On Thu, Sep 19, 2024 at 3:15 AM Max Chou <max.c...@sifive.com> wrote: > > Hi, > > This version fixes several issues in v5 > - The cross page bound checking issue > - The mismatch vl comparison in the early exit checking of vext_ldst_us > - The endian issue when host is big endian > > Thank for Richard Henderson's suggestions that this version unrolled the > loop in helper functions of unmasked vector unit-stride load/store > instructions, etc. > > And this version also extends the optimizations to the unmasked vector > fault-only-first load instruction. > > Some performance result of this version > 1. Test case provided in > https://gitlab.com/qemu-project/qemu/-/issues/2137#note_1757501369 > - QEMU user mode (vlen=128): > - Original: ~11.8 sec > - v5: ~1.3 sec > - v6: ~1.2 sec > - QEMU system mode (vlen=128): > - Original: ~29.4 sec > - v5: ~1.6 sec > - v6: ~1.6 sec > 2. SPEC CPU2006 INT (test input) > - QEMU user mode (vlen=128) > - Original: ~459.1 sec > - v5: ~300.0 sec > - v6: ~280.6 sec > 3. SPEC CPU2017 intspeed (test input) > - QEMU user mode (vlen=128) > - Original: ~2475.9 sec > - v5: ~1702.6 sec > - v6: ~1663.4 sec > > > This version is based on the riscv-to-apply.next branch(commit 90d5d3c). > > Changes from v5: > - patch 2 > - Replace the VSTART_CHECK_EARLY_EXIT function by checking the > correct evl in vext_ldst_us. > - patch 3 > - Unroll the memory load/store loop > - Fix the bound checking issue in cross page elements > - Fix the endian issue in GEN_VEXT_LD_ELEM/GEN_VEXT_ST_ELEM > - Pass in mmu_index for vext_page_ldst_us > - Reduce the flag & host checking > - patch 4 > - Unroll the memory load/store loop > - Fix the bound checking issue in cross page elements > - patch 5 > - Extend optimizations to unmasked vector fault-only-first load > instruction > - patch 6 > - Switch to memcpy only when doing byte load/store > - patch 7 > - Inline the vext_page_ldst_us function > > Previous versions: > - v1: https://lore.kernel.org/all/20240215192823.729209-1-max.c...@sifive.com/ > - v2: https://lore.kernel.org/all/20240531174504.281461-1-max.c...@sifive.com/ > - v3: > https://lore.kernel.org/all/20240613141906.1276105-1-max.c...@sifive.com/ > - v4: > https://lore.kernel.org/all/20240613175122.1299212-1-max.c...@sifive.com/ > - v5: https://lore.kernel.org/all/20240717133936.713642-1-max.c...@sifive.com/ > > Max Chou (7): > target/riscv: Set vdata.vm field for vector load/store whole register > instructions > target/riscv: rvv: Replace VSTART_CHECK_EARLY_EXIT in vext_ldst_us > target/riscv: rvv: Provide a fast path using direct access to host ram > for unmasked unit-stride load/store > target/riscv: rvv: Provide a fast path using direct access to host ram > for unit-stride whole register load/store > target/riscv: rvv: Provide a fast path using direct access to host ram > for unit-stride load-only-first load instructions > target/riscv: rvv: Provide group continuous ld/st flow for unit-stride > ld/st instructions > target/riscv: Inline unit-stride ld/st and corresponding functions for > performance
Thanks! Applied to riscv-to-apply.next Alistair > > target/riscv/insn_trans/trans_rvv.c.inc | 3 + > target/riscv/vector_helper.c | 598 ++++++++++++++++-------- > 2 files changed, 400 insertions(+), 201 deletions(-) > > -- > 2.34.1 > >
