Messages in this thread | | | Subject | Re: [PATCH 2/2] iommu/amd: Remove performance counter pre-initialization test | From | David Coe <> | Date | Thu, 15 Apr 2021 17:20:31 +0100 |
| |
Hi Suravee!
On 15/04/2021 10:28, Suthikulpanit, Suravee wrote: > David, > > On 4/14/2021 10:33 PM, David Coe wrote: >> Hi Suravee! >> >> I've re-run your revert+update patch on Ubuntu's latest kernel >> 5.11.0-14 partly to check my mailer's 'mangling' hadn't also reached >> the code! >> >> There are 3 sets of results in the attachment, all for the Ryzen >> 2400G. The as-distributed kernel already incorporates your IOMMU RFCv3 >> patch. >> >> A. As-distributed kernel (cold boot) >> >5 retries, so no IOMMU read/write capability, no amd_iommu events. >> >> B. As-distributed kernel (warm boot) >> <5 retries, amd_iommu running stats show large numbers as before. >> >> C. Revert+Update kernel >> amd_iommu events listed and also show large hit/miss numbers. >> >> In due course, I'll load the new (revert+update) kernel on the 4700G >> but won't overload your mail-box unless something unusual turns up. >> >> Best regards, >> > > For the Ryzen 2400G, could you please try with: > - 1 event at a time > - Not more than 8 events (On your system, it has 2 banks x 4 counters/bank. > I am trying to see if this issue might be related to the counters > multiplexing). > > Thanks,
Herewith similar one-at-a-time perf stat results for the Ryzen 4700U. As before, more than 8 events displays the third (%) column and (sometimes) 'silly' numbers in the first column.
-- David $ sudo ./iommu_list.sh
Performance counter stats for 'system wide':
20 amd_iommu_0/cmd_processed/
10.003010666 seconds time elapsed
Performance counter stats for 'system wide':
5 amd_iommu_0/cmd_processed_inv/
10.002349464 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/ign_rd_wr_mmio_1ff8h/
10.002386129 seconds time elapsed
Performance counter stats for 'system wide':
325 amd_iommu_0/int_dte_hit/
10.002346630 seconds time elapsed
Performance counter stats for 'system wide':
2 amd_iommu_0/int_dte_mis/
10.002365656 seconds time elapsed
Performance counter stats for 'system wide':
356 amd_iommu_0/mem_dte_hit/
10.002426866 seconds time elapsed
Performance counter stats for 'system wide':
3,955 amd_iommu_0/mem_dte_mis/
10.002729058 seconds time elapsed
Performance counter stats for 'system wide':
4 amd_iommu_0/mem_iommu_tlb_pde_hit/
10.002422610 seconds time elapsed
Performance counter stats for 'system wide':
1,326 amd_iommu_0/mem_iommu_tlb_pde_mis/
10.002397045 seconds time elapsed
Performance counter stats for 'system wide':
1,009 amd_iommu_0/mem_iommu_tlb_pte_hit/
10.002445347 seconds time elapsed
Performance counter stats for 'system wide':
1,072 amd_iommu_0/mem_iommu_tlb_pte_mis/
10.002414734 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/mem_pass_excl/
10.002435482 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/mem_pass_pretrans/
10.002409956 seconds time elapsed
Performance counter stats for 'system wide':
3,405 amd_iommu_0/mem_pass_untrans/
10.002563812 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/mem_target_abort/
10.002473657 seconds time elapsed
Performance counter stats for 'system wide':
1,311 amd_iommu_0/mem_trans_total/
10.002471787 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/page_tbl_read_gst/
10.002216033 seconds time elapsed
Performance counter stats for 'system wide':
276,609 amd_iommu_0/page_tbl_read_nst/
10.002029261 seconds time elapsed
Performance counter stats for 'system wide':
126,161 amd_iommu_0/page_tbl_read_tot/
10.003569029 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/smi_blk/
10.001871818 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/smi_recv/
10.002212891 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/tlb_inv/
10.002396606 seconds time elapsed
Performance counter stats for 'system wide':
0 amd_iommu_0/vapic_int_guest/
10.002435308 seconds time elapsed
Performance counter stats for 'system wide':
340 amd_iommu_0/vapic_int_non_guest/
10.002405868 seconds time elapsed
$ sudo perf stat -e '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/' sleep 10
Performance counter stats for 'system wide':
345 amd_iommu_0/mem_dte_hit/ 606 amd_iommu_0/mem_dte_mis/ 10 amd_iommu_0/mem_iommu_tlb_pde_hit/ 910 amd_iommu_0/mem_iommu_tlb_pde_mis/ 140 amd_iommu_0/mem_iommu_tlb_pte_hit/ 797 amd_iommu_0/mem_iommu_tlb_pte_mis/
10.002553966 seconds time elapsed
$ sudo perf stat -e '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/' sleep 10
Performance counter stats for 'system wide':
340 amd_iommu_0/mem_dte_hit/ (72.65%) 389 amd_iommu_0/mem_dte_mis/ (72.67%) 8 amd_iommu_0/mem_iommu_tlb_pde_hit/ (72.71%) 849 amd_iommu_0/mem_iommu_tlb_pde_mis/ (72.76%) 96 amd_iommu_0/mem_iommu_tlb_pte_hit/ (72.78%) 742 amd_iommu_0/mem_iommu_tlb_pte_mis/ (72.75%) 0 amd_iommu_0/mem_pass_excl/ (72.76%) 0 amd_iommu_0/mem_pass_pretrans/ (72.76%) 6 amd_iommu_0/mem_pass_untrans/ (72.77%) 0 amd_iommu_0/mem_target_abort/ (72.71%) 1,122 amd_iommu_0/mem_trans_total/ (72.69%)
10.002471480 seconds time elapsed
| |