zymtrace Changelog

v25.11.5

profiler: fix bug that caused GPU implant instrumentation to not work when profiler runs in docker container

profiler: support zing 25.01 with JDK 11 and 17 (21 was already supported)
symblib: fix Rust function name demangling which failed in some cases
mcp: suggest using local time instead of UTC
profiler: reduce allocations in parseFDE()
- brings parseFDE down from 60% of all allocs to 0.3%
mcp: enable collapse_go_system_frames, collapse_jvm_threads, filter_error_events, filter_unreported to reduce number of tokens in the flamegraph response
ui: add new display option collapse_go_system_frames
- default enabled and inverted in UI: "Show Go system frames"
- aggregates GC frames into "Garbage Collector"
- aggregates scheduler frames into "Scheduler"
ui: fix frame filter for java standard library functions
- it was previously filtering out functions too aggressively
profiler: improve zing symbolization
- adds support for the GC in zing, leading to more debug information being resolved, and thus deeper / longer stack traces
profiler: place uprobes on GPU implant dynamically
- implant is now detected and instrumented regardless of its path
cudaprofiler: several improvements
- improve flushing of CUPTI activity records
- don't delay process synchronizations during startup for CUDA processes, leading to better CPU stack traces for the first few frames
- support building with CUDA 13
- allow to bypass GPU presence checks in profiler

mcp: change flamegraph culling to root-based culling as in the UI
ui: new display option 'filter_error_frames'
- filters error frames by default, thus allows the profiler to send error frames by default to improve CPU usage accuracy
all: add oidc/local auth support along with service tokens

profiler: increase the maximum number of unwound frames from 128 to 256
- this avoids unwind errors with long stack traces and thus improves CPU attribution
profiler: improve log message when falling back from BTF to binary analysis
profiler: print out system info if attaching to tracepoints fails
mcp: add topentities as tool, resource and resource template

profiler: reworked PID reporting mechanism, significantly reducing CPU usage
- Especially high impact on systems that spawn many short-lived processes
profiler: prefer DWARF symbols over Go symbols during automatic symbol upload
- Improves symbol quality for Go executables with DWARF debug info when running the profiler with -dwarf argument
profiler: more efficient stack delta extraction for native executables
- Significantly reduces the peak memory usage of the profiler in the presence of large native executables
ui: add new display option collapse_jvm_threads
- aggregates GC threads into "Garbage Collector" (see with grouped by "Thread Name" in the flamegraph)
- aggregates all GC frames into a single one called "Garbage Collector"
- also aggregates JVM JIT frames and threads in the same fashion
- turned on by default

ui: switch to relative mode if matches is used on column incompatible with absolute mode

profiler: fixed an issue that prevented the script name attribute to be set for GPU traces
ui: support matches for regex matches in advanced query mode