https://bugs.kde.org/show_bug.cgi?id=497432
Bug ID: 497432
Summary: Feature Request: Automated Snapshot Generation in
Callgrind on Process Termination
Classification: Developer tools
Product: valgrind
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: callgrind
Assignee: josef.weidendor...@gmx.de
Reporter: ekas...@live.com
Target Milestone: ---
Dear Valgrind Development Team,
I hope this message finds you well. I am a frequent user of Callgrind for
performance profiling and greatly appreciate the tool’s flexibility and
robustness. However, I have encountered a scenario where I believe a new
feature could significantly enhance its usability.
Proposed Feature:
I propose adding an optional capability for Callgrind to automatically save a
snapshot of profiling data upon the monitored process’s termination (normal or
abnormal). This feature could be controlled via a command-line option or
environment variable, such as --auto-dump-on-exit, and applied selectively
using existing NPID control mechanisms.
Use Case:
In workflows where applications may terminate unexpectedly (e.g., due to
crashes or external signals), the current manual invocation of
CALLGRIND_DUMP_STATS can result in missed profiling opportunities. Automating
this step would ensure critical profiling data is captured without requiring
changes to the application code or extensive wrapper scripts.
Feasibility:
Given that Callgrind already supports NPID-based control, implementing this
feature seems feasible by extending its termination handling logic. Users could
opt-in to this behavior only for specific processes of interest to avoid
unnecessary data generation.
Benefits:
-Ensures profiling data is not lost due to unforeseen process terminations.
-Reduces the need for custom instrumentation or external monitoring scripts.
-Enhances user control while maintaining Callgrind’s efficiency.
I would be happy to discuss this further or provide additional examples and use
cases. If this feature aligns with the tool’s development goals.
Thank you for considering this request, and I look forward to your feedback.
Best regards,
Elie
Expert Performance Test Engineer
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