On Mon, Jul 19, 2021 at 05:14:28PM +0100, John Garry wrote:

On 09/07/2021 15:24, Ming Lei wrote:

quoted

quoted

associated compromises.

Follows the log of 'perf report'

1) good(run fio from cpus in the nvme's numa node)

Hi Ming,

If you're still interested in this issue, as an experiment only you can try
my rebased patches here:

https://github.com/hisilicon/kernel-dev/commits/private-topic-smmu-5.14-cmdq-4

I think that you should see a significant performance boost.

There is build issue, please check your tree:

  MODPOST vmlinux.symvers
  MODINFO modules.builtin.modinfo
  GEN     modules.builtin
  LD      .tmp_vmlinux.btf
ld: Unexpected GOT/PLT entries detected!
ld: Unexpected run-time procedure linkages detected!
ld: drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.o: in function `smmu_test_store':
/root/git/linux/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:3892: undefined reference to `smmu_test_core'
  BTF     .btf.vmlinux.bin.o
pahole: .tmp_vmlinux.btf: No such file or directory
  LD      .tmp_vmlinux.kallsyms1
.btf.vmlinux.bin.o: file not recognized: file format not recognized
make: *** [Makefile:1177: vmlinux] Error 1


Thanks, 
Ming


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