[PING^2] [PATCH v2 0/7] gdb.perf/: Add JIT performance test

[Ilya Leoshkevich via Gdb-patches <gdb-patches@sourceware.org>]

On Tue, 2022-05-31 at 00:11 +0200, Ilya Leoshkevich wrote:
> Hi,
> 
> This series implements a JIT performance test as discussed in [1].
> Patch 1 is a small fix, patches 2-6 are preparations and patch 7 is
> the test itself.
> 
> ChangeLog:
> v1: https://sourceware.org/pipermail/gdb-patches/2022-May/189427.html
> v1 -> v2:
> * Make sure shared objects contain virtual addresses they are loaded
>   at by reusing parts of jit-elf-helpers.exp.  By default, virtual
>   addresses in all shared objects are relative to 0 - this creates a
>   lots of overlaps and forces sort_cmp () to go through the slow
> "Sort
>   on sequence number of the objfile in the chain" path, which is not
> a
>   useful performance testing scenario.
> * Fix DEFAULT_BINARY_LINK_WITH_SHLIBS style (Andrew).
> * Rename SHLIB to TOTAL_NR_SHLIBS (Andrew).
> * Add SOLIB_COUNT (Andrew).
> * Drop "gdb.perf/: Compile the binary with -DSHLIB", it's superseded
> by
>   "Allow adjusting GenPerfTest compile options".
> 
> The test can be used as follows:
> 
> $ make build-perf -j"$(nproc)" RUNTESTFLAGS=jit.exp
> $ make check-perf RUNTESTFLAGS=jit-check.exp GDB_PERFTEST_MODE=run
> 
> The results can be converted to gnuplot-friendly format as follows:
> 
> $ perl -ne 'if (/:register_times:(\d+) (.+)/) { print "$1 $2\n"; }' \
>       <gdb.perf/outputs/jit/pieces/perftest.sum >jit.txt
> 
> I've uploaded the results to [2].  They are similar to the ones from
> Andrew and show that [1] is an improvement.  The third result shown
> on
> the chart is from [3] - with it I can pass the 10k JITed objects mark
> and debug CoreCLR JIT with GDB.  It's still WIP though - the
> testsuite
> shows a couple of failures.
> 
> Best regards,
> Ilya
> 
> [1] https://sourceware.org/pipermail/gdb-patches/2022-May/189341.html
> [2]
> https://github.com/iii-i/binutils-gdb/blob/section-map-20220530-2/gdb/testsuite/jit.png
> [3]
> https://github.com/iii-i/binutils-gdb/commits/section-map-20220530-2
> 
> Ilya Leoshkevich (7):
>   gdb.perf/: Fix tcl_string_list_to_python_list {x}
>   gdb.perf/: Add binary_link_with_shlibs setting to GenPerfTest
>   gdb.perf/: Allow adjusting GenPerfTest compile options
>   gdb.base/: Introduce jit-protocol-util.h
>   gdb.base/: Introduce jit_compile_options
>   gdb.base/: Introduce n_jit_so_address
>   gdb.perf/: Add JIT performance test
> 
>  gdb/testsuite/gdb.base/jit-elf-fork-main.c | 48 ++----------
>  gdb/testsuite/gdb.base/jit-elf-main.c      | 48 ++----------
>  gdb/testsuite/gdb.base/jit-elf-util.h      | 17 +++++
>  gdb/testsuite/gdb.base/jit-protocol-util.h | 74 ++++++++++++++++++
>  gdb/testsuite/gdb.base/jit-reader-host.c   |  8 +-
>  gdb/testsuite/gdb.perf/jit-check.exp       | 25 +++++++
>  gdb/testsuite/gdb.perf/jit-check.py        | 60 +++++++++++++++
>  gdb/testsuite/gdb.perf/jit-solib.c         | 27 +++++++
>  gdb/testsuite/gdb.perf/jit.c               | 87
> ++++++++++++++++++++++
>  gdb/testsuite/gdb.perf/jit.exp             | 79 ++++++++++++++++++++
>  gdb/testsuite/lib/gen-perf-test.exp        | 54 +++++++++++---
>  gdb/testsuite/lib/jit-elf-helpers.exp      | 22 ++++--
>  gdb/testsuite/lib/perftest.exp             |  2 +-
>  13 files changed, 439 insertions(+), 112 deletions(-)
>  create mode 100644 gdb/testsuite/gdb.base/jit-protocol-util.h
>  create mode 100644 gdb/testsuite/gdb.perf/jit-check.exp
>  create mode 100644 gdb/testsuite/gdb.perf/jit-check.py
>  create mode 100644 gdb/testsuite/gdb.perf/jit-solib.c
>  create mode 100644 gdb/testsuite/gdb.perf/jit.c
>  create mode 100644 gdb/testsuite/gdb.perf/jit.exp

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