diff options
| author | David Matlack <dmatlack@google.com> | 2021-08-04 22:28:41 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-06 07:52:29 -0400 |
| commit | 081de470f1e6e83f9f460ba5ae8f57ff07f37692 (patch) | |
| tree | 3ad12a78c1acc8cee41b9f2af9ab08eb27661152 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | fe22ed827c5b60b895b15c5c3f04e04ac606be38 (diff) | |
KVM: x86/mmu: Leverage vcpu->last_used_slot in tdp_mmu_map_handle_target_level
The existing TDP MMU methods to handle dirty logging are vcpu-agnostic
since they can be driven by MMU notifiers and other non-vcpu-specific
events in addition to page faults. However this means that the TDP MMU
is not benefiting from the new vcpu->last_used_slot. Fix that by
introducing a tdp_mmu_map_set_spte_atomic() which is only called during
a TDP page fault and has access to the kvm_vcpu for fast slot lookups.
This improves "Populate memory time" in dirty_log_perf_test by 5%:
Command | Before | After
------------------------------- | ---------------- | -------------
./dirty_log_perf_test -v64 -x64 | 5.472321072s | 5.169832886s
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20210804222844.1419481-5-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions