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HADOOP-19849. [RISC-V] Add rv64 Zbc (CLMUL) bulk CRC32C acceleration#8371

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HADOOP-19849. [RISC-V] Add rv64 Zbc (CLMUL) bulk CRC32C acceleration#8371
PeterPtroc wants to merge 1 commit intoapache:trunkfrom
PeterPtroc:HADOOP-19849

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@PeterPtroc PeterPtroc commented Mar 23, 2026

Description of PR

Before introducing RVV optimizations for CRC32, it is useful to first close the optimization gap for CRC32C on Zbc. This change addresses that prerequisite and helps establish a cleaner baseline for subsequent RVV-focused tuning work.

The following summarizes the work included in this commit.

  • Adds a riscv64 native CRC32C acceleration path using Zbc CLMUL in the existing bulk CRC implementation.
  • Adds CRC32C bitwise fallback for small/misaligned data and pipelined CRC32C processing for larger blocks.
  • Hooks the CRC32C function pointer at runtime when Zbc is detected on linux-riscv64.
  • Keeps existing CRC32 (zlib) behavior unchanged.

For small chunks (bpc <= 32), throughput regresses; for medium/large chunks (bpc >= 256), throughput improves significantly.

bpc #T NativeC (origin) NativeC (new) Delta (MB/s) Delta%
32 1 695.1 70.4 -624.7 -89.9%
32 2 699.4 70.3 -629.1 -89.9%
32 4 701.0 70.5 -630.5 -89.9%
32 8 682.8 70.4 -612.4 -89.7%
32 16 690.6 70.3 -620.3 -89.8%
64 1 830.0 717.7 -112.3 -13.5%
64 2 791.0 751.1 -39.9 -5.0%
64 4 817.0 738.5 -78.5 -9.6%
64 8 813.1 752.7 -60.4 -7.4%
64 16 807.9 746.5 -61.4 -7.6%
128 1 921.8 679.0 -242.8 -26.3%
128 2 865.5 627.4 -238.1 -27.5%
128 4 902.6 693.3 -209.3 -23.2%
128 8 916.8 698.0 -218.8 -23.9%
128 16 895.2 672.9 -222.3 -24.8%
256 1 872.0 2982.3 +2110.3 +242.0%
256 2 756.8 3023.4 +2266.6 +299.5%
256 4 879.4 2518.3 +1638.9 +186.4%
256 8 847.2 2529.9 +1682.7 +198.6%
256 16 892.8 2518.4 +1625.6 +182.1%
512 1 969.1 3698.0 +2728.9 +281.6%
512 2 988.9 3737.5 +2748.6 +277.9%
512 4 955.8 2996.8 +2041.0 +213.5%
512 8 936.1 2645.3 +1709.2 +182.6%
512 16 952.3 3002.4 +2050.1 +215.3%
1024 1 1006.7 3596.7 +2590.0 +257.3%
1024 2 947.1 3588.8 +2641.7 +278.9%
1024 4 1001.0 3025.9 +2024.9 +202.3%
1024 8 980.3 2751.4 +1771.1 +180.7%
1024 16 982.2 3027.8 +2045.6 +208.3%
2048 1 1015.5 3529.7 +2514.2 +247.6%
2048 2 1033.3 3575.9 +2542.6 +246.1%
2048 4 1016.1 3070.5 +2054.4 +202.2%
2048 8 1006.1 2819.4 +1813.3 +180.2%
2048 16 991.3 3056.3 +2065.0 +208.3%
4096 1 1029.0 4485.6 +3456.6 +335.9%
4096 2 1026.8 4562.3 +3535.5 +344.3%
4096 4 1005.9 3617.4 +2611.5 +259.6%
4096 8 1006.4 3634.1 +2627.7 +261.1%
4096 16 1015.6 3630.8 +2615.2 +257.5%
8192 1 1032.9 5100.4 +4067.5 +393.8%
8192 2 1043.6 5057.9 +4014.3 +384.7%
8192 4 1025.3 3954.0 +2928.7 +285.6%
8192 8 1024.9 3415.2 +2390.3 +233.2%
8192 16 1007.1 3899.5 +2892.4 +287.2%
16384 1 1034.7 5706.5 +4671.8 +451.5%
16384 2 1045.7 5694.4 +4648.7 +444.6%
16384 4 1012.9 4325.6 +3312.7 +327.1%
16384 8 1036.8 4261.1 +3224.3 +311.0%
16384 16 1011.5 4556.3 +3544.8 +350.4%
32768 1 1037.7 6255.9 +5218.2 +502.9%
32768 2 975.2 6236.5 +5261.3 +539.5%
32768 4 1030.5 4543.7 +3513.2 +340.9%
32768 8 1007.3 4311.6 +3304.3 +328.0%
32768 16 1010.7 4823.0 +3812.3 +377.2%
65536 1 1037.5 6060.3 +5022.8 +484.1%
65536 2 974.2 6235.9 +5261.7 +540.1%
65536 4 1001.4 4620.2 +3618.8 +361.4%
65536 8 1007.5 4624.2 +3616.7 +359.0%
65536 16 1011.0 4091.1 +3080.1 +304.7%

How was this patch tested?

Built hadoop-common with native profile on riscv64; verified functionality with TestNativeCrc32.
Ran Hadoop's CRC benchmark on riscv64 with JDK 17.

Summary:

  • Unit/native tests: pass (Tests run: 22, Failures: 0, Errors: 0, Skipped: 0)
  • Build: success

Command:

mvn -Pnative \
  -Dtest=org.apache.hadoop.util.TestNativeCrc32 \
  -Djava.library.path="$HADOOP_COMMON_LIB_NATIVE_DIR" \
  test

Results:

[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.apache.hadoop.util.TestNativeCrc32
[INFO] Tests run: 22, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.725 s -- in org.apache.hadoop.util.TestNativeCrc32
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 22, Failures: 0, Errors: 0, Skipped: 0
[INFO] 
[INFO] 
[INFO] Executed tasks
[INFO] 
[INFO] --- hadoop-maven-plugins:3.6.0-SNAPSHOT:cmake-test (test_bulk_crc32) @ hadoop-common ---
[INFO] 
[INFO] --- hadoop-maven-plugins:3.6.0-SNAPSHOT:cmake-test (erasure_code_test) @ hadoop-common ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

Command:

export HADOOP_COMMON_LIB_NATIVE_DIR="$PWD/hadoop-common-project/hadoop-common/target/native/target/usr/local/lib"

export LD_LIBRARY_PATH="$HADOOP_COMMON_LIB_NATIVE_DIR:$LD_LIBRARY_PATH"

mvn -Pnative -DskipTests -Dexec.classpathScope=test \
-Dexec.mainClass=org.apache.hadoop.util.Crc32PerformanceTest \
-Djava.library.path="$HADOOP_COMMON_LIB_NATIVE_DIR" exec:java

Results (Origin)

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Detecting the operating system and CPU architecture
[INFO] ------------------------------------------------------------------------
[INFO] os.detected.name: linux
[INFO] os.detected.arch: riscv64
[INFO] os.detected.bitness: 64
[INFO] os.detected.version: 6.12
[INFO] os.detected.version.major: 6
[INFO] os.detected.version.minor: 12
[INFO] os.detected.release: PolyOS
[INFO] os.detected.release.version: 24.03
[INFO] os.detected.release.like.PolyOS: true
[INFO] os.detected.classifier: linux-riscv64
[INFO] 
[INFO] ------------------< org.apache.hadoop:hadoop-common >-------------------
[INFO] Building Apache Hadoop Common 3.6.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- exec-maven-plugin:1.3.1:java (default-cli) @ hadoop-common ---
[WARNING] Warning: killAfter is now deprecated. Do you need it ? Please comment on MEXEC-6.
                 java.version = 17.0.11
            java.runtime.name = OpenJDK Runtime Environment
         java.runtime.version = 17.0.11+9
              java.vm.version = 17.0.11+9
               java.vm.vendor = BiSheng
                 java.vm.name = OpenJDK 64-Bit Server VM
java.vm.specification.version = 17
   java.specification.version = 17
                      os.arch = riscv64
                      os.name = Linux
                   os.version = 6.12.74-0.0.0.0.riscv64
Data Length = 64 MB
Trials      = 5

Direct Buffer Performance Table (bpc: byte-per-crc in MB/sec; #T: #Theads)
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|    32 |  1 |      49.2 |     158.2 | 221.4% |     183.7 |  16.1% |      179.7 |  -2.2% |     504.4 | 180.6% |     695.1 |  37.8% |
|    32 |  2 |      50.1 |     159.0 | 217.2% |     186.1 |  17.1% |      183.6 |  -1.3% |     527.4 | 187.3% |     699.4 |  32.6% |
|    32 |  4 |      45.4 |     137.5 | 202.8% |     159.9 |  16.3% |      157.6 |  -1.4% |     509.8 | 223.3% |     701.0 |  37.5% |
|    32 |  8 |      44.7 |     126.4 | 182.7% |     157.0 |  24.2% |      138.3 | -11.9% |     506.7 | 266.3% |     682.8 |  34.7% |
|    32 | 16 |      40.5 |     130.7 | 222.9% |     148.7 |  13.7% |      148.8 |   0.1% |     516.0 | 246.7% |     690.6 |  33.8% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|    64 |  1 |      92.4 |     266.5 | 188.4% |     293.6 |  10.2% |      293.9 |   0.1% |     295.7 |   0.6% |     830.0 | 180.7% |
|    64 |  2 |      91.2 |     265.3 | 190.8% |     288.4 |   8.7% |      286.4 |  -0.7% |     294.8 |   3.0% |     791.0 | 168.3% |
|    64 |  4 |      86.6 |     264.1 | 204.8% |     274.2 |   3.8% |      275.8 |   0.6% |     287.5 |   4.2% |     817.0 | 184.2% |
|    64 |  8 |      82.9 |     237.5 | 186.5% |     258.5 |   8.8% |      267.2 |   3.4% |     294.7 |  10.3% |     813.1 | 175.9% |
|    64 | 16 |      79.9 |     195.1 | 144.2% |     234.5 |  20.2% |      240.7 |   2.7% |     295.0 |  22.5% |     807.9 | 173.9% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   128 |  1 |     151.1 |     394.9 | 161.3% |     414.9 |   5.1% |      419.4 |   1.1% |    2372.3 | 465.6% |     921.8 | -61.1% |
|   128 |  2 |     147.3 |     389.9 | 164.8% |     419.0 |   7.5% |      416.1 |  -0.7% |    1621.5 | 289.7% |     865.5 | -46.6% |
|   128 |  4 |     151.8 |     371.3 | 144.5% |     361.2 |  -2.7% |      387.0 |   7.1% |    1991.1 | 414.5% |     902.6 | -54.7% |
|   128 |  8 |     140.0 |     343.8 | 145.7% |     368.1 |   7.1% |      374.0 |   1.6% |    2183.1 | 483.7% |     916.8 | -58.0% |
|   128 | 16 |     146.7 |     349.7 | 138.4% |     374.3 |   7.0% |      358.6 |  -4.2% |    1896.5 | 428.9% |     895.2 | -52.8% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   256 |  1 |     252.2 |     526.4 | 108.7% |     519.4 |  -1.3% |      534.9 |   3.0% |    2801.8 | 423.8% |     872.0 | -68.9% |
|   256 |  2 |     244.7 |     523.5 | 114.0% |     524.4 |   0.2% |      520.2 |  -0.8% |    2745.8 | 427.8% |     756.8 | -72.4% |
|   256 |  4 |     232.1 |     523.6 | 125.5% |     493.4 |  -5.8% |      526.7 |   6.7% |    1734.8 | 229.4% |     879.4 | -49.3% |
|   256 |  8 |     236.1 |     479.7 | 103.2% |     472.6 |  -1.5% |      485.3 |   2.7% |    1852.7 | 281.8% |     847.2 | -54.3% |
|   256 | 16 |     228.6 |     474.8 | 107.7% |     482.8 |   1.7% |      489.0 |   1.3% |    1598.7 | 227.0% |     892.8 | -44.2% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   512 |  1 |     348.0 |     636.1 |  82.8% |     616.4 |  -3.1% |      629.7 |   2.2% |    2935.3 | 366.1% |     969.1 | -67.0% |
|   512 |  2 |     353.5 |     622.2 |  76.0% |     590.8 |  -5.1% |      597.8 |   1.2% |    2204.9 | 268.8% |     988.9 | -55.2% |
|   512 |  4 |     353.3 |     609.1 |  72.4% |     583.6 |  -4.2% |      604.0 |   3.5% |    2234.2 | 269.9% |     955.8 | -57.2% |
|   512 |  8 |     326.4 |     591.5 |  81.2% |     584.0 |  -1.3% |      594.5 |   1.8% |    2205.3 | 271.0% |     936.1 | -57.6% |
|   512 | 16 |     333.4 |     587.1 |  76.1% |     574.3 |  -2.2% |      589.8 |   2.7% |    1989.8 | 237.4% |     952.3 | -52.1% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  1024 |  1 |     461.8 |     700.0 |  51.6% |     636.3 |  -9.1% |      649.6 |   2.1% |    3020.7 | 365.0% |    1006.7 | -66.7% |
|  1024 |  2 |     452.3 |     703.9 |  55.6% |     652.1 |  -7.4% |      622.9 |  -4.5% |    2919.2 | 368.6% |     947.1 | -67.6% |
|  1024 |  4 |     443.4 |     670.7 |  51.2% |     636.9 |  -5.0% |      634.9 |  -0.3% |    2618.8 | 312.5% |    1001.0 | -61.8% |
|  1024 |  8 |     441.1 |     655.5 |  48.6% |     608.7 |  -7.1% |      635.5 |   4.4% |    2186.3 | 244.0% |     980.3 | -55.2% |
|  1024 | 16 |     436.6 |     652.1 |  49.3% |     625.9 |  -4.0% |      635.9 |   1.6% |    2173.4 | 241.8% |     982.2 | -54.8% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  2048 |  1 |     514.2 |     719.6 |  39.9% |     660.6 |  -8.2% |      677.1 |   2.5% |    3188.5 | 370.9% |    1015.5 | -68.1% |
|  2048 |  2 |     543.6 |     693.8 |  27.6% |     634.3 |  -8.6% |      645.7 |   1.8% |    3076.5 | 376.5% |    1033.3 | -66.4% |
|  2048 |  4 |     504.4 |     697.5 |  38.3% |     650.2 |  -6.8% |      658.0 |   1.2% |    2444.8 | 271.5% |    1016.1 | -58.4% |
|  2048 |  8 |     515.2 |     694.3 |  34.8% |     637.8 |  -8.1% |      663.0 |   3.9% |    2807.4 | 323.5% |    1006.1 | -64.2% |
|  2048 | 16 |     502.8 |     689.4 |  37.1% |     639.7 |  -7.2% |      663.5 |   3.7% |    2617.8 | 294.5% |     991.3 | -62.1% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  4096 |  1 |     570.9 |     743.2 |  30.2% |     681.9 |  -8.3% |      694.4 |   1.8% |    3620.6 | 421.4% |    1029.0 | -71.6% |
|  4096 |  2 |     561.3 |     748.1 |  33.3% |     651.4 | -12.9% |      664.9 |   2.1% |    2827.3 | 325.2% |    1026.8 | -63.7% |
|  4096 |  4 |     583.4 |     719.6 |  23.3% |     662.4 |  -7.9% |      677.8 |   2.3% |    2816.8 | 315.6% |    1005.9 | -64.3% |
|  4096 |  8 |     562.7 |     722.8 |  28.4% |     670.1 |  -7.3% |      680.6 |   1.6% |    3002.3 | 341.1% |    1006.4 | -66.5% |
|  4096 | 16 |     567.6 |     713.4 |  25.7% |     661.2 |  -7.3% |      682.0 |   3.1% |    2700.2 | 295.9% |    1015.6 | -62.4% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  8192 |  1 |     621.1 |     753.5 |  21.3% |     687.7 |  -8.7% |      701.1 |   1.9% |    4044.4 | 476.9% |    1032.9 | -74.5% |
|  8192 |  2 |     579.4 |     710.1 |  22.6% |     652.6 |  -8.1% |      707.9 |   8.5% |    4040.9 | 470.8% |    1043.6 | -74.2% |
|  8192 |  4 |     603.6 |     721.5 |  19.5% |     677.2 |  -6.1% |      675.5 |  -0.3% |    3049.6 | 351.5% |    1025.3 | -66.4% |
|  8192 |  8 |     558.3 |     714.2 |  27.9% |     660.4 |  -7.5% |      684.0 |   3.6% |    3189.0 | 366.2% |    1024.9 | -67.9% |
|  8192 | 16 |     587.3 |     730.7 |  24.4% |     657.7 | -10.0% |      682.0 |   3.7% |    2822.2 | 313.8% |    1007.1 | -64.3% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 16384 |  1 |     633.3 |     754.9 |  19.2% |     689.3 |  -8.7% |      704.5 |   2.2% |    4114.2 | 484.0% |    1034.7 | -74.8% |
| 16384 |  2 |     568.3 |     681.1 |  19.9% |     631.5 |  -7.3% |      646.8 |   2.4% |    3135.5 | 384.8% |    1045.7 | -66.7% |
| 16384 |  4 |     586.9 |     688.3 |  17.3% |     669.5 |  -2.7% |      652.3 |  -2.6% |    3083.4 | 372.7% |    1012.9 | -67.1% |
| 16384 |  8 |     597.9 |     726.2 |  21.5% |     635.5 | -12.5% |      654.5 |   3.0% |    2851.8 | 335.7% |    1036.8 | -63.6% |
| 16384 | 16 |     592.1 |     698.1 |  17.9% |     639.2 |  -8.4% |      655.6 |   2.6% |    3064.9 | 367.5% |    1011.5 | -67.0% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 32768 |  1 |     640.9 |     756.8 |  18.1% |     688.7 |  -9.0% |      703.6 |   2.2% |    4401.6 | 525.6% |    1037.7 | -76.4% |
| 32768 |  2 |     592.4 |     668.7 |  12.9% |     691.1 |   3.3% |      642.6 |  -7.0% |    3277.6 | 410.1% |     975.2 | -70.2% |
| 32768 |  4 |     565.4 |     724.9 |  28.2% |     633.0 | -12.7% |      646.1 |   2.1% |    3265.6 | 405.4% |    1030.5 | -68.4% |
| 32768 |  8 |     601.3 |     683.1 |  13.6% |     623.8 |  -8.7% |      639.9 |   2.6% |    3460.8 | 440.9% |    1007.3 | -70.9% |
| 32768 | 16 |     590.8 |     696.0 |  17.8% |     625.5 | -10.1% |      645.1 |   3.1% |    2790.5 | 332.6% |    1010.7 | -63.8% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 65536 |  1 |     630.3 |     761.5 |  20.8% |     692.2 |  -9.1% |      709.6 |   2.5% |    4314.6 | 508.0% |    1037.5 | -76.0% |
| 65536 |  2 |     603.9 |     690.4 |  14.3% |     687.9 |  -0.4% |      621.9 |  -9.6% |    3258.4 | 423.9% |     974.2 | -70.1% |
| 65536 |  4 |     603.0 |     692.8 |  14.9% |     618.4 | -10.7% |      616.6 |  -0.3% |    3278.9 | 431.8% |    1001.4 | -69.5% |
| 65536 |  8 |     606.3 |     697.7 |  15.1% |     646.2 |  -7.4% |      639.9 |  -1.0% |    3559.0 | 456.1% |    1007.5 | -71.7% |
| 65536 | 16 |     587.2 |     703.6 |  19.8% |     655.4 |  -6.9% |      637.0 |  -2.8% |    3083.7 | 384.1% |    1011.0 | -67.2% |
Elapsed 464.6s
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

Results (With this commit)

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Detecting the operating system and CPU architecture
[INFO] ------------------------------------------------------------------------
[INFO] os.detected.name: linux
[INFO] os.detected.arch: riscv64
[INFO] os.detected.bitness: 64
[INFO] os.detected.version: 6.12
[INFO] os.detected.version.major: 6
[INFO] os.detected.version.minor: 12
[INFO] os.detected.release: PolyOS
[INFO] os.detected.release.version: 24.03
[INFO] os.detected.release.like.PolyOS: true
[INFO] os.detected.classifier: linux-riscv64
[INFO] 
[INFO] ------------------< org.apache.hadoop:hadoop-common >-------------------
[INFO] Building Apache Hadoop Common 3.6.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- exec-maven-plugin:1.3.1:java (default-cli) @ hadoop-common ---
[WARNING] Warning: killAfter is now deprecated. Do you need it ? Please comment on MEXEC-6.
                 java.version = 17.0.11
            java.runtime.name = OpenJDK Runtime Environment
         java.runtime.version = 17.0.11+9
              java.vm.version = 17.0.11+9
               java.vm.vendor = BiSheng
                 java.vm.name = OpenJDK 64-Bit Server VM
java.vm.specification.version = 17
   java.specification.version = 17
                      os.arch = riscv64
                      os.name = Linux
                   os.version = 6.12.74-0.0.0.0.riscv64
Data Length = 64 MB
Trials      = 5

Direct Buffer Performance Table (bpc: byte-per-crc in MB/sec; #T: #Theads)
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|    32 |  1 |      52.5 |     161.6 | 207.8% |     187.5 |  16.0% |      185.6 |  -1.0% |     450.3 | 142.7% |      70.4 | -84.4% |
|    32 |  2 |      52.8 |     162.1 | 206.9% |     185.1 |  14.2% |      185.4 |   0.2% |     505.0 | 172.4% |      70.3 | -86.1% |
|    32 |  4 |      52.5 |     161.3 | 206.9% |     186.6 |  15.7% |      184.0 |  -1.4% |     471.6 | 156.3% |      70.5 | -85.1% |
|    32 |  8 |      52.6 |     122.7 | 133.4% |     186.2 |  51.7% |      184.8 |  -0.7% |     485.7 | 162.7% |      70.4 | -85.5% |
|    32 | 16 |      51.9 |     159.8 | 207.8% |     184.9 |  15.7% |      182.9 |  -1.1% |     483.9 | 164.6% |      70.3 | -85.5% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|    64 |  1 |      97.3 |     271.0 | 178.6% |     294.5 |   8.7% |      296.4 |   0.7% |     285.5 |  -3.7% |     717.7 | 151.4% |
|    64 |  2 |      97.8 |     271.4 | 177.4% |     292.3 |   7.7% |      297.3 |   1.7% |     290.0 |  -2.5% |     751.1 | 159.0% |
|    64 |  4 |      96.5 |     269.1 | 178.9% |     293.3 |   9.0% |      296.2 |   1.0% |     291.2 |  -1.7% |     738.5 | 153.6% |
|    64 |  8 |      96.0 |     270.8 | 182.3% |     290.5 |   7.3% |      295.7 |   1.8% |     293.8 |  -0.7% |     752.7 | 156.2% |
|    64 | 16 |      94.8 |     265.6 | 180.1% |     291.7 |   9.9% |      293.7 |   0.7% |     300.5 |   2.3% |     746.5 | 148.4% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   128 |  1 |     165.5 |     406.5 | 145.6% |     415.9 |   2.3% |      422.5 |   1.6% |    2391.2 | 465.9% |     679.0 | -71.6% |
|   128 |  2 |     163.9 |     407.0 | 148.3% |     417.5 |   2.6% |      424.7 |   1.7% |    1645.0 | 287.3% |     627.4 | -61.9% |
|   128 |  4 |     166.1 |     402.7 | 142.4% |     415.9 |   3.3% |      420.4 |   1.1% |    1998.6 | 375.4% |     693.3 | -65.3% |
|   128 |  8 |     148.1 |     393.6 | 165.7% |     404.7 |   2.8% |      417.7 |   3.2% |    2014.1 | 382.2% |     698.0 | -65.3% |
|   128 | 16 |     159.0 |     393.6 | 147.5% |     413.8 |   5.1% |      418.3 |   1.1% |    1878.0 | 349.0% |     672.9 | -64.2% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   256 |  1 |     258.3 |     535.9 | 107.5% |     522.9 |  -2.4% |      537.6 |   2.8% |    2924.1 | 443.9% |    2982.3 |   2.0% |
|   256 |  2 |     258.6 |     540.1 | 108.8% |     529.2 |  -2.0% |      540.5 |   2.1% |    2890.8 | 434.9% |    3023.4 |   4.6% |
|   256 |  4 |     254.4 |     523.2 | 105.6% |     525.7 |   0.5% |      536.9 |   2.1% |    2350.8 | 337.9% |    2518.3 |   7.1% |
|   256 |  8 |     250.6 |     523.3 | 108.8% |     516.4 |  -1.3% |      532.8 |   3.2% |    2176.6 | 308.5% |    2529.9 |  16.2% |
|   256 | 16 |     242.5 |     517.0 | 113.2% |     520.4 |   0.7% |      530.6 |   2.0% |    2334.7 | 340.0% |    2518.4 |   7.9% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   512 |  1 |     366.5 |     642.4 |  75.3% |     614.5 |  -4.3% |      632.2 |   2.9% |    3498.9 | 453.5% |    3698.0 |   5.7% |
|   512 |  2 |     374.7 |     638.4 |  70.4% |     617.5 |  -3.3% |      615.5 |  -0.3% |    2350.3 | 281.9% |    3737.5 |  59.0% |
|   512 |  4 |     360.3 |     624.6 |  73.3% |     614.3 |  -1.7% |      622.6 |   1.4% |    2908.9 | 367.2% |    2996.8 |   3.0% |
|   512 |  8 |     335.3 |     624.8 |  86.4% |     605.2 |  -3.1% |      620.8 |   2.6% |    2607.8 | 320.1% |    2645.3 |   1.4% |
|   512 | 16 |     323.5 |     621.0 |  92.0% |     605.6 |  -2.5% |      618.4 |   2.1% |    2762.1 | 346.6% |    3002.4 |   8.7% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  1024 |  1 |     441.4 |     703.1 |  59.3% |     655.2 |  -6.8% |      665.0 |   1.5% |    3036.7 | 356.7% |    3596.7 |  18.4% |
|  1024 |  2 |     451.0 |     698.2 |  54.8% |     658.4 |  -5.7% |      668.6 |   1.5% |    3030.4 | 353.3% |    3588.8 |  18.4% |
|  1024 |  4 |     431.2 |     680.3 |  57.8% |     656.7 |  -3.5% |      652.2 |  -0.7% |    2657.5 | 307.5% |    3025.9 |  13.9% |
|  1024 |  8 |     450.4 |     681.5 |  51.3% |     648.9 |  -4.8% |      652.5 |   0.6% |    2653.0 | 306.6% |    2751.4 |   3.7% |
|  1024 | 16 |     439.5 |     681.8 |  55.1% |     643.6 |  -5.6% |      641.3 |  -0.4% |    2493.0 | 288.7% |    3027.8 |  21.5% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  2048 |  1 |     503.4 |     721.2 |  43.3% |     662.7 |  -8.1% |      676.9 |   2.1% |    3179.3 | 369.7% |    3529.7 |  11.0% |
|  2048 |  2 |     504.8 |     718.7 |  42.4% |     664.2 |  -7.6% |      680.9 |   2.5% |    3175.8 | 366.4% |    3575.9 |  12.6% |
|  2048 |  4 |     508.9 |     700.5 |  37.6% |     653.3 |  -6.7% |      667.2 |   2.1% |    2736.8 | 310.2% |    3070.5 |  12.2% |
|  2048 |  8 |     515.9 |     706.8 |  37.0% |     649.2 |  -8.1% |      671.5 |   3.4% |    2577.8 | 283.9% |    2819.4 |   9.4% |
|  2048 | 16 |     500.9 |     703.8 |  40.5% |     655.3 |  -6.9% |      668.0 |   1.9% |    2592.2 | 288.0% |    3056.3 |  17.9% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  4096 |  1 |     516.6 |     738.7 |  43.0% |     679.8 |  -8.0% |      695.8 |   2.4% |    3673.4 | 427.9% |    4485.6 |  22.1% |
|  4096 |  2 |     524.9 |     744.0 |  41.7% |     683.5 |  -8.1% |      702.7 |   2.8% |    3670.5 | 422.4% |    4562.3 |  24.3% |
|  4096 |  4 |     561.4 |     733.6 |  30.7% |     674.0 |  -8.1% |      700.3 |   3.9% |    3189.5 | 355.5% |    3617.4 |  13.4% |
|  4096 |  8 |     543.8 |     731.5 |  34.5% |     668.2 |  -8.7% |      684.7 |   2.5% |    2952.8 | 331.3% |    3634.1 |  23.1% |
|  4096 | 16 |     553.6 |     727.7 |  31.4% |     675.2 |  -7.2% |      688.9 |   2.0% |    3063.0 | 344.6% |    3630.8 |  18.5% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  8192 |  1 |     584.1 |     750.2 |  28.4% |     680.6 |  -9.3% |      700.2 |   2.9% |    3973.5 | 467.5% |    5100.4 |  28.4% |
|  8192 |  2 |     592.4 |     752.6 |  27.0% |     687.1 |  -8.7% |      705.2 |   2.6% |    3986.6 | 465.3% |    5057.9 |  26.9% |
|  8192 |  4 |     563.8 |     737.5 |  30.8% |     665.8 |  -9.7% |      688.5 |   3.4% |    3457.2 | 402.2% |    3954.0 |  14.4% |
|  8192 |  8 |     580.8 |     727.3 |  25.2% |     665.0 |  -8.6% |      679.0 |   2.1% |    3202.9 | 371.7% |    3415.2 |   6.6% |
|  8192 | 16 |     574.4 |     731.8 |  27.4% |     675.0 |  -7.8% |      685.0 |   1.5% |    3512.6 | 412.8% |    3899.5 |  11.0% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 16384 |  1 |     617.4 |     751.0 |  21.6% |     682.4 |  -9.1% |      695.0 |   1.8% |    4139.6 | 495.6% |    5706.5 |  37.9% |
| 16384 |  2 |     611.9 |     755.6 |  23.5% |     687.1 |  -9.1% |      703.5 |   2.4% |    4158.4 | 491.1% |    5694.4 |  36.9% |
| 16384 |  4 |     583.7 |     727.0 |  24.5% |     664.8 |  -8.6% |      683.0 |   2.7% |    3629.5 | 431.4% |    4325.6 |  19.2% |
| 16384 |  8 |     585.0 |     719.5 |  23.0% |     660.9 |  -8.2% |      671.3 |   1.6% |    3784.6 | 463.8% |    4261.1 |  12.6% |
| 16384 | 16 |     589.9 |     721.6 |  22.3% |     662.4 |  -8.2% |      676.2 |   2.1% |    3693.9 | 446.3% |    4556.3 |  23.3% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 32768 |  1 |     641.5 |     754.5 |  17.6% |     686.4 |  -9.0% |      699.1 |   1.9% |    4389.4 | 527.8% |    6255.9 |  42.5% |
| 32768 |  2 |     579.3 |     756.5 |  30.6% |     689.7 |  -8.8% |      704.8 |   2.2% |    4318.7 | 512.8% |    6236.5 |  44.4% |
| 32768 |  4 |     609.3 |     722.7 |  18.6% |     655.0 |  -9.4% |      690.3 |   5.4% |    3799.8 | 450.5% |    4543.7 |  19.6% |
| 32768 |  8 |     596.2 |     730.5 |  22.5% |     664.9 |  -9.0% |      668.0 |   0.5% |    4009.4 | 500.2% |    4311.6 |   7.5% |
| 32768 | 16 |     594.9 |     725.2 |  21.9% |     651.5 | -10.2% |      671.2 |   3.0% |    3869.9 | 476.6% |    4823.0 |  24.6% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 65536 |  1 |     649.6 |     758.6 |  16.8% |     690.7 |  -8.9% |      707.2 |   2.4% |    4433.7 | 527.0% |    6060.3 |  36.7% |
| 65536 |  2 |     606.3 |     758.3 |  25.1% |     637.3 | -16.0% |      708.3 |  11.1% |    4437.3 | 526.5% |    6235.9 |  40.5% |
| 65536 |  4 |     601.2 |     723.8 |  20.4% |     660.5 |  -8.7% |      679.3 |   2.8% |    3832.5 | 464.2% |    4620.2 |  20.6% |
| 65536 |  8 |     608.1 |     718.5 |  18.2% |     676.1 |  -5.9% |      676.5 |   0.1% |    4424.1 | 554.0% |    4624.2 |   4.5% |
| 65536 | 16 |     596.1 |     727.7 |  22.1% |     651.9 | -10.4% |      674.5 |   3.5% |    3911.9 | 480.0% |    4091.1 |   4.6% |
Elapsed 460.2s
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

For code changes:

  • Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
  • Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
  • If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
  • If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

@peterpetrica @gong-flying
[RISC-V] Add Zbc-accelerated native CRC32C path in bulk CRC implement…
8f20fcd 
…ation

Co-authored-by: gong-flying <gongxiaofei24@iscas.ac.cn>
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pan3793 commented Mar 31, 2026 •
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Modern JDKs should be able to leverage hardware capabilities to speed up CRC32/CRC32C calculations. Have you compared this implementation with the JDK built-in one? If JDK does this well, seems we don't need to duplicate this on the Hadoop side.

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PeterPtroc commented Mar 31, 2026

Modern JDKs should be able to leverage hardware capabilities to speed up CRC32/CRC32C calculations. Have you compared this implementation with the JDK built-in one? If JDK does this well, seems we don't need to duplicate this on the Hadoop side.

Great point. I agree that leveraging JDK intrinsics is the way to go if the performance is on par or better. I'm running some benchmarks to compare our implementation against the built-in CRC32/CRC32C on modern JDKs across different environments. I'll update the thread with the results once I have them.

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@PeterPtroc @hadoop-yetus @pan3793 @peterpetrica