Perf event support for guest VM is added here, and the below is the
example:
perf kvm --host --guest --guestkallsyms=guest-kallsyms
--guestmodules=guest-modules top
Overhead Shared Object Symbol
20.02% [guest.kernel] [g] __arch_cpu_idle
16.74% [guest.kernel] [g] queued_spin_lock_slowpath
10.05% [kernel] [k] __arch_cpu_idle
2.00% [guest.kernel] [g] clear_page
1.62% [guest.kernel] [g] copy_page
1.50% [guest.kernel] [g] next_uptodate_folio
1.41% [guest.kernel] [g] queued_write_lock_slowpath
1.41% [guest.kernel] [g] unmap_page_range
1.36% [guest.kernel] [g] mod_objcg_state
1.30% [guest.kernel] [g] osq_lock
1.28% [guest.kernel] [g] __slab_free
0.98% [guest.kernel] [g] copy_page_range
Bibo Mao (3):
LoongArch: KVM: Add stub for kvm_arch_vcpu_preempted_in_kernel
LoongArch: KVM: Implement arch specified functions for guest perf
LoongArch: KVM: Register perf callback for guest
arch/loongarch/include/asm/kvm_host.h | 2 ++
arch/loongarch/kvm/Kconfig | 1 +
arch/loongarch/kvm/main.c | 2 ++
arch/loongarch/kvm/vcpu.c | 31 +++++++++++++++++++++++++++
4 files changed, 36 insertions(+)
base-commit: 2408a807bfc3f738850ef5ad5e3fd59d66168996
--
2.39.3
