Messages in this thread | | | Subject | Re: [PATCH 2/2] iommu/amd: Remove performance counter pre-initialization test | From | David Coe <> | Date | Sat, 10 Apr 2021 09:17:31 +0100 |
| |
Well, well! This is a promising start to the weekend. Thank you both, Suravee and Paul.
Results for AMD Ryzen 4 2400G running Ubuntu 21.04β kernel 5.11.0-13 and Windows 10 2H2 under KVM
$ sudo dmesg | grep IOMMU [ 0.557725] pci 0000:00:00.2: AMD-Vi: IOMMU performance counters supported [ 0.561538] pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40 [ 0.562828] perf/amd_iommu: Detected AMD IOMMU #0 (2 banks, 4 counters/bank). [ 0.881108] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de>
$ systool -m kvm_amd -v Module = "kvm_amd"
Attributes: coresize = "114688" initsize = "0" initstate = "live" refcnt = "0" srcversion = "4371BA17A41823101F90761" taint = "" uevent = <store method only>
Parameters: avic = "0" dump_invalid_vmcb = "N" nested = "1" npt = "1" nrips = "1" pause_filter_count_grow= "2" pause_filter_count_max= "65535" pause_filter_count_shrink= "0" pause_filter_count = "3000" pause_filter_thresh = "128" sev_es = "0" sev = "0" vgif = "1" vls = "1"
Sections:
$ compgen -G "/sys/kernel/iommu_groups/*/devices/*" /sys/kernel/iommu_groups/9/devices/0000:09:00.0 /sys/kernel/iommu_groups/0/devices/0000:00:01.0 /sys/kernel/iommu_groups/10/devices/0000:0a:00.0 /sys/kernel/iommu_groups/2/devices/0000:00:01.6 /sys/kernel/iommu_groups/12/devices/0000:0b:00.0 /sys/kernel/iommu_groups/4/devices/0000:00:08.1 /sys/kernel/iommu_groups/6/devices/0000:00:14.0 /sys/kernel/iommu_groups/6/devices/0000:00:14.3 /sys/kernel/iommu_groups/8/devices/0000:02:04.0 /sys/kernel/iommu_groups/8/devices/0000:02:01.0 /sys/kernel/iommu_groups/8/devices/0000:04:00.0 /sys/kernel/iommu_groups/8/devices/0000:01:00.1 /sys/kernel/iommu_groups/8/devices/0000:02:06.0 /sys/kernel/iommu_groups/8/devices/0000:01:00.0 /sys/kernel/iommu_groups/8/devices/0000:01:00.2 /sys/kernel/iommu_groups/8/devices/0000:08:00.0 /sys/kernel/iommu_groups/8/devices/0000:02:00.0 /sys/kernel/iommu_groups/8/devices/0000:02:07.0 /sys/kernel/iommu_groups/8/devices/0000:03:00.0 /sys/kernel/iommu_groups/1/devices/0000:00:01.2 /sys/kernel/iommu_groups/11/devices/0000:0a:00.1 /sys/kernel/iommu_groups/11/devices/0000:0a:00.3 /sys/kernel/iommu_groups/11/devices/0000:0a:00.2 /sys/kernel/iommu_groups/11/devices/0000:0a:00.4 /sys/kernel/iommu_groups/11/devices/0000:0a:00.6 /sys/kernel/iommu_groups/3/devices/0000:00:08.0 /sys/kernel/iommu_groups/5/devices/0000:00:08.2 /sys/kernel/iommu_groups/7/devices/0000:00:18.5 /sys/kernel/iommu_groups/7/devices/0000:00:18.7 /sys/kernel/iommu_groups/7/devices/0000:00:18.0 /sys/kernel/iommu_groups/7/devices/0000:00:18.2 /sys/kernel/iommu_groups/7/devices/0000:00:18.4 /sys/kernel/iommu_groups/7/devices/0000:00:18.6 /sys/kernel/iommu_groups/7/devices/0000:00:18.1 /sys/kernel/iommu_groups/7/devices/0000:00:18.3
$ sudo kvm-ok INFO: /dev/kvm exists KVM acceleration can be used
$ sudo perf stat -e 'amd_iommu_0/cmd_processed/, amd_iommu_0/cmd_processed_inv/, amd_iommu_0/ign_rd_wr_mmio_1ff8h/, amd_iommu_0/int_dte_hit/, amd_iommu_0/int_dte_mis/, amd_iommu_0/mem_dte_hit/, amd_iommu_0/mem_dte_mis/, amd_iommu_0/mem_iommu_tlb_pde_hit/, amd_iommu_0/mem_iommu_tlb_pde_mis/, amd_iommu_0/mem_iommu_tlb_pte_hit/, amd_iommu_0/mem_iommu_tlb_pte_mis/, amd_iommu_0/mem_pass_excl/, amd_iommu_0/mem_pass_pretrans/, amd_iommu_0/mem_pass_untrans/, amd_iommu_0/mem_target_abort/, amd_iommu_0/mem_trans_total/, amd_iommu_0/page_tbl_read_gst/, amd_iommu_0/page_tbl_read_nst/, amd_iommu_0/page_tbl_read_tot/, amd_iommu_0/smi_blk/, amd_iommu_0/smi_recv/, amd_iommu_0/tlb_inv/, amd_iommu_0/vapic_int_guest/, amd_iommu_0/vapic_int_non_guest/' sleep 10
Performance counter stats for 'system wide':
0 amd_iommu_0/cmd_processed/ (33.32%) 2 amd_iommu_0/cmd_processed_inv/ (33.35%) 0 amd_iommu_0/ign_rd_wr_mmio_1ff8h/ (33.39%) 340 amd_iommu_0/int_dte_hit/ (33.43%) 23 amd_iommu_0/int_dte_mis/ (33.44%) 556 amd_iommu_0/mem_dte_hit/ (33.44%) 841,689,151,202,939 amd_iommu_0/mem_dte_mis/ (33.44%) 74 amd_iommu_0/mem_iommu_tlb_pde_hit/ (33.44%) 502 amd_iommu_0/mem_iommu_tlb_pde_mis/ (33.41%) 1,195 amd_iommu_0/mem_iommu_tlb_pte_hit/ (33.36%) 8,017 amd_iommu_0/mem_iommu_tlb_pte_mis/ (33.33%) 0 amd_iommu_0/mem_pass_excl/ (33.29%) 0 amd_iommu_0/mem_pass_pretrans/ (33.28%) 16,504 amd_iommu_0/mem_pass_untrans/ (33.28%) 0 amd_iommu_0/mem_target_abort/ (33.28%) 2,842 amd_iommu_0/mem_trans_total/ (33.28%) 0 amd_iommu_0/page_tbl_read_gst/ (33.28%) 111 amd_iommu_0/page_tbl_read_nst/ (33.29%) 111 amd_iommu_0/page_tbl_read_tot/ (33.28%) 0 amd_iommu_0/smi_blk/ (33.28%) 0 amd_iommu_0/smi_recv/ (33.29%) 0 amd_iommu_0/tlb_inv/ (33.28%) 0 amd_iommu_0/vapic_int_guest/ (33.28%) 345 amd_iommu_0/vapic_int_non_guest/ (33.29%)
10.000799128 seconds time elapsed
Results for Ryzen 7 4700U to follow.
-- David Coe
| |