timestamp_utc=20260913-012750
scope=#88 acceptance measurement: record-path cost of unified unconditional ERR_set_mark/ERR_pop_to_mark (candidate) vs no queue guard (baseline)
classification=LOCAL within-host acceptance measurement; NOT an EC2 production comparison
baseline_revision=ba4a10f67045b829a8f18be7ae716c7dcb61bfb0
baseline_dirty=false
candidate_revision=da799269498a02a4befc25da90ba01865070cf78
candidate_dirty=false
crypto_backend=openssl
openssl_version=OpenSSL 3.6.4 25 Aug 2026 (Library: OpenSSL 3.6.4 25 Aug 2026)
libcrypto_path=/nix/store/HASH-openssl-3.6.4/lib/libcrypto.so.3
libcrypto_sha256=56f4369cd7d5c441363a8f3678b5463f457744035e4fadf93ca416ffccfed79a
zig_version=0.15.2
optimize=ReleaseFast
target_cpu=apple_m1 (build.zig native-aarch64 workaround)
baseline_binary_sha256=a97c1fd4a839ecc1f3b79979c84e41feda2f4c0c82ad74fdbe9c207e18d81401
candidate_binary_sha256=b04751976c9609f2e29da67dbf40a9f7d9ecc62785d4e5b2aad1ac81a2d240d9
kernel=7.2.3
uname=Linux launchpad 7.2.3 #1-NixOS SMP PREEMPT Wed Sep  2 12:33:21 UTC 2026 aarch64 GNU/Linux
perf_event_paranoid=2
pin_command=taskset -c 3
wall_rounds=6 (ABBA alternation), count=5 samples/row/invocation, benchtime=300ms
instr_iters: size16=4000000x size1350=300000x size16384=30000x, 3 reps, alternating
[lscpu]
Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  4
On-line CPU(s) list:                     0-3
Vendor ID:                               ARM
Model name:                              Neoverse-V3
Model:                                   1
Thread(s) per core:                      1
Core(s) per socket:                      4
Socket(s):                               1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti ecv afp wfxt
L1d cache:                               256 KiB (4 instances)
L1i cache:                               256 KiB (4 instances)
L2 cache:                                8 MiB (4 instances)
L3 cache:                                48 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-3
Vulnerability Gather data sampling:      Not affected
Vulnerability Ghostwrite:                Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Old microcode:             Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected
