Bug #7006
Updated by Victor Julien 5 months ago
Doing some experiments with benchmarking content inspection. To establish a baseline, first did some "raw" SPM scans. Our SPM_BM appears to dramatically underperform vs Hyperscan, but also against a simple @strstr@ check for the same data+patterns:
<pre>
0000 61 62 63 64 65 66 67 68 69 6A 6B 78 78 78 78 78 abcdefgh ijkxxxxx
0010 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0020 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0030 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0040 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0050 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0060 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0070 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0080 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0090 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
00A0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
00B0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
00C0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
00D0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
00E0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
00F0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0100 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0110 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0120 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0130 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0140 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0150 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0160 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0170 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0180 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0190 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
01A0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
01B0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
01C0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
01D0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
01E0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
01F0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0200 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0210 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0220 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0230 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0240 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0250 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0260 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0270 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0280 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0290 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
02A0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
02B0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
02C0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
02D0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
02E0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
02F0 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 xxxxxxxx xxxxxxxx
0300 78 78 78 78 78 78 78 78 78 78 78 78 78 6C 6D 6E xxxxxxxx xxxxxlmn
0310 6F 70 71 72 73 74 75 76 77 78 79 7A opqrstuv wxyz
SPM baseline (spm strstr):
Pattern: abc : bytes/s: 115362318000, PPS 144927000, Gbps: 880144.625, MiB/s: 110018
Pattern: abcdef : bytes/s: 54896551000, PPS 68965000, Gbps: 418827.438, MiB/s: 52353
Pattern: xyz : bytes/s: 1997991000, PPS 2510000, Gbps: 15243.469, MiB/s: 1905
Pattern: uvwxyz : bytes/s: 47100591000, PPS 59171000, Gbps: 359349.000, MiB/s: 44918
Pattern: abcdefxyz : bytes/s: 7282708000, PPS 9149000, Gbps: 55562.652, MiB/s: 6945
SPM baseline (spm bm):
Pattern: abc : bytes/s: 53066666000, PPS 66666000, Gbps: 404866.531, MiB/s: 50608
Pattern: abcdef : bytes/s: 38829268000, PPS 48780000, Gbps: 296243.812, MiB/s: 37030
Pattern: xyz : bytes/s: 299450000, PPS 376000, Gbps: 2284.628, MiB/s: 285
Pattern: uvwxyz : bytes/s: 301881000, PPS 379000, Gbps: 2303.170, MiB/s: 287
Pattern: abcdefxyz : bytes/s: 297859000, PPS 374000, Gbps: 2272.489, MiB/s: 284
SPM baseline (spm hs):
Pattern: abc : bytes/s: 18952380000, PPS 23809000, Gbps: 144595.188, MiB/s: 18074
Pattern: abcdef : bytes/s: 18383371000, PPS 23094000, Gbps: 140254.000, MiB/s: 17531
Pattern: xyz : bytes/s: 12115677000, PPS 15220000, Gbps: 92435.281, MiB/s: 11554
Pattern: uvwxyz : bytes/s: 9742962000, PPS 12239000, Gbps: 74332.898, MiB/s: 9291
Pattern: abcdefxyz : bytes/s: 12880258000, PPS 16181000, Gbps: 98268.578, MiB/s: 12283
</pre>
The 3 last patterns scan the entire buffer, as the patterns are either the buffer's end, or not present. It appears that in this scenario the code isn't performing.