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| author |   Alexandre Ghiti <alexghiti@rivosinc.com> | 2023-10-30 14:30:27 +0100 |
|---|---|---|
| committer |   Palmer Dabbelt <palmer@rivosinc.com> | 2023-11-06 22:49:21 -0800 |
| commit | ba6f35964c518b4520bc3f2fe25d8457cb4a7be5 (patch) | |
| tree | 8a226c57168141fb4684e6f32aa451326a1e7bca /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | riscv: Improve flush_tlb_range() for hugetlb pages (diff) | |
| download | wireguard-linux-ba6f35964c518b4520bc3f2fe25d8457cb4a7be5.tar.xz wireguard-linux-ba6f35964c518b4520bc3f2fe25d8457cb4a7be5.zip | |
riscv: Make __flush_tlb_range() loop over pte instead of flushing the whole tlb
Currently, when the range to flush covers more than one page (a 4K page or
a hugepage), __flush_tlb_range() flushes the whole tlb. Flushing the whole
tlb comes with a greater cost than flushing a single entry so we should
flush single entries up to a certain threshold so that:
threshold * cost of flushing a single entry < cost of flushing the whole
tlb.
Co-developed-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # On RZ/Five SMARC
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Tested-by: Samuel Holland <samuel.holland@sifive.com>
Link: https://lore.kernel.org/r/20231030133027.19542-4-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions