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
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