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Andrea Mazzoleni 2025-10-14 23:30:11 +02:00
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@ -1111,51 +1111,51 @@ For low-end CPUs without SSE, a special, incompatible triple-parity option is av
See 'z-parity' in the manual for details.
</p>
<p>
The following results are from a Core i5-4670K @ 3.4 GHz.
The following results are from a Intel Core i7-10700 CPU @ 2.90GHz.
Check your values with the -T option:
</p>
<pre>
root@redstar:/root# snapraid -T
snapraid v7.0 by Andrea Mazzoleni, http://www.snapraid.it
Compiler gcc 4.8.1
CPU GenuineIntel, family 6, model 60, flags mmx sse2 ssse3 sse42 avx2
snapraid v13.0 by Andrea Mazzoleni, http://www.snapraid.it
Compiler gcc 15.2.0
CPU GenuineIntel, family 6, model 165, flags sse2 ssse3 crc32 avx2
Memory is little-endian 64-bit
Support nanosecond timestamps with futimens()
Speed test using 8 data buffers of 262144 bytes, for a total of 2048 KiB.
Memory blocks have a displacement of 1792 bytes to improve cache performance.
The reported values are the aggregate bandwidth of all data blocks in MiB/s,
The reported values are the aggregate bandwidth of all data blocks in MB/s,
not counting parity blocks.
Memory write speed using the C memset() function:
memset 22233
memset 61914
CRC used to check the content file integrity:
table 1261
intel 9306
table 1866
intel 12741
Hash used to check the data blocks integrity:
best murmur3 spooky2
hash spooky2 4715 14684
best murmur3 spooky2 metro
hash spooky2 6285 17813 20684
RAID functions used for computing the parity with 'sync':
best int8 int32 int64 sse2 sse2e ssse3 ssse3e avx2 avx2e
gen1 avx2 13339 25438 45438 50588
gen2 avx2 4115 6514 19441 21840 32201
genz avx2e 2337 2874 9803 10920 18944
gen3 avx2e 814 8934 10154 18613
gen4 avx2e 620 6204 7569 14229
gen5 avx2e 496 4777 5149 10051
gen6 avx2e 413 3846 4239 8190
gen1 avx2 24995 46562 62683 77069
gen2 avx2 8243 15879 25788 27292 44907
genz avx2e 5509 10588 14485 13920 25175
gen3 avx2e 1190 13201 14307 27268
gen4 avx2e 914 10061 11006 21328
gen5 avx2e 746 7970 8828 17040
gen6 avx2e 630 6627 7516 14584
RAID functions used for recovering with 'fix':
best int8 ssse3 avx2
rec1 avx2 1158 2916 3019
rec2 avx2 517 1220 1633
rec3 avx2 110 611 951
rec4 avx2 71 395 631
rec5 avx2 49 264 421
rec6 avx2 36 194 316
rec1 avx2 1626 3949 4331
rec2 avx2 709 1738 2231
rec3 avx2 170 922 1414
rec4 avx2 110 614 981
rec5 avx2 79 426 705
rec6 avx2 58 316 539
</pre>
<h2>Known Problems</h2>