Sorry for being late to send.
Making a PAE guest took longer than I expected.
The test was done before "unlikely" annotation was added.
But I did compile-test after adding "unlikely" on x86_32.
Thanks,
Takuya
Test conditions:
On x86_32: PAE/non-PAE Linux guest
On x86_64: Usual 64 guest
PAE guest on x86_32 tracing results:
qemu-system-x86-2042 [000] 5752.176099: funcgraph_entry: | paging64_walk_addr_generic() {
qemu-system-x86-2042 [000] 5752.176100: funcgraph_entry: 0.183 us | get_cr3();
qemu-system-x86-2042 [000] 5752.176101: funcgraph_entry: 0.182 us | get_cr3();
qemu-system-x86-2042 [000] 5752.176102: funcgraph_entry: | load_pdptrs() {
qemu-system-x86-2042 [000] 5752.176103: funcgraph_entry: | kvm_read_guest_page_mmu() {
qemu-system-x86-2042 [000] 5752.176103: funcgraph_entry: 0.171 us | translate_gpa();
qemu-system-x86-2042 [000] 5752.176105: funcgraph_entry: | kvm_read_guest_page() {
qemu-system-x86-2042 [000] 5752.176106: funcgraph_entry: 0.240 us | gfn_to_hva();
qemu-system-x86-2042 [000] 5752.176108: funcgraph_entry: | copy_from_user() {
qemu-system-x86-2042 [000] 5752.176108: funcgraph_entry: | _copy_from_user() {
qemu-system-x86-2042 [000] 5752.176109: funcgraph_entry: 0.178 us | _cond_resched();
qemu-system-x86-2042 [000] 5752.176110: funcgraph_exit: 1.423 us | }
qemu-system-x86-2042 [000] 5752.176111: funcgraph_exit: 2.613 us | }
qemu-system-x86-2042 [000] 5752.176111: funcgraph_exit: 5.148 us | }
qemu-system-x86-2042 [000] 5752.176112: funcgraph_exit: 8.573 us | }
qemu-system-x86-2042 [000] 5752.176112: funcgraph_exit: 9.832 us | }
qemu-system-x86-2042 [000] 5752.176113: funcgraph_entry: 0.181 us | translate_gpa();
qemu-system-x86-2042 [000] 5752.176114: funcgraph_entry: 0.242 us | gfn_to_hva();
qemu-system-x86-2042 [000] 5752.176115: funcgraph_entry: 0.181 us | kvm_is_error_hva();
qemu-system-x86-2042 [000] 5752.176117: funcgraph_entry: 0.182 us | _cond_resched();
qemu-system-x86-2042 [000] 5752.176118: funcgraph_entry: 0.182 us | _cond_resched();
qemu-system-x86-2042 [000] 5752.176119: funcgraph_entry: 0.176 us | translate_gpa();
qemu-system-x86-2042 [000] 5752.176121: funcgraph_entry: 0.242 us | gfn_to_hva();
qemu-system-x86-2042 [000] 5752.176122: funcgraph_entry: 0.181 us | kvm_is_error_hva();
qemu-system-x86-2042 [000] 5752.176123: funcgraph_entry: 0.183 us | _cond_resched();
qemu-system-x86-2042 [000] 5752.176124: funcgraph_entry: 0.182 us | _cond_resched();
qemu-system-x86-2042 [000] 5752.176125: funcgraph_entry: 0.181 us | translate_gpa();
qemu-system-x86-2042 [000] 5752.176127: funcgraph_exit: + 27.102 us | }
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