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[143.106.73.166]) by smtp.googlemail.com with ESMTPSA id g25sm1441024qkk.87.2019.08.29.09.48.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Aug 2019 09:48:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=vD3H1azDT1nF0aF1U/15SXskrW4/Xq3TLViAuCH6Ixk=; b=ceyoz3RihwxTF+WEpbj55CHtOwKO+0EKtd4rgQO9HZ+6SoCXCt46IHxqiQTRhQwUbm xNzfghsY3fLid0DebqFIX1Jn7J9uVth9ddNiGt59rfaNDakFvGu1o3kH+SUNz6j0qQ3g rD6dpZZbI5XZS4yD8FqPLMCkdzn79jwxPuQb57UQYdXH7l5Pjc5Yjyk0REW55PP8OLpx 7dQO6oETEoOBY3miAecAj9xHofaO76xLrp/KcHhsD1U0LwPrvfBaNKP4BMWBFc0xMyvQ OlTG8kR1ArY3Hs2vD6BUDm/Qbyu+BOAJBZwgI10RqgNEHhOxijAXSxL2XJGtKUrNCSLo XHAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=vD3H1azDT1nF0aF1U/15SXskrW4/Xq3TLViAuCH6Ixk=; b=kl1ZpxNoKEnEawEx4thqVaw8RYhZBvNDN04iT+2LBbO978VmPuHy2Ri29FrsI1jsjr GqhLDu093XoHZkMeQUhNDUG9ZK3UErfvWHinBxbcmOnj/lS89Xm+OtjjFknC+ZC9DY1L pzvlyCd/OXJ6nrTVcpCPv/1FYb7L8BgCOEO/qvOOWmd40npnBgGUtNNiBRDByEnabEW1 +Zp5o7VvGzkErce4aJtLSIUbsYq1OHKszuVMM1fU74meHOIFYGT5NrnkqW1nEFzUsfgu nE3uIUjtQDlNVkhs+1FVaTuaQ31m0opaAt9AihM94hnZEox/qROvRvLXBaEch94bpeYG aRhg== X-Gm-Message-State: APjAAAUUyF+1dwIR2dXDOkkS93iK2d4MuNlOFFefsyzyA7PiB39kcdY2 r9iPtKsJ9spBd/u67zT/s0XKjUnqPRbsNA== X-Google-Smtp-Source: APXvYqxcUOxnStcdsaFRHAQn9AOA6cPncBc3xRIRGTHj7KPGLZlad7QsPq/sRQC42/LL9PE7fO9/og== X-Received: by 2002:a37:8381:: with SMTP id f123mr10076741qkd.316.1567097305234; Thu, 29 Aug 2019 09:48:25 -0700 (PDT) From: vandersonmr To: qemu-devel@nongnu.org Date: Thu, 29 Aug 2019 13:47:50 -0300 Message-Id: <20190829164754.3906-7-vandersonmr2@gmail.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190829164754.3906-1-vandersonmr2@gmail.com> References: <20190829164754.3906-1-vandersonmr2@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::742 Subject: [Qemu-devel] [PATCH v7 06/10] monitor: adding tb_stats hmp command X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , vandersonmr , "Dr . David Alan Gilbert" , Markus Armbruster , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Adding tb_stats [start|pause|stop|filter] command to hmp. This allows controlling the collection of statistics. It is also possible to set the level of collection: all, jit, or exec. tb_stats filter allow to only collect statistics for the TB in the last_search list. The goal of this command is to allow the dynamic exploration of the TCG behavior and quality. Therefore, for now, a corresponding QMP command is not worthwhile. Acked-by: Dr. David Alan Gilbert Signed-off-by: Vanderson M. do Rosario --- accel/tcg/tb-stats.c | 110 ++++++++++++++++++++++++++++++++++ hmp-commands.hx | 17 ++++++ include/exec/tb-stats-flags.h | 1 + include/exec/tb-stats.h | 11 ++++ monitor/misc.c | 47 +++++++++++++++ vl.c | 6 ++ 6 files changed, 192 insertions(+) diff --git a/accel/tcg/tb-stats.c b/accel/tcg/tb-stats.c index 66abc97ad4..9959477fbb 100644 --- a/accel/tcg/tb-stats.c +++ b/accel/tcg/tb-stats.c @@ -32,6 +32,9 @@ =20 #include "exec/tb-stats.h" =20 +/* only accessed in safe work */ +static GList *last_search; + uint64_t dev_time; =20 struct jit_profile_info { @@ -160,6 +163,95 @@ void dump_jit_profile_info(TCGProfile *s) g_free(jpi); } =20 +static void free_tbstats(void *p, uint32_t hash, void *userp) +{ + g_free(p); +} + +static void clean_tbstats(void) +{ + /* remove all tb_stats */ + qht_iter(&tb_ctx.tb_stats, free_tbstats, NULL); + qht_destroy(&tb_ctx.tb_stats); +} + +void do_hmp_tbstats_safe(CPUState *cpu, run_on_cpu_data icmd) +{ + struct TbstatsCommand *cmdinfo =3D icmd.host_ptr; + int cmd =3D cmdinfo->cmd; + uint32_t level =3D cmdinfo->level; + + switch (cmd) { + case START: + if (tb_stats_collection_paused()) { + set_tbstats_flags(level); + } else { + if (tb_stats_collection_enabled()) { + qemu_printf("TB information already being recorded"); + return; + } + qht_init(&tb_ctx.tb_stats, tb_stats_cmp, CODE_GEN_HTABLE_SIZE, + QHT_MODE_AUTO_RESIZE); + } + + set_default_tbstats_flag(level); + enable_collect_tb_stats(); + tb_flush(cpu); + break; + case PAUSE: + if (!tb_stats_collection_enabled()) { + qemu_printf("TB information not being recorded"); + return; + } + + /* Continue to create TBStatistic structures but stop collecting s= tatistics */ + pause_collect_tb_stats(); + set_default_tbstats_flag(TB_NOTHING); + set_tbstats_flags(TB_PAUSED); + tb_flush(cpu); + break; + case STOP: + if (!tb_stats_collection_enabled()) { + qemu_printf("TB information not being recorded"); + return; + } + + /* Dissalloc all TBStatistics structures and stop creating new one= s */ + disable_collect_tb_stats(); + clean_tbstats(); + tb_flush(cpu); + break; + case FILTER: + if (!tb_stats_collection_enabled()) { + qemu_printf("TB information not being recorded"); + return; + } + if (!last_search) { + qemu_printf("no search on record! execute info tbs before filt= ering!"); + return; + } + + set_default_tbstats_flag(TB_NOTHING); + + /* Set all tbstats as paused, then return only the ones from last_= search */ + pause_collect_tb_stats(); + set_tbstats_flags(TB_PAUSED); + + for (GList *iter =3D last_search; iter; iter =3D g_list_next(iter)= ) { + TBStatistics *tbs =3D iter->data; + tbs->stats_enabled =3D level; + } + + tb_flush(cpu); + + break; + default: /* INVALID */ + g_assert_not_reached(); + break; + } + + g_free(cmdinfo); +} =20 void init_tb_stats_htable_if_not(void) { @@ -195,6 +287,24 @@ bool tb_stats_collection_paused(void) return tcg_collect_tb_stats =3D=3D TB_STATS_PAUSED; } =20 +static void reset_tbstats_flag(void *p, uint32_t hash, void *userp) +{ + uint32_t flag =3D *((int *)userp); + TBStatistics *tbs =3D p; + tbs->stats_enabled =3D flag; +} + +void set_default_tbstats_flag(uint32_t flag) +{ + default_tbstats_flag =3D flag; +} + +void set_tbstats_flags(uint32_t flag) +{ + /* iterate over tbstats setting their flag as TB_NOTHING */ + qht_iter(&tb_ctx.tb_stats, reset_tbstats_flag, &flag); +} + uint32_t get_default_tbstats_flag(void) { return default_tbstats_flag; diff --git a/hmp-commands.hx b/hmp-commands.hx index cfcc044ce4..6cd2800378 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -1886,6 +1886,23 @@ STEXI @findex qemu-io Executes a qemu-io command on the given block device. =20 +ETEXI +#if defined(CONFIG_TCG) + { + .name =3D "tb_stats", + .args_type =3D "command:s,level:s?", + .params =3D "command [stats_level]", + .help =3D "Control tb statistics collection:" + "tb_stats (start|pause|stop|filter) [all|jit_stats= |exec_stats]", + .cmd =3D hmp_tbstats, + }, +#endif + +STEXI +@item tb_stats +@findex +Control recording tb statistics + ETEXI =20 { diff --git a/include/exec/tb-stats-flags.h b/include/exec/tb-stats-flags.h index c936ac1084..16b563f858 100644 --- a/include/exec/tb-stats-flags.h +++ b/include/exec/tb-stats-flags.h @@ -35,6 +35,7 @@ enum TBStatsStatus { #define TB_EXEC_STATS (1 << 1) #define TB_JIT_STATS (1 << 2) #define TB_JIT_TIME (1 << 3) +#define TB_PAUSED (1 << 4) =20 extern int tcg_collect_tb_stats; extern uint32_t default_tbstats_flag; diff --git a/include/exec/tb-stats.h b/include/exec/tb-stats.h index 6a53bef31b..65063c52d7 100644 --- a/include/exec/tb-stats.h +++ b/include/exec/tb-stats.h @@ -32,6 +32,9 @@ =20 #include "exec/tb-stats-flags.h" =20 +enum SortBy { SORT_BY_HOTNESS, SORT_BY_HG /* Host/Guest */, SORT_BY_SPILLS= }; +enum TbstatsCmd { START, PAUSE, STOP, FILTER }; + #define tb_stats_enabled(tb, JIT_STATS) \ (tb && tb->tb_stats && (tb->tb_stats->stats_enabled & JIT_STATS)) =20 @@ -105,6 +108,13 @@ void init_tb_stats_htable_if_not(void); =20 void dump_jit_profile_info(TCGProfile *s); =20 +struct TbstatsCommand { + enum TbstatsCmd cmd; + uint32_t level; +}; + +void do_hmp_tbstats_safe(CPUState *cpu, run_on_cpu_data icmd); + /* TBStatistic collection controls */ void enable_collect_tb_stats(void); void disable_collect_tb_stats(void); @@ -112,6 +122,7 @@ void pause_collect_tb_stats(void); bool tb_stats_collection_enabled(void); bool tb_stats_collection_paused(void); =20 +void set_default_tbstats_flag(uint32_t flag); uint32_t get_default_tbstats_flag(void); =20 #endif diff --git a/monitor/misc.c b/monitor/misc.c index ac4ff58d96..b389ca09a1 100644 --- a/monitor/misc.c +++ b/monitor/misc.c @@ -459,6 +459,49 @@ static void hmp_info_registers(Monitor *mon, const QDi= ct *qdict) } =20 #ifdef CONFIG_TCG +static void hmp_tbstats(Monitor *mon, const QDict *qdict) +{ + if (!tcg_enabled()) { + error_report("TB information is only available with accel=3Dtcg"); + return; + } + + char *cmd =3D (char *) qdict_get_try_str(qdict, "command"); + enum TbstatsCmd icmd =3D -1; + + if (strcmp(cmd, "start") =3D=3D 0) { + icmd =3D START; + } else if (strcmp(cmd, "pause") =3D=3D 0) { + icmd =3D PAUSE; + } else if (strcmp(cmd, "stop") =3D=3D 0) { + icmd =3D STOP; + } else if (strcmp(cmd, "filter") =3D=3D 0) { + icmd =3D FILTER; + } else { + error_report("invalid command!"); + return; + } + + char *slevel =3D (char *) qdict_get_try_str(qdict, "level"); + uint32_t level =3D TB_EXEC_STATS | TB_JIT_STATS | TB_JIT_TIME; + if (slevel) { + if (strcmp(slevel, "jit") =3D=3D 0) { + level =3D TB_JIT_STATS; + } else if (strcmp(slevel, "exec") =3D=3D 0) { + level =3D TB_EXEC_STATS; + } else if (strcmp(slevel, "time") =3D=3D 0) { + level =3D TB_JIT_TIME; + } + } + + struct TbstatsCommand *tbscommand =3D g_new0(struct TbstatsCommand, 1); + tbscommand->cmd =3D icmd; + tbscommand->level =3D level; + async_safe_run_on_cpu(first_cpu, do_hmp_tbstats_safe, + RUN_ON_CPU_HOST_PTR(tbscommand)); + +} + static void hmp_info_jit(Monitor *mon, const QDict *qdict) { if (!tcg_enabled()) { @@ -1089,8 +1132,12 @@ static void hmp_info_mtree(Monitor *mon, const QDict= *qdict) =20 static void hmp_info_profile(Monitor *mon, const QDict *qdict) { +#ifdef CONFIG_TCG dump_jit_exec_time_info(dev_time); dev_time =3D 0; +#else + error_report("TCG should be enabled!"); +#endif } =20 /* Capture support */ diff --git a/vl.c b/vl.c index 4203cc728c..dcb30eea8a 100644 --- a/vl.c +++ b/vl.c @@ -1796,11 +1796,17 @@ static bool main_loop_should_exit(void) =20 static void main_loop(void) { +#ifdef CONFIG_TCG uint64_t ti; +#endif while (!main_loop_should_exit()) { +#ifdef CONFIG_TCG ti =3D profile_getclock(); +#endif main_loop_wait(false); +#ifdef CONFIG_TCG dev_time +=3D profile_getclock() - ti; +#endif } } =20 --=20 2.22.0