[PW_SID:1095468] riscv: lib: add optimized memcmp() and extend KUnit tests by linux-riscv-bot · Pull Request #1948 · linux-riscv/linux

linux-riscv-bot · 2026-05-15T14:53:03Z

PR for series 1095468 applied to workflow__riscv__fixes

Name: riscv: lib: add optimized memcmp() and extend KUnit tests
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1095468
Version: 3

Add an assembly implementation of memcmp() for RISC-V. The implementation uses the ZBB extension for word-at-a-time comparison and an assembly fallback for non-ZBB systems. Benchmark results (QEMU TCG, rv64, Aligned): Len | Default | NoZBB | ZBB | %NoZBB | %ZBB ------|---------|--------|--------|--------|------- 1 B | 20.3 | 25.0 | 20.9 | +23.2% | +3.0% 7 B | 88.9 | 107.5 | 155.7 | +20.9% | +75.1% 8 B | 89.6 | 110.9 | 176.2 | +23.8% | +96.7% 16 B | 134.4 | 172.4 | 334.8 | +28.3% | +149.1% 31 B | 163.5 | 220.5 | 606.2 | +34.9% | +270.8% 64 B | 203.8 | 235.9 | 968.6 | +15.8% | +375.3% 127 B | 224.6 | 268.7 | 1362.8 | +19.6% | +506.8% 512 B | 235.7 | 271.1 | 1913.7 | +15.0% | +711.9% 1024 B| 256.8 | 290.6 | 2123.6 | +13.2% | +726.9% 4096 B| 263.8 | 302.9 | 2290.4 | +14.8% | +768.2% Benchmark results (QEMU TCG, rv64, Unaligned - Offset 3): Len | Default | NoZBB | ZBB | %NoZBB | %ZBB ------|---------|--------|--------|--------|------- 1 B | 20.7 | 21.7 | 21.5 | +4.8% | +3.9% 7 B | 96.2 | 99.1 | 96.9 | +3.0% | +0.7% 8 B | 97.5 | 118.5 | 110.5 | +21.5% | +13.3% 16 B | 136.7 | 166.6 | 172.8 | +21.9% | +26.4% 31 B | 167.6 | 206.5 | 211.9 | +23.2% | +26.4% 64 B | 204.4 | 229.9 | 240.3 | +12.5% | +17.6% 127 B | 229.6 | 261.7 | 269.0 | +14.0% | +17.2% 512 B | 245.5 | 260.8 | 269.9 | +6.2% | +9.9% 1024 B| 246.9 | 261.2 | 283.5 | +5.8% | +14.8% 4096 B| 250.7 | 295.8 | 299.7 | +18.0% | +19.5% Signed-off-by: Milan Tripkovic <Milan.Tripkovic@rt-rk.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

Extend the string benchmarking suite to include memcmp(). Extend the string unit test to include memcmp(). Signed-off-by: Milan Tripkovic <Milan.Tripkovic@rt-rk.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

linux-riscv-bot · 2026-05-15T14:59:03Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 139.55 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T15:36:03Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 2217.81 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:26:49Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 3044.65 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:27:16Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 25.59 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:27:44Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 26.75 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:27:49Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 2.65 seconds
Result: WARNING
Output:

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#76: 
new file mode 100644

total: 0 errors, 1 warnings, 0 checks, 156 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 94f7258d561c ("riscv: lib: add memcmp() implementation") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 1 warnings, 0 checks, 156 lines checked
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?

linux-riscv-bot · 2026-05-15T16:29:17Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 86.68 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:29:19Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:29:21Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
kdoc
Desc: Detects for kdoc errors
Duration: 0.86 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:29:23Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
module-param
Desc: Detect module_param changes
Duration: 0.26 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:29:25Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.23 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:29:27Z

Patch 1: "[v3,1/2] riscv: lib: add memcmp() implementation"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.29 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:31:59Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 137.35 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T16:49:21Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1039.31 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:13:05Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1422.59 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:13:32Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 25.67 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:14:01Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 27.11 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:14:04Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 0.86 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:15:32Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 86.30 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:15:34Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:15:36Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
kdoc
Desc: Detects for kdoc errors
Duration: 0.88 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:15:38Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
module-param
Desc: Detect module_param changes
Duration: 0.27 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:15:40Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-05-15T17:15:42Z

Patch 2: "[v3,2/2] lib/string_kunit: extend benchmarks and unit test to memcmp()"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.31 seconds
Result: PASS

MilanTripkovic02 added 2 commits May 15, 2026 14:53

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