From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx> This patch set is based on top of: https://lore.kernel.org/all/20230809175340.3066-1-stevie.6strings@xxxxxxxxx/ I added a sample program task-eval which is one of the tools that will be using this library. The first patch adds task-eval but that is still using the old API (defined in trace-analysis.c). The next patches modify the new API to fit with the use case of task-eval. One is to use "pointer" as I'm not sure exactly the usecase of the dynamic structure. The cmp and release callbacks are changed to be more generic, and they get called if they simply exist for a given type. I can imagine wanting a release function for event the most mundane types (like number_32). The cmp was also updated to pass in the traceeval descriptor, as I found that I needed access to it while doing a compare (although, I rewrote the code a bit where that use case isn't in the tool anymore). Some fixes were made to the query. I also did a bit of code restructuring and add the hash and iterator logic. The last patch updates the sample code task-eval.c and has it give pretty much the same logic as the original. That sample could be updated to implement the code consolidation that Ross suggested. I may do that later. Happy programming! Changes since v1: https://lore.kernel.org/all/20230809031313.1298605-1-rostedt@xxxxxxxxxxx/ - Lots! - Converted to using a hash table - Removed the unused compare code. With the other updates, it was taking too much time to keep updating them. - Added checks and labels to the types to have them know what type they are, and index they are at. - Added stat logic - Added iterator logic - Have a working sample with the new code! Steven Rostedt (Google) (17): libtraceeval histograms: Fix traceeval_results_release() error message libtraceeval: Add sample task-eval program libtraceeval hist: Add pointer and const string types libtraceeval histogram: Have cmp and release functions be generic libtraceeval histograms: Add traceeval struct to compare function libtraceeval histogram: Remove comparing of traceeval and types libtraceeval: Convert hist array into a hash table libtraceeval histograms: Move hash functions into their own file libtraceeval histogram: Label and check keys and values libtraceeval histogram: Add updating of stats libtraceeval histogram: Add iterator APIs libtraceeval histogram: Add data copy callback libtraceeval histogram: Do the release on updates libtraceeval histogram: Use stack for old copy in update libtraceeval histogram: Add traceeval_iterator_sort_custom() libtraceeval histogram: Have traceeval_query() just give the pointer to results libtraceeval samples: Update task-eval to use the histogram logic Makefile | 4 +- include/traceeval-hist.h | 110 +++-- include/traceeval-test.h | 16 - samples/Makefile | 29 ++ samples/task-eval.c | 952 +++++++++++++++++++++++++++++++++++++++ src/Makefile | 1 + src/eval-local.h | 123 +++++ src/hash.c | 123 +++++ src/histograms.c | 878 ++++++++++++++++++++++++++---------- 9 files changed, 1952 insertions(+), 284 deletions(-) delete mode 100644 include/traceeval-test.h create mode 100644 samples/Makefile create mode 100644 samples/task-eval.c create mode 100644 src/eval-local.h create mode 100644 src/hash.c -- 2.40.1