perf tests: Fix Python JIT dump profiling test failure

The `python profiling with jitdump` test failed due to:
1. Target PID extraction resolving to duplicate space-separated values,
   which broke the buildid-cache loops.
2. The default workload duration being too short to capture JIT stack
   trampoline samples, resulting in 0 matching JIT symbols.

Fix the PID parsing by sorting and retrieving a unique single-line value.
Implement a robust retry loop starting at 1M python loop iterations and
scaling up to 100M iterations until JIT symbols are successfully captured
and verified.

Fixes: c9cd0c7e529e ("perf test: Add python JIT dump test")
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

0 files changed, 0 insertions, 0 deletions