Hi ! I am trying to use qemu monitor info tlb But when i enter ctrl+a+c ,and then enter info tlb , i don't find info tlb option in the monitors list given below.

(qemu) info tlb
info balloon -- show balloon information
info block -- show the block devices
info blockstats -- show block device statistics
info capture -- show capture information
info chardev -- show the character devices
info cpus -- show infos for each CPU
info history -- show the command line history
info irq -- show the interrupts statistics (if available)
info jit -- show dynamic compiler info
info kvm -- show KVM information
info mice -- show which guest mouse is receiving events
info migrate -- show migration status
info mtree -- show memory tree
info name -- show the current VM name
info network -- show the network state
info numa -- show NUMA information
info pci -- show PCI info
info pcmcia -- show guest PCMCIA status
info pic -- show i8259 (PIC) state
info profile -- show profiling information
info qdm -- show qdev device model list
info qtree -- show device tree
info registers -- show the cpu registers
info roms -- show roms
info snapshots -- show the currently saved VM snapshots
info status -- show the current VM status (running|paused)
info trace-events -- show available trace-events & their state
info usb -- show guest USB devices
info usbhost -- show host USB devices
info usernet -- show user network stack connection states
info uuid -- show the current VM UUID
info version -- show the version of QEMU
info vnc -- show the vnc server status

You can see , no info tlb option in it.So, what should i do to see tlb??

My guess is that the version you have doesn't have that in it? Guess that the host could have something to do with it but unlikely.

But jefro ! *info tlb* along with the other monitors is already defined in the files
host/hmp-commands.hx
host/qemu-monitor.texi

but even then Qemu is not showing *info tlb*.So, I don't think that would be the case of different version.