HADOOP-19724. [RISC-V] Add rv64 Zbc (CLMUL) bulk CRC32 (CRC32C not optimized) #8031

PeterPtroc · 2025-10-13T15:57:32Z

Description of PR

Introduces a riscv64 native implementation path for CRC32 (CRC32C not optimized).
Adds runtime CPU feature detection on linux-riscv64 to enable hardware-accelerated CRC32 when available; falls back to the existing implementation if native is unavailable or disabled.

Below are the performance changes observed using the built-in CRC32 benchmark. Although performance is poor when bpc <= 64, there are substantial improvements when bpc > 64. To keep the codebase simple and maintainable, I did not add bpc-size-specific handling.

bpc	#T	Native (origin)	Native (new)	Δ (MB/s)	Δ%
32	1	661.5	463.5	-198.0	-29.9%
32	2	642.6	491.4	-151.2	-23.5%
32	4	663.7	480.5	-183.2	-27.6%
32	8	653.0	472.0	-181.0	-27.7%
32	16	656.1	473.4	-182.7	-27.8%
64	1	793.9	318.0	-475.9	-59.9%
64	2	771.3	322.1	-449.2	-58.2%
64	4	787.3	315.0	-472.3	-60.0%
64	8	778.0	309.3	-468.7	-60.2%
64	16	773.5	308.1	-465.4	-60.2%
128	1	878.8	2398.8	+1520.0	+173.0%
128	2	846.8	1723.9	+877.1	+103.6%
128	4	861.2	1690.0	+828.8	+96.2%
128	8	857.8	1373.3	+515.5	+60.1%
128	16	853.8	1361.3	+507.5	+59.4%
256	1	783.9	2752.5	+1968.6	+251.1%
256	2	810.0	2053.3	+1243.3	+153.5%
256	4	835.2	1966.5	+1131.3	+135.5%
256	8	812.4	1756.3	+943.9	+116.2%
256	16	811.8	1524.7	+712.9	+87.8%
512	1	923.6	3328.9	+2405.3	+260.4%
512	2	886.5	3295.1	+2408.6	+271.7%
512	4	910.5	2359.9	+1449.4	+159.2%
512	8	888.1	1637.4	+749.3	+84.4%
512	16	897.0	1840.1	+943.1	+105.1%
1024	1	950.4	3045.0	+2094.6	+220.4%
1024	2	918.0	2202.9	+1284.9	+140.0%
1024	4	937.6	2040.4	+1102.8	+117.6%
1024	8	916.5	1961.5	+1045.0	+114.0%
1024	16	927.4	2003.9	+1076.5	+116.1%
2048	1	962.3	3189.1	+2226.8	+231.4%
2048	2	970.1	3192.3	+2222.2	+229.1%
2048	4	943.4	2411.2	+1467.8	+155.6%
2048	8	937.6	1837.7	+900.1	+96.0%
2048	16	933.1	1864.0	+930.9	+99.8%
4096	1	969.9	3654.5	+2684.6	+276.8%
4096	2	972.0	2798.0	+1826.0	+187.9%
4096	4	960.1	2307.0	+1346.9	+140.3%
4096	8	948.2	2753.1	+1804.9	+190.4%
4096	16	938.7	2170.5	+1231.8	+131.2%
8192	1	973.6	4008.1	+3034.5	+311.7%
8192	2	922.5	3018.2	+2095.7	+227.2%
8192	4	955.6	2968.7	+2013.1	+210.7%
8192	8	943.4	2077.9	+1134.5	+120.3%
8192	16	944.9	2191.7	+1246.8	+132.0%
16384	1	974.4	4090.3	+3115.9	+319.8%
16384	2	978.3	2999.6	+2021.3	+206.6%
16384	4	956.6	3248.9	+2292.3	+239.6%
16384	8	950.8	3228.0	+2277.2	+239.5%
16384	16	941.2	2832.1	+1890.9	+200.9%
32768	1	972.2	4205.7	+3233.5	+332.6%
32768	2	938.6	4115.2	+3176.6	+338.4%
32768	4	957.4	2508.9	+1551.5	+162.1%
32768	8	952.8	2319.8	+1367.0	+143.5%
32768	16	944.5	1657.7	+713.2	+75.5%
65536	1	976.3	4226.6	+3250.3	+332.9%
65536	2	940.0	3075.8	+2135.8	+227.2%
65536	4	958.5	1345.2	+386.7	+40.3%
65536	8	950.2	1954.7	+1004.5	+105.7%
65536	16	945.8	2414.0	+1468.2	+155.2%

How was this patch tested?

Built hadoop-common with native profile on riscv64; verified it's function by TestNativeCrc32.
Ran Hadoop’s CRC32 benchmark on riscv64 (OpenEuler/EulixOS) with JDK 17.
Here is the commands and results:

Command：

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

Results

[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: 2.017 s -- in org.apache.hadoop.util.TestNativeCrc32
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 22, Failures: 0, Errors: 0, Skipped: 0
------------------------------------------------------------------------
[INFO] BUILD SUCCESS

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: EulixOS
[INFO] os.detected.release.version: 3.0
[INFO] os.detected.release.like.EulixOS: true
[INFO] os.detected.classifier: linux-riscv64
[INFO] 
[INFO] ------------------< org.apache.hadoop:hadoop-common >-------------------
[INFO] Building Apache Hadoop Common 3.5.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- exec: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 = 6.12.35.eos30.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 |      49.8 |     161.9 | 225.0% |     186.8 |  15.4% |      172.8 |  -7.5% |     661.5 | 282.9% |     659.8 |  -0.3% |
|    32 |  2 |      49.4 |     142.9 | 189.2% |     184.0 |  28.7% |      165.1 | -10.3% |     642.6 | 289.3% |     639.2 |  -0.5% |
|    32 |  4 |      49.4 |     144.9 | 193.2% |     186.8 |  28.9% |      183.1 |  -2.0% |     663.7 | 262.4% |     659.7 |  -0.6% |
|    32 |  8 |      48.7 |     146.4 | 200.7% |     183.5 |  25.3% |      182.3 |  -0.7% |     653.0 | 258.2% |     650.2 |  -0.4% |
|    32 | 16 |      47.6 |     142.5 | 199.3% |     185.1 |  30.0% |      182.4 |  -1.5% |     656.1 | 259.8% |     653.7 |  -0.4% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|    64 |  1 |      94.6 |     271.8 | 187.4% |     294.0 |   8.2% |      282.6 |  -3.9% |     793.9 | 181.0% |     793.9 |  -0.0% |
|    64 |  2 |      93.8 |     268.1 | 185.9% |     291.3 |   8.7% |      292.0 |   0.3% |     771.3 | 164.1% |     765.3 |  -0.8% |
|    64 |  4 |      93.0 |     268.5 | 188.6% |     284.9 |   6.1% |      294.2 |   3.3% |     787.3 | 167.6% |     781.0 |  -0.8% |
|    64 |  8 |      91.6 |     267.3 | 192.0% |     286.6 |   7.2% |      291.5 |   1.7% |     778.0 | 166.9% |     773.1 |  -0.6% |
|    64 | 16 |      91.3 |     265.8 | 191.1% |     290.0 |   9.1% |      291.1 |   0.4% |     773.5 | 165.7% |     772.5 |  -0.1% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   128 |  1 |     161.9 |     406.2 | 150.9% |     417.7 |   2.8% |      421.9 |   1.0% |     878.8 | 108.3% |     874.7 |  -0.5% |
|   128 |  2 |     156.2 |     398.5 | 155.2% |     419.4 |   5.2% |      404.4 |  -3.6% |     846.8 | 109.4% |     845.6 |  -0.1% |
|   128 |  4 |     160.3 |     382.8 | 138.8% |     401.7 |   4.9% |      419.4 |   4.4% |     861.2 | 105.3% |     860.1 |  -0.1% |
|   128 |  8 |     151.7 |     395.5 | 160.6% |     400.1 |   1.2% |      417.0 |   4.2% |     857.8 | 105.7% |     853.8 |  -0.5% |
|   128 | 16 |     152.9 |     391.4 | 156.0% |     408.7 |   4.4% |      415.5 |   1.7% |     853.8 | 105.5% |     849.0 |  -0.6% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   256 |  1 |     254.8 |     512.3 | 101.1% |     522.7 |   2.0% |      537.2 |   2.8% |     783.9 |  45.9% |     847.9 |   8.2% |
|   256 |  2 |     248.2 |     512.0 | 106.3% |     512.7 |   0.1% |      509.2 |  -0.7% |     810.0 |  59.1% |     838.7 |   3.5% |
|   256 |  4 |     248.1 |     514.7 | 107.5% |     505.3 |  -1.8% |      523.3 |   3.6% |     835.2 |  59.6% |     854.0 |   2.2% |
|   256 |  8 |     246.1 |     508.1 | 106.5% |     501.1 |  -1.4% |      522.4 |   4.2% |     812.4 |  55.5% |     840.3 |   3.4% |
|   256 | 16 |     242.0 |     505.1 | 108.7% |     503.8 |  -0.2% |      520.9 |   3.4% |     811.8 |  55.8% |     836.1 |   3.0% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   512 |  1 |     368.7 |     640.3 |  73.6% |     613.7 |  -4.2% |      628.9 |   2.5% |     923.6 |  46.9% |     929.1 |   0.6% |
|   512 |  2 |     354.3 |     564.3 |  59.3% |     598.4 |   6.1% |      598.8 |   0.1% |     886.5 |  48.1% |     884.6 |  -0.2% |
|   512 |  4 |     357.0 |     597.0 |  67.2% |     589.0 |  -1.3% |      615.4 |   4.5% |     910.5 |  47.9% |     914.8 |   0.5% |
|   512 |  8 |     353.0 |     609.0 |  72.5% |     591.8 |  -2.8% |      617.0 |   4.3% |     888.1 |  43.9% |     896.0 |   0.9% |
|   512 | 16 |     349.2 |     607.0 |  73.8% |     593.9 |  -2.2% |      606.9 |   2.2% |     897.0 |  47.8% |     893.9 |  -0.3% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  1024 |  1 |     473.2 |     684.2 |  44.6% |     653.3 |  -4.5% |      663.8 |   1.6% |     950.4 |  43.2% |     943.5 |  -0.7% |
|  1024 |  2 |     431.2 |     669.8 |  55.3% |     631.6 |  -5.7% |      632.0 |   0.1% |     918.0 |  45.3% |     949.6 |   3.4% |
|  1024 |  4 |     443.3 |     681.9 |  53.8% |     620.0 |  -9.1% |      639.7 |   3.2% |     937.6 |  46.6% |     934.0 |  -0.4% |
|  1024 |  8 |     435.6 |     653.8 |  50.1% |     602.6 |  -7.8% |      630.4 |   4.6% |     916.5 |  45.4% |     897.8 |  -2.0% |
|  1024 | 16 |     423.7 |     640.9 |  51.2% |     610.0 |  -4.8% |      628.3 |   3.0% |     927.4 |  47.6% |     926.5 |  -0.1% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  2048 |  1 |     518.3 |     719.7 |  38.8% |     660.8 |  -8.2% |      677.9 |   2.6% |     962.3 |  42.0% |     957.0 |  -0.5% |
|  2048 |  2 |     516.9 |     678.7 |  31.3% |     634.2 |  -6.6% |      652.0 |   2.8% |     970.1 |  48.8% |     964.7 |  -0.6% |
|  2048 |  4 |     504.9 |     681.2 |  34.9% |     635.0 |  -6.8% |      658.0 |   3.6% |     943.4 |  43.4% |     946.7 |   0.4% |
|  2048 |  8 |     502.3 |     662.5 |  31.9% |     625.6 |  -5.6% |      624.4 |  -0.2% |     937.6 |  50.2% |     932.6 |  -0.5% |
|  2048 | 16 |     490.1 |     663.8 |  35.4% |     631.0 |  -4.9% |      652.9 |   3.5% |     933.1 |  42.9% |     931.1 |  -0.2% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  4096 |  1 |     524.8 |     743.4 |  41.7% |     676.6 |  -9.0% |      686.9 |   1.5% |     969.9 |  41.2% |     964.1 |  -0.6% |
|  4096 |  2 |     560.0 |     746.9 |  33.4% |     681.0 |  -8.8% |      698.5 |   2.6% |     972.0 |  39.2% |     933.7 |  -3.9% |
|  4096 |  4 |     529.5 |     651.7 |  23.1% |     664.7 |   2.0% |      683.6 |   2.8% |     960.1 |  40.4% |     968.4 |   0.9% |
|  4096 |  8 |     543.4 |     692.3 |  27.4% |     649.0 |  -6.3% |      669.6 |   3.2% |     948.2 |  41.6% |     947.2 |  -0.1% |
|  4096 | 16 |     533.6 |     696.7 |  30.6% |     648.5 |  -6.9% |      662.0 |   2.1% |     938.7 |  41.8% |     940.0 |   0.1% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  8192 |  1 |     570.8 |     751.8 |  31.7% |     682.5 |  -9.2% |      679.1 |  -0.5% |     973.6 |  43.4% |     951.5 |  -2.3% |
|  8192 |  2 |     581.1 |     682.4 |  17.4% |     629.2 |  -7.8% |      644.7 |   2.5% |     922.5 |  43.1% |     974.2 |   5.6% |
|  8192 |  4 |     560.8 |     682.9 |  21.8% |     648.3 |  -5.1% |      671.2 |   3.5% |     955.6 |  42.4% |     951.5 |  -0.4% |
|  8192 |  8 |     570.1 |     690.3 |  21.1% |     632.0 |  -8.4% |      642.4 |   1.6% |     943.4 |  46.9% |     948.6 |   0.6% |
|  8192 | 16 |     560.6 |     691.2 |  23.3% |     645.3 |  -6.6% |      646.0 |   0.1% |     944.9 |  46.3% |     940.4 |  -0.5% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 16384 |  1 |     631.0 |     750.6 |  18.9% |     681.1 |  -9.3% |      702.8 |   3.2% |     974.4 |  38.6% |     967.5 |  -0.7% |
| 16384 |  2 |     603.7 |     754.5 |  25.0% |     688.7 |  -8.7% |      704.2 |   2.3% |     978.3 |  38.9% |     974.1 |  -0.4% |
| 16384 |  4 |     585.9 |     728.4 |  24.3% |     630.7 | -13.4% |      683.6 |   8.4% |     956.6 |  39.9% |     951.1 |  -0.6% |
| 16384 |  8 |     567.8 |     659.9 |  16.2% |     612.5 |  -7.2% |      633.0 |   3.3% |     950.8 |  50.2% |     943.3 |  -0.8% |
| 16384 | 16 |     578.0 |     692.6 |  19.8% |     599.7 | -13.4% |      633.3 |   5.6% |     941.2 |  48.6% |     935.8 |  -0.6% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 32768 |  1 |     625.6 |     744.7 |  19.0% |     680.3 |  -8.6% |      701.3 |   3.1% |     972.2 |  38.6% |     966.4 |  -0.6% |
| 32768 |  2 |     630.3 |     757.7 |  20.2% |     686.6 |  -9.4% |      643.5 |  -6.3% |     938.6 |  45.9% |     976.8 |   4.1% |
| 32768 |  4 |     585.1 |     702.9 |  20.1% |     644.8 |  -8.3% |      640.1 |  -0.7% |     957.4 |  49.6% |     957.0 |  -0.0% |
| 32768 |  8 |     555.8 |     650.8 |  17.1% |     608.9 |  -6.4% |      640.7 |   5.2% |     952.8 |  48.7% |     945.4 |  -0.8% |
| 32768 | 16 |     554.5 |     664.4 |  19.8% |     600.8 |  -9.6% |      603.9 |   0.5% |     944.5 |  56.4% |     942.3 |  -0.2% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 65536 |  1 |     601.3 |     749.4 |  24.6% |     681.2 |  -9.1% |      703.8 |   3.3% |     976.3 |  38.7% |     970.8 |  -0.6% |
| 65536 |  2 |     556.5 |     677.6 |  21.8% |     625.0 |  -7.8% |      637.5 |   2.0% |     940.0 |  47.5% |     937.3 |  -0.3% |
| 65536 |  4 |     546.2 |     678.5 |  24.2% |     632.9 |  -6.7% |      642.6 |   1.5% |     958.5 |  49.2% |     957.2 |  -0.1% |
| 65536 |  8 |     561.6 |     656.8 |  17.0% |     589.6 | -10.2% |      602.7 |   2.2% |     950.2 |  57.7% |     947.6 |  -0.3% |
| 65536 | 16 |     564.9 |     631.9 |  11.8% |     646.2 |   2.3% |      580.0 | -10.2% |     945.8 |  63.1% |     952.4 |   0.7% |
Elapsed 523.5s
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  08:53 min

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: EulixOS
[INFO] os.detected.release.version: 3.0
[INFO] os.detected.release.like.EulixOS: true
[INFO] os.detected.classifier: linux-riscv64
[INFO] 
[INFO] ------------------< org.apache.hadoop:hadoop-common >-------------------
[INFO] Building Apache Hadoop Common 3.5.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- exec: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 = 6.12.35.eos30.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 |      50.8 |     159.1 | 213.2% |     187.0 |  17.5% |      184.3 |  -1.5% |     463.5 | 151.5% |     667.0 |  43.9% |
|    32 |  2 |      51.2 |     161.1 | 214.9% |     186.2 |  15.6% |      183.7 |  -1.3% |     491.4 | 167.5% |     649.1 |  32.1% |
|    32 |  4 |      51.0 |     162.9 | 219.4% |     177.9 |   9.2% |      183.7 |   3.3% |     480.5 | 161.5% |     661.3 |  37.6% |
|    32 |  8 |      46.4 |     162.6 | 250.4% |     185.1 |  13.8% |      181.9 |  -1.7% |     472.0 | 159.5% |     655.7 |  38.9% |
|    32 | 16 |      48.1 |     162.5 | 238.0% |     185.8 |  14.4% |      177.8 |  -4.3% |     473.4 | 166.2% |     649.6 |  37.2% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|    64 |  1 |      87.8 |     272.5 | 210.2% |     293.0 |   7.5% |      295.4 |   0.8% |     318.0 |   7.7% |     783.2 | 146.3% |
|    64 |  2 |      90.8 |     269.6 | 196.8% |     270.3 |   0.2% |      279.7 |   3.5% |     322.1 |  15.2% |     788.0 | 144.7% |
|    64 |  4 |      90.9 |     272.2 | 199.6% |     293.3 |   7.7% |      288.4 |  -1.7% |     315.0 |   9.2% |     787.1 | 149.9% |
|    64 |  8 |      83.8 |     262.5 | 213.1% |     291.1 |  10.9% |      281.3 |  -3.4% |     309.3 |  10.0% |     763.4 | 146.8% |
|    64 | 16 |      84.5 |     268.2 | 217.2% |     289.1 |   7.8% |      279.6 |  -3.3% |     308.1 |  10.2% |     770.7 | 150.2% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   128 |  1 |     168.3 |     407.0 | 141.9% |     419.8 |   3.2% |      422.7 |   0.7% |    2398.8 | 467.5% |     866.5 | -63.9% |
|   128 |  2 |     167.2 |     407.5 | 143.8% |     403.4 |  -1.0% |      405.6 |   0.5% |    1723.9 | 325.0% |     818.5 | -52.5% |
|   128 |  4 |     156.9 |     398.9 | 154.3% |     411.6 |   3.2% |      405.1 |  -1.6% |    1690.0 | 317.2% |     848.3 | -49.8% |
|   128 |  8 |     156.4 |     397.5 | 154.1% |     406.9 |   2.4% |      395.8 |  -2.7% |    1373.3 | 247.0% |     842.8 | -38.6% |
|   128 | 16 |     151.1 |     399.5 | 164.4% |     410.6 |   2.8% |      399.2 |  -2.8% |    1361.3 | 241.0% |     848.1 | -37.7% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   256 |  1 |     258.1 |     531.3 | 105.8% |     530.8 |  -0.1% |      531.4 |   0.1% |    2752.5 | 418.0% |     612.1 | -77.8% |
|   256 |  2 |     256.8 |     520.0 | 102.5% |     523.4 |   0.7% |      525.3 |   0.4% |    2053.3 | 290.9% |     714.1 | -65.2% |
|   256 |  4 |     241.9 |     526.4 | 117.6% |     527.3 |   0.2% |      508.5 |  -3.6% |    1966.5 | 286.7% |     745.4 | -62.1% |
|   256 |  8 |     247.1 |     514.9 | 108.4% |     507.4 |  -1.5% |      511.5 |   0.8% |    1756.3 | 243.4% |     595.4 | -66.1% |
|   256 | 16 |     240.5 |     515.0 | 114.2% |     509.3 |  -1.1% |      496.3 |  -2.6% |    1524.7 | 207.2% |     724.8 | -52.5% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|   512 |  1 |     377.5 |     642.6 |  70.2% |     619.1 |  -3.7% |      629.9 |   1.7% |    3328.9 | 428.5% |     919.9 | -72.4% |
|   512 |  2 |     376.7 |     630.7 |  67.4% |     620.5 |  -1.6% |      633.7 |   2.1% |    3295.1 | 420.0% |     883.2 | -73.2% |
|   512 |  4 |     359.4 |     634.7 |  76.6% |     608.4 |  -4.1% |      605.9 |  -0.4% |    2359.9 | 289.5% |     877.2 | -62.8% |
|   512 |  8 |     347.4 |     610.1 |  75.6% |     591.7 |  -3.0% |      571.9 |  -3.3% |    1637.4 | 186.3% |     881.4 | -46.2% |
|   512 | 16 |     341.6 |     609.5 |  78.5% |     599.0 |  -1.7% |      577.6 |  -3.6% |    1840.1 | 218.6% |     840.5 | -54.3% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  1024 |  1 |     443.5 |     698.6 |  57.5% |     657.1 |  -5.9% |      633.0 |  -3.7% |    3045.0 | 381.0% |     875.9 | -71.2% |
|  1024 |  2 |     426.0 |     672.1 |  57.8% |     624.4 |  -7.1% |      633.7 |   1.5% |    2202.9 | 247.6% |     832.9 | -62.2% |
|  1024 |  4 |     422.2 |     692.4 |  64.0% |     639.2 |  -7.7% |      609.9 |  -4.6% |    2040.4 | 234.5% |     883.2 | -56.7% |
|  1024 |  8 |     430.3 |     661.6 |  53.8% |     620.6 |  -6.2% |      620.7 |   0.0% |    1961.5 | 216.0% |     877.6 | -55.3% |
|  1024 | 16 |     425.6 |     659.2 |  54.9% |     615.0 |  -6.7% |      602.1 |  -2.1% |    2003.9 | 232.8% |     870.5 | -56.6% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  2048 |  1 |     511.7 |     701.7 |  37.1% |     658.0 |  -6.2% |      677.7 |   3.0% |    3189.1 | 370.6% |     958.6 | -69.9% |
|  2048 |  2 |     514.8 |     719.8 |  39.8% |     662.7 |  -7.9% |      679.4 |   2.5% |    3192.3 | 369.9% |     966.7 | -69.7% |
|  2048 |  4 |     495.6 |     691.9 |  39.6% |     646.1 |  -6.6% |      653.6 |   1.2% |    2411.2 | 268.9% |     956.5 | -60.3% |
|  2048 |  8 |     509.0 |     686.8 |  34.9% |     635.7 |  -7.4% |      639.5 |   0.6% |    1837.7 | 187.3% |     939.4 | -48.9% |
|  2048 | 16 |     495.8 |     672.9 |  35.7% |     630.4 |  -6.3% |      632.0 |   0.2% |    1864.0 | 195.0% |     915.5 | -50.9% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  4096 |  1 |     552.6 |     733.7 |  32.8% |     678.6 |  -7.5% |      692.8 |   2.1% |    3654.5 | 427.5% |     964.6 | -73.6% |
|  4096 |  2 |     536.5 |     708.8 |  32.1% |     683.7 |  -3.5% |      665.5 |  -2.7% |    2798.0 | 320.4% |     924.6 | -67.0% |
|  4096 |  4 |     552.4 |     708.2 |  28.2% |     670.7 |  -5.3% |      672.7 |   0.3% |    2307.0 | 242.9% |     953.5 | -58.7% |
|  4096 |  8 |     558.5 |     707.2 |  26.6% |     654.6 |  -7.4% |      659.2 |   0.7% |    2753.1 | 317.7% |     949.0 | -65.5% |
|  4096 | 16 |     550.5 |     693.8 |  26.0% |     640.5 |  -7.7% |      651.3 |   1.7% |    2170.5 | 233.3% |     924.8 | -57.4% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
|  8192 |  1 |     598.5 |     757.5 |  26.6% |     685.5 |  -9.5% |      689.7 |   0.6% |    4008.1 | 481.1% |     968.1 | -75.8% |
|  8192 |  2 |     596.6 |     703.7 |  17.9% |     641.0 |  -8.9% |      650.9 |   1.6% |    3018.2 | 363.7% |     977.6 | -67.6% |
|  8192 |  4 |     566.3 |     702.0 |  24.0% |     671.3 |  -4.4% |      667.6 |  -0.5% |    2968.7 | 344.7% |     958.2 | -67.7% |
|  8192 |  8 |     570.5 |     697.2 |  22.2% |     636.0 |  -8.8% |      652.9 |   2.7% |    2077.9 | 218.2% |     928.9 | -55.3% |
|  8192 | 16 |     559.7 |     649.9 |  16.1% |     642.7 |  -1.1% |      636.4 |  -1.0% |    2191.7 | 244.4% |     900.0 | -58.9% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 16384 |  1 |     555.1 |     753.0 |  35.6% |     685.3 |  -9.0% |      682.8 |  -0.4% |    4090.3 | 499.1% |     941.5 | -77.0% |
| 16384 |  2 |     594.7 |     736.3 |  23.8% |     641.7 | -12.8% |      646.7 |   0.8% |    2999.6 | 363.8% |     936.4 | -68.8% |
| 16384 |  4 |     588.0 |     699.8 |  19.0% |     656.6 |  -6.2% |      654.9 |  -0.3% |    3248.9 | 396.1% |     889.1 | -72.6% |
| 16384 |  8 |     567.7 |     655.4 |  15.5% |     663.6 |   1.2% |      687.4 |   3.6% |    3228.0 | 369.6% |     944.7 | -70.7% |
| 16384 | 16 |     580.7 |     688.4 |  18.6% |     637.8 |  -7.3% |      659.5 |   3.4% |    2832.1 | 329.4% |     905.7 | -68.0% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 32768 |  1 |     608.5 |     756.5 |  24.3% |     688.3 |  -9.0% |      696.2 |   1.1% |    4205.7 | 504.1% |     970.2 | -76.9% |
| 32768 |  2 |     572.3 |     673.8 |  17.7% |     608.9 |  -9.6% |      636.8 |   4.6% |    4115.2 | 546.3% |     936.2 | -77.3% |
| 32768 |  4 |     596.3 |     661.1 |  10.9% |     610.2 |  -7.7% |      667.4 |   9.4% |    2508.9 | 275.9% |     952.5 | -62.0% |
| 32768 |  8 |     605.5 |     687.2 |  13.5% |     624.8 |  -9.1% |      674.0 |   7.9% |    2319.8 | 244.2% |     940.4 | -59.5% |
| 32768 | 16 |     578.2 |     601.1 |   4.0% |     571.4 |  -4.9% |      582.4 |   1.9% |    1657.7 | 184.7% |     925.0 | -44.2% |
|  bpc  | #T ||      Zip ||     ZipC | % diff || PureJava | % diff || PureJavaC | % diff ||   Native | % diff ||  NativeC | % diff |
| 65536 |  1 |     625.1 |     761.1 |  21.7% |     690.4 |  -9.3% |      702.1 |   1.7% |    4226.6 | 502.0% |     973.7 | -77.0% |
| 65536 |  2 |     582.1 |     691.2 |  18.7% |     623.4 |  -9.8% |      640.3 |   2.7% |    3075.8 | 380.4% |     934.2 | -69.6% |
| 65536 |  4 |     539.3 |     669.7 |  24.2% |     635.1 |  -5.2% |      567.9 | -10.6% |    1345.2 | 136.9% |     887.6 | -34.0% |
| 65536 |  8 |     588.4 |     633.4 |   7.7% |     533.5 | -15.8% |      587.8 |  10.2% |    1954.7 | 232.5% |     934.8 | -52.2% |
| 65536 | 16 |     598.0 |     642.9 |   7.5% |     591.6 |  -8.0% |      558.0 |  -5.7% |    2414.0 | 332.6% |     926.3 | -61.6% |
Elapsed 509.6s
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  08:39 min

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?

…etection Co-authored-by: gong-flying <[email protected]>

hadoop-yetus · 2025-10-13T19:25:47Z

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	23m 29s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+1 💚	mvninstall	47m 25s		trunk passed
+1 💚	compile	14m 16s		trunk passed
+1 💚	mvnsite	2m 32s		trunk passed
+1 💚	shadedclient	101m 41s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 10s		the patch passed
+1 💚	compile	13m 15s		the patch passed
+1 💚	cc	13m 15s		the patch passed
+1 💚	golang	13m 15s		the patch passed
+1 💚	javac	13m 15s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	2m 29s		the patch passed
+1 💚	shadedclient	39m 47s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	23m 25s		hadoop-common in the patch passed.
+1 💚	asflicense	1m 57s		The patch does not generate ASF License warnings.
		206m 55s

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git revision	trunk / `0e62b04`
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PeterPtroc · 2025-10-14T12:08:30Z

@steveloughran could you please review this PR if you have time? thanks!

PeterPtroc · 2025-11-03T01:52:46Z

Hi @pan3793 @slfan1989 , could you please take a look when you have a moment? Happy to address any feedback. Thanks!

steveloughran · 2025-11-05T21:32:07Z

Is everyone with a risc-v setup able to test this?

slfan1989 · 2025-11-10T05:55:30Z

Hi @pan3793 @slfan1989 , could you please take a look when you have a moment? Happy to address any feedback. Thanks!

@PeterPtroc Thank you for your contribution! However, RISC-V is beyond my current knowledge, and I’m sorry I’m unable to assist with reviewing this part of the code. I recommend reaching out to other team members for assistance with the review.

pan3793 · 2025-11-10T06:04:44Z

Is everyone with a risc-v setup able to test this?

to reviewers, #7924 may help you to set up a dev box on x86 or aarch platform by leveraging Docker & QEMU to simulate riscv env, but it's super super slow, either has no means of performance evaluation.

steveloughran

ok, I've tried to review this and asked google gemini to look at specific aspects (alignment, assembly, pointer). It's happy "Yes, the RISC-V assembly code in this pull request looks excellent. It is correct, safe, and follows modern best practices for inline assembly.". If I hadn't been arguing with it and latex citations all afternoon I'd treat its opinions as valid. But here they are as good as my judgement.

I propose adding a comment on each method so that whoever reads this code next understands what it tries to do. Same for the processing of the misaligned data at the start of an operation, and any leftovers.

that's all: explain things for future developers.

+1 pending these changes

...p-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32_riscv.c

leiwen2025 · 2025-11-19T01:52:59Z

Hi @PeterPtroc ,
I received a suggestion on my PR to collaborate with you on optimizing the CRC32-related design for better performance.
I’m happy to work together — maybe we can review each other’s approaches and align on a combined solution that provides the best CRC32 performance.

steveloughran · 2025-11-21T15:07:27Z

@PeterPtroc as noted, @leiwen2025 can help here.

@leiwen2025 -can you look at this PR as is and review it. Ideally: check it out and do a -Pnative build running the native tests.

If you two are using different instructions, how do they differ.

Having just looked at what clmul/clmulh does, I can see why it offers benefits

how common is the instruction?
@leiwen2025 how does your vectorized compare? This opcode is intended to be pipelined and the opcode is designed for these kind of encryption/checksum algorithms.

Looking at #7912 it's calling vclmul.vv -this is generally going to be faster, isn't it?

Which means that while the code is more complex, ultimately it's going be the best option on cores with the right feature flaggs.

This makes me think that this one can go in but the vector one goes in as the followup, with the choice of operation dependent on feature, with priority of: vclmul, cmul, classic.

leiwen2025 · 2025-11-24T12:01:24Z

@PeterPtroc as noted, @leiwen2025 can help here.

@leiwen2025 -can you look at this PR as is and review it. Ideally: check it out and do a -Pnative build running the native tests.

If you two are using different instructions, how do they differ.

Having just looked at what clmul/clmulh does, I can see why it offers benefits

how common is the instruction?

@leiwen2025 how does your vectorized compare? This opcode is intended to be pipelined and the opcode is designed for these kind of encryption/checksum algorithms.

Looking at #7912 it's calling vclmul.vv -this is generally going to be faster, isn't it?

Which means that while the code is more complex, ultimately it's going be the best option on cores with the right feature flaggs.

This makes me think that this one can go in but the vector one goes in as the followup, with the choice of operation dependent on feature, with priority of: vclmul, cmul, classic.

@steveloughran Thanks! I’m happy to help. I’ll check out the PR as-is and run a -Pnative build with the native tests to verify. Will report back once I have the results.

leiwen2025 · 2025-12-05T06:30:58Z

@PeterPtroc as noted, @leiwen2025 can help here.

@leiwen2025 -can you look at this PR as is and review it. Ideally: check it out and do a -Pnative build running the native tests.

If you two are using different instructions, how do they differ.

Having just looked at what clmul/clmulh does, I can see why it offers benefits

how common is the instruction?

@leiwen2025 how does your vectorized compare? This opcode is intended to be pipelined and the opcode is designed for these kind of encryption/checksum algorithms.

Looking at #7912 it's calling vclmul.vv -this is generally going to be faster, isn't it?

Which means that while the code is more complex, ultimately it's going be the best option on cores with the right feature flaggs.

This makes me think that this one can go in but the vector one goes in as the followup, with the choice of operation dependent on feature, with priority of: vclmul, cmul, classic.

Hi @steveloughran, I have completed the native tests, and the results are consistent with the data shown in the PR. Should I display the data?

Co-authored-by: gong-flying <[email protected]>

PeterPtroc · 2025-12-26T09:57:45Z

sorry for the late reply.
I completely agree with the suggested approach: merging the Zbc/Zbkc scalar-based CRC32C acceleration first, followed by the vector (V + Zvbc) version. This aligns perfectly with my current plan.

I am also excited to collaborate with @leiwen2025 in the next phase to integrate the vectorized solution. Our goal is to implement a multi-tiered optimization strategy: vclmul > clmul > software.

The decision to prioritize the scalar (Zbc/Zbkc) implementation is based on several key factors:

Broader Hardware Availability: Zbc is part of the RISC-V scalar cryptography extension and is already supported by many mainstream chips (e.g., SiFive P/U series, T-Head C9xx). The Vector extension (V) and Zvbc are currently limited to newer high-end or experimental hardware, so the scalar version provides immediate benefits to a larger user base.
Ease of Verification and Maintenance: The scalar implementation is logically simpler, making it easier to review, test, and debug. Vectorization introduces complexities like memory alignment and register scheduling, which are better handled as a dedicated follow-up optimization.
Progressive Evolution & Robust Fallback: Establishing a solid scalar path first allows us to build a robust fallback mechanism (vclmul → clmul → software). This ensures that Hadoop can run efficiently across the diverse RISC-V hardware ecosystem.

I will update the PR with the requested comments and documentation from @steveloughran shortly to ensure the implementation is well-explained for future developers.

hadoop-yetus · 2025-12-26T13:38:07Z

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	24m 33s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+1 💚	mvninstall	47m 17s		trunk passed
+1 💚	compile	16m 57s		trunk passed
+1 💚	mvnsite	2m 45s		trunk passed
+1 💚	shadedclient	105m 9s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 13s		the patch passed
+1 💚	compile	16m 8s		the patch passed
+1 💚	cc	16m 8s		the patch passed
+1 💚	golang	16m 8s		the patch passed
+1 💚	javac	16m 8s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	2m 42s		the patch passed
+1 💚	shadedclient	41m 1s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	23m 45s		hadoop-common in the patch passed.
+1 💚	asflicense	2m 9s		The patch does not generate ASF License warnings.
		216m 46s

Subsystem	Report/Notes
Docker	ClientAPI=1.52 ServerAPI=1.52 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8031/2/artifact/out/Dockerfile
GITHUB PR	#8031
Optional Tests	dupname asflicense compile cc mvnsite javac unit codespell detsecrets golang
uname	Linux df771ca26052 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / `f34e1b6`
Default Java	Red Hat, Inc.-1.8.0_472-b08
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8031/2/testReport/
Max. process+thread count	3150 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8031/2/console
versions	git=2.43.7 maven=3.9.11
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HADOOP-19724. [RISC-V] Add rv64 Zbc (CLMUL) bulk CRC32 with runtime d…

0e62b04

…etection Co-authored-by: gong-flying <[email protected]>

github-actions bot added trunk Common Native labels Oct 13, 2025

steveloughran requested changes Nov 10, 2025

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leiwen2025 mentioned this pull request Nov 11, 2025

HADOOP-19666. Add hardware-accelerated CRC32 support for riscv64 using the v,zbc,zvbc extension #7912

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f34e1b6

Co-authored-by: gong-flying <[email protected]>

PeterPtroc requested a review from steveloughran December 26, 2025 10:05

HADOOP-19724. [RISC-V] Add rv64 Zbc (CLMUL) bulk CRC32 (CRC32C not optimized) #8031

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HADOOP-19724. [RISC-V] Add rv64 Zbc (CLMUL) bulk CRC32 (CRC32C not optimized) #8031

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PeterPtroc commented Oct 13, 2025

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