@ -138,7 +139,7 @@ type qemuArch interface {
setIgnoreSharedMemoryMigrationCaps(context.Context, *govmmQemu.QMP) error
// appendPCIeRootPortDevice appends a pcie-root-port device to pcie.0 bus
appendPCIeRootPortDevice(devices []govmmQemu.Device, number uint32) []govmmQemu.Device
appendPCIeRootPortDevice(devices []govmmQemu.Device, number uint32, memSize32bit uint64, memSize64bit uint64) []govmmQemu.Device
// append vIOMMU device
appendIOMMU(devices []govmmQemu.Device) ([]govmmQemu.Device, error)
@@ -151,6 +152,10 @@ type qemuArch interface {
// a firmware, returns a string containing the path to the firmware that should
// be used with the -bios option, ommit -bios option if the path is empty.
appendProtectionDevice(devices []govmmQemu.Device, firmware, firmwareVolume string) ([]govmmQemu.Device, string, error)
// scans the PCIe space and returns the biggest BAR sizes for 32-bit
// and 64-bit addressable memory
getBARsMaxAddressableMemory() (uint64, uint64)
}
type qemuArchBase struct {
@@ -787,8 +792,39 @@ func (q *qemuArchBase) addBridge(b types.Bridge) {
}
// appendPCIeRootPortDevice appends to devices the given pcie-root-port
func (q *qemuArchBase) appendPCIeRootPortDevice(devices []govmmQemu.Device, number uint32) []govmmQemu.Device {
return genericAppendPCIeRootPort(devices, number, q.qemuMachine.Type)
func (q *qemuArchBase) appendPCIeRootPortDevice(devices []govmmQemu.Device, number uint32, memSize32bit uint64, memSize64bit uint64) []govmmQemu.Device {
return genericAppendPCIeRootPort(devices, number, q.qemuMachine.Type, memSize32bit, memSize64bit)
}
func (q *qemuArchBase) getBARsMaxAddressableMemory() (uint64, uint64) {
pci := nvpci.New()
devs, _ := pci.GetAllDevices()
// Since we do not know which devices are going to be hotplugged,
// we're going to use the GPU with the biggest BARs to initialize the
// root port, this should work for all other devices as well.
// defaults are 2MB for both, if no suitable devices found
max32bit := uint64(2 * 1024 * 1024)
max64bit := uint64(2 * 1024 * 1024)
for _, dev := range devs {
if !dev.IsGPU() {
continue
}
memSize32bit, memSize64bit := dev.Resources.GetTotalAddressableMemory(true)
if max32bit < memSize32bit {
max32bit = memSize32bit
}
if max64bit < memSize64bit {
max64bit = memSize64bit
}
}
// The actual 32bit is most of the time a power of 2 but we need some
// buffer so double that to leave space for other IO functions.
// The 64bit size is not a power of 2 and hence is already rounded up
// to the higher value.
return max32bit * 2, max64bit
}
// appendIOMMU appends a virtual IOMMU device