Mert Efe Sensoy
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open-source

All 8 posts tagged open-source, newest first. Cited technical writing on quantum computing, IBM Z modernization and open hardware.

8 posts

A Mutation Round That Reads the Exit Code Scores a Suite That Never Started as a Kill

Ephesus scored mutants by vitest's exit code until runs that executed zero tests counted as kills. How its checked-in round reads the report instead.

7 min readtestinggitopen-source

Record a Calibration Capture Rate Before the Backfill Erases It

An archive of IBM calibration data missed 27 of 227 documents in a week. Why the figure had to be pinned before the backfill, and its cost in device states.

5 min readquantum-computingIBM Quantumopen-source

CICS Never Starts an OpenTelemetry Trace, So the Caller's Sampler Sets Its Span Volume

CICS TS 6.3 writes an OpenTelemetry span only when the caller's sampled flag is set, and cannot change it. Find out who owns your SMF 1159 volume.

4 min readIBM Zmainframe-modernizationopen-source

git commit Exits While Its Own Repack Is Still Writing .git

On Linux and macOS, git commit hands its housekeeping to a detached process. How Ephesus caught it in a CI teardown, the two-flag fix, and what it costs.

5 min readgittestingopen-source

Nineteen Matching Fingerprints Missed a Compiler Bug on MVS

FlyBatch's CRC-32 fingerprints all matched on MVS while GCCMVS turned its kernel's zero constant into a subnormal. Why the check was blind, and what caught it.

5 min readMVSC89floating-pointopen-source

Zowe's Single-Service API ML Changes What Your AT-TLS Jobname Rules Match

New Zowe 3.4 installs run API ML as one address space, ZWE1AG: which AT-TLS rules that widens, which it breaks, and the suffix one Zowe page gets wrong.

5 min readIBM Zmainframe-modernizationopen-source

A Noise Engine That Installs Zero Qiskit Aer Errors Still Returns Successfully

Eligibility derived from IBM calibration gate lengths stopped noise landing on zero-duration rz gates and left an uncompiled circuit with an empty noise model.

5 min readquantum-computingQiskitIBM Quantumopen-source

Designing a DDR4 UDIMM from Scratch: Lessons from the Open Memory Initiative

A look inside the Open Memory Initiative's approach to building an open-source DDR4 UDIMM reference design, from architecture decisions to signal integrity.

4 min readhardwareDDR4open-sourcesignal-integrity
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