Modern cloud data centers consolidate diverse applications on shared hosts, where resource contention among co-located applications generates cross-application interference that degrades performance and compromises quality of service. IntP, a system-level interference profiler introduced in 2022, addresses this by combining kernel instrumentation and hardware performance counters into a seven-metric interference fingerprint per application, enabling interference-aware consolidation. Its original implementation, however, relies on kernel and hardware interfaces that are no longer compatible with modern Linux systems. This paper presents a modernization of IntP across multiple instrumentation substrates, improving portability across Linux kernel generations and instrumentation ABIs while preserving measurement fidelity and maintaining low overhead. We redesigned the profiling infrastructure of the original SystemTap version around state-of-the-art instrumentation mechanisms and compared it with two modern versions: a portable C version on stable userspace interfaces and an eBPF/CO-RE version. Experimental results show that the two modern versions reproduce the legacy interference fingerprint while improving portability, reliability, and measurement fidelity, within a ±3% overhead envelope on CPU- and memory-bound reference loads. Our evaluation also characterizes the portability, overhead, and fidelity trade-offs across these substrates, providing substrate-aware deployment guidance.