From: Richard Henderson <richard.henderson@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>, qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
cota@braap.org,
"Vanderson M. do Rosario" <vandersonmr2@gmail.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH v9 12/13] tb-stats: adding TBStatistics info into perf dump
Date: Tue, 8 Oct 2019 15:46:50 -0400 [thread overview]
Message-ID: <e9103b0f-3853-44d7-9b40-7c86910a3a6f@linaro.org> (raw)
In-Reply-To: <20191007152839.30804-13-alex.bennee@linaro.org>
On 10/7/19 11:28 AM, Alex Bennée wrote:
> diff --git a/accel/tcg/perf/jitdump.c b/accel/tcg/perf/jitdump.c
> index e1d6f2214e..e7b86173e0 100644
> --- a/accel/tcg/perf/jitdump.c
> +++ b/accel/tcg/perf/jitdump.c
> @@ -146,7 +146,20 @@ void start_jitdump_file(void)
>
> void append_load_in_jitdump_file(TranslationBlock *tb)
> {
> - gchar *func_name = g_strdup_printf("TB virt:0x"TARGET_FMT_lx, tb->pc);
> + g_autoptr(GString) func_name = g_string_new("TB virt:");
> +
> + g_string_append_printf(func_name, "0x"TARGET_FMT_lx, tb->pc);
I think it was clearer as a single printf. Use g_string_printf().
But now I see where the missing GString went -- bad patch splitting. ;-)
> + if (tb->tb_stats) {
> + TBStatistics *tbs = tb->tb_stats;
> + unsigned g = stat_per_translation(tbs, code.num_guest_inst);
> + unsigned ops = stat_per_translation(tbs, code.num_tcg_ops);
> + unsigned ops_opt = stat_per_translation(tbs, code.num_tcg_ops_opt);
> + unsigned spills = stat_per_translation(tbs, code.spills);
> +
> + g_string_append_printf(func_name, " (g:%u op:%u opt:%u spills:%d)",
> + g, ops, ops_opt, spills);
> + }
Oh, hum. Does it really make sense to have accumulated averages here? Why
does it not make more sense to have the statistics about this particular TB?
After all, different TB -- even for the same guest code -- will appear at
different places within the code_gen_buffer, and so have different entries in
this log.
r~
next prev parent reply other threads:[~2019-10-08 19:48 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-07 15:28 [PATCH v9 00/13] TCG code quality tracking and perf integration Alex Bennée
2019-10-07 15:28 ` [PATCH v9 01/13] accel/tcg: introduce TBStatistics structure Alex Bennée
2019-10-08 12:35 ` Richard Henderson
2019-12-13 11:14 ` Alex Bennée
2019-10-07 15:28 ` [PATCH v9 02/13] accel: collecting TB execution count Alex Bennée
2019-10-08 13:10 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 03/13] accel: collecting JIT statistics Alex Bennée
2019-10-08 13:38 ` Richard Henderson
2019-12-13 11:51 ` Alex Bennée
2019-10-07 15:28 ` [PATCH v9 04/13] accel: replacing part of CONFIG_PROFILER with TBStats Alex Bennée
2019-10-08 13:58 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 05/13] accel: adding TB_JIT_TIME and full replacing CONFIG_PROFILER Alex Bennée
2019-10-08 15:25 ` Richard Henderson
2019-12-13 21:49 ` Alex Bennée
2019-12-16 20:34 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 06/13] debug: add -d tb_stats to control TBStatistics collection: Alex Bennée
2019-10-08 15:34 ` Richard Henderson
2019-10-08 15:49 ` Alex Bennée
2019-10-07 15:28 ` [PATCH v9 07/13] monitor: adding tb_stats hmp command Alex Bennée
2019-10-08 15:48 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 08/13] tb-stats: reset the tracked TBs on a tb_flush Alex Bennée
2019-10-08 18:00 ` Richard Henderson
2019-10-08 19:18 ` Alex Bennée
2019-10-07 15:28 ` [PATCH v9 09/13] Adding info [tb-list|tb] commands to HMP (WIP) Alex Bennée
2019-10-08 18:50 ` Richard Henderson
2019-10-08 19:36 ` Alex Bennée
2019-10-09 9:44 ` Dr. David Alan Gilbert
2019-10-07 15:28 ` [PATCH v9 10/13] tb-stats: dump hot TBs at the end of the execution Alex Bennée
2019-10-08 19:05 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 11/13] accel/tcg: adding integration with linux perf Alex Bennée
2019-10-08 19:33 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 12/13] tb-stats: adding TBStatistics info into perf dump Alex Bennée
2019-10-08 19:46 ` Richard Henderson [this message]
2019-10-07 15:28 ` [PATCH v9 13/13] configure: remove the final bits of --profiler support Alex Bennée
2019-10-08 19:39 ` Richard Henderson
2019-10-07 18:14 ` [PATCH v9 00/13] TCG code quality tracking and perf integration no-reply
2019-10-07 18:47 ` no-reply
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