| Message ID | 20190720010235.32444-1-vandersonmr2@gmail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Measure Tiny Code Generation Quality | expand |
vandersonmr <vandersonmr2@gmail.com> writes: > This patch is part of Google Summer of Code (GSoC) 2019. > More about the project can be found in: > https://wiki.qemu.org/Internships/ProjectIdeas/TCGCodeQuality > > The goal of this patch is to add infrastructure to collect > execution and JIT statistics during the emulation with accel/TCG. > The statistics are stored in TBStatistic structures (TBStats) > with each TB having its respective TBStats. > > We added -d tb_stats and HMP tb_stats commands to allow the control > of this statistics collection. And info tb, tbs, and coverset commands > were also added to allow dumping and exploring all this information > while emulating. Hmm with: -d tb_stats:10:all I'm seeing the following bt: Thread 4 "qemu-system-aar" received signal SIGABRT, Aborted. [Switching to Thread 0x7fffe5285700 (LWP 898)] __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50 50 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) bt #0 0x00007ffff51787bb in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50 #1 0x00007ffff5163535 in __GI_abort () at abort.c:79 #2 0x0000555555bab663 in OP_E (bytemode=2, sizeflag=3) at /home/alex/lsrc/qemu.git/disas/i386.c:5094 #3 0x0000555555ba972f in print_insn (pc=140735911299712, info=0x7fffe5281c00) at /home/alex/lsrc/qemu.git/disas/i386.c:4071 #4 0x0000555555ba8623 in print_insn_i386 (pc=140735911299712, info=0x7fffe5281c00) at /home/alex/lsrc/qemu.git/disas/i386.c:3705 #5 0x0000555555881241 in get_num_insts (code=0x7fffa2000a80 <code_gen_buffer+33557075>, size=88) at /home/alex/lsrc/qemu.git/disas.c:575 #6 0x00005555558d89f1 in tb_gen_code (cpu=0x555556a1f6a0, pc=18446743524230025728, cs_base=0, flags=2415924229, cflags=-16252928) at /home/alex/lsrc/qemu.git/accel/tcg/translate-all.c:1881 #7 0x00005555558d4984 in tb_find (cpu=0x555556a1f6a0, last_tb=0x0, tb_exit=0, cf_mask=524288) at /home/alex/lsrc/qemu.git/accel/tcg/cpu-exec.c:409 #8 0x00005555558d524f in cpu_exec (cpu=0x555556a1f6a0) at /home/alex/lsrc/qemu.git/accel/tcg/cpu-exec.c:731 #9 0x0000555555884806 in tcg_cpu_exec (cpu=0x555556a1f6a0) at /home/alex/lsrc/qemu.git/cpus.c:1435 #10 0x000055555588505c in qemu_tcg_cpu_thread_fn (arg=0x555556a1f6a0) at /home/alex/lsrc/qemu.git/cpus.c:1743 #11 0x0000555556010875 in qemu_thread_start (args=0x555556a75450) at /home/alex/lsrc/qemu.git/util/qemu-thread-posix.c:502 #12 0x00007ffff530bfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486 #13 0x00007ffff523a4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 > > Collecting these statistics and information is useful to understand > qemu performance and to help to add the support for traces to QEMU. > > vandersonmr (7): > accel: introducing TBStatistics structure > accel: collecting TB execution count > accel: collecting JIT statistics > accel: replacing part of CONFIG_PROFILER with TBStats > log: adding -d tb_stats to control tbstats > monitor: adding tb_stats hmp command > monitor: adding info tbs, tb, and coverset > > accel/tcg/Makefile.objs | 2 +- > accel/tcg/tb-stats.c | 489 +++++++++++++++++++++++++++++++++++ > accel/tcg/tcg-runtime.c | 7 + > accel/tcg/tcg-runtime.h | 2 + > accel/tcg/translate-all.c | 93 ++++++- > accel/tcg/translator.c | 6 + > disas.c | 108 ++++++++ > hmp-commands-info.hx | 23 ++ > hmp-commands.hx | 17 ++ > include/disas/disas.h | 1 + > include/exec/exec-all.h | 15 +- > include/exec/gen-icount.h | 9 + > include/exec/tb-context.h | 12 + > include/exec/tb-hash.h | 7 + > include/exec/tb-stats.h | 113 ++++++++ > include/qemu/log-for-trace.h | 2 + > include/qemu/log.h | 16 ++ > linux-user/exit.c | 4 + > monitor/misc.c | 111 ++++++++ > tcg/tcg.c | 114 +++----- > tcg/tcg.h | 12 +- > util/log.c | 99 ++++++- > 22 files changed, 1144 insertions(+), 118 deletions(-) > create mode 100644 accel/tcg/tb-stats.c > create mode 100644 include/exec/tb-stats.h -- Alex Bennée