motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-08 10:13:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

tcg: distribute profiling counters across TCGContext's

Browse source 
This is groundwork for supporting multiple TCG contexts.

To avoid scalability issues when profiling info is enabled, this patch
makes the profiling info counters distributed via the following changes:

1) Consolidate profile info into its own struct, TCGProfile, which
   TCGContext also includes. Note that tcg_table_op_count is brought
   into TCGProfile after dropping the tcg_ prefix.
2) Iterate over the TCG contexts in the system to obtain the total counts.

This change also requires updating the accessors to TCGProfile fields to
use atomic_read/set whenever there may be conflicting accesses (as defined
in C11) to them.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Emilio G. Cota 2017-07-05 19:35:06 -04:00 • committed by Richard Henderson
parent df2cce2968
commit c3fac1138e
3 changed files with 126 additions and 45 deletions
Download patch file Download diff file Expand all files Collapse all files

23
accel/tcg/translate-all.c
View file

@ -310,6 +310,7 @@ static int cpu_restore_state_from_tb(CPUState *cpu, TranslationBlock *tb,
uint8_t *p = tb->tc.ptr + tb->tc.size;
int i, j, num_insns = tb->icount;
#ifdef CONFIG_PROFILER
TCGProfile *prof = &tcg_ctx->prof;
int64_t ti = profile_getclock();
#endif
@ -344,8 +345,9 @@ static int cpu_restore_state_from_tb(CPUState *cpu, TranslationBlock *tb,
restore_state_to_opc(env, tb, data);
#ifdef CONFIG_PROFILER
tcg_ctx->restore_time += profile_getclock() - ti;
tcg_ctx->restore_count++;
atomic_set(&prof->restore_time,
prof->restore_time + profile_getclock() - ti);
atomic_set(&prof->restore_count, prof->restore_count + 1);
#endif
return 0;
}
@ -1300,6 +1302,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
tcg_insn_unit *gen_code_buf;
int gen_code_size, search_size;
#ifdef CONFIG_PROFILER
TCGProfile *prof = &tcg_ctx->prof;
int64_t ti;
#endif
assert_memory_lock();
@ -1327,8 +1330,8 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
tcg_ctx->tb_cflags = cflags;
#ifdef CONFIG_PROFILER
tcg_ctx->tb_count1++; /* includes aborted translations because of
exceptions */
/* includes aborted translations because of exceptions */
atomic_set(&prof->tb_count1, prof->tb_count1 + 1);
ti = profile_getclock();
#endif
@ -1353,8 +1356,8 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
}
#ifdef CONFIG_PROFILER
tcg_ctx->tb_count++;
tcg_ctx->interm_time += profile_getclock() - ti;
atomic_set(&prof->tb_count, prof->tb_count + 1);
atomic_set(&prof->interm_time, prof->interm_time + profile_getclock() - ti);
ti = profile_getclock();
#endif
@ -1374,10 +1377,10 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
tb->tc.size = gen_code_size;
#ifdef CONFIG_PROFILER
tcg_ctx->code_time += profile_getclock() - ti;
tcg_ctx->code_in_len += tb->size;
tcg_ctx->code_out_len += gen_code_size;
tcg_ctx->search_out_len += search_size;
atomic_set(&prof->code_time, prof->code_time + profile_getclock() - ti);
atomic_set(&prof->code_in_len, prof->code_in_len + tb->size);
atomic_set(&prof->code_out_len, prof->code_out_len + gen_code_size);
atomic_set(&prof->search_out_len, prof->search_out_len + search_size);
#endif
#ifdef DEBUG_DISAS