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[174.21.9.133]) by smtp.gmail.com with ESMTPSA id 6-v6sm17441210pgl.6.2018.10.16.10.49.20 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 16 Oct 2018 10:49:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=TgDCiAlCqNyacH51QEaK7ppBxrOCvC2iTKIGNr6fsnY=; b=fB2N+I6OuCYnekuFBdu1GwQJLr0WrHGdLdTZ4rlAEO6THkvqQRExNmLVcYggkgqCTL 7x+S2WVm6qZ3EiKvBHuT3m7Tluudf8YijgWcV+fyDZBWOMhNZgnNV93wFwSfN6yHqusc GVtO1OKavZuVGFeY2ImoPd122E4AtOzaBwrCk= 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; bh=TgDCiAlCqNyacH51QEaK7ppBxrOCvC2iTKIGNr6fsnY=; b=f4DmWyR9iQ2txgLNxSzyKhxdkmg7HsQTg3FcqCMNZjVqXQsDfXsIKCI106NW8dl8pT sxZSBpXhlj/DSjEV/EUiq+Odr3j6aMpOXDJmmJvxR14wrmz3p1+Fw4RRwsVt9gYpHPd3 pNmuMm3BD+W9KRmmb41jf5TIPov71G6Yr8KJXfZM4uXvnwbX6VIYLuFXH64hHhA5Mj7D 4tl1aJ1HkQ6HRNfiO+uRj+XkFVB4GXTh6PSBaJZByQ/pjbPwtrnumRYRGBCYHENNSwDs UMtoYLN3l8/6UzZtmZp/6b7pDT64PIAFYnXSieXN9JJqCNsQwE91AsYGRRLoEi/b01T2 pvGA== X-Gm-Message-State: ABuFfoi7b4X0vLu5pTwLJUGOzJvxK4xBHx019u5P8uDRDQJIJc2FW2lv 1aZYcJRXWOU9Cshw7iU+JQhQr92zZ48= X-Google-Smtp-Source: ACcGV60UWuE6tjNQnxPrYNamsYvuJr81Pk31wIIR2MGMQ/6qOg9xVN7oBp3NQbm3g8UQuf3oA28p6Q== X-Received: by 2002:a63:4a64:: with SMTP id j36-v6mr21044940pgl.168.1539712161508; Tue, 16 Oct 2018 10:49:21 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Tue, 16 Oct 2018 10:48:55 -0700 Message-Id: <20181016174911.9052-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20181016174911.9052-1-richard.henderson@linaro.org> References: <20181016174911.9052-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::429 Subject: [Qemu-devel] [PULL 05/21] tcg: distribute tcg_time into TCG contexts X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, "Emilio G. Cota" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDMRC_1 RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: "Emilio G. Cota" When we implemented per-vCPU TCG contexts, we forgot to also distribute the tcg_time counter, which has remained as a global accessed without any serialization, leading to potentially missed counts. Fix it by distributing the field over the TCG contexts, embedding it into TCGProfile with a field called "cpu_exec_time", which is more descriptive than "tcg_time". Add a function to query this value directly, and for completeness, fill in the field in tcg_profile_snapshot, even though its callers do not use it. Signed-off-by: Emilio G. Cota Message-Id: <20181010144853.13005-5-cota@braap.org> Signed-off-by: Richard Henderson --- include/qemu/timer.h | 1 - tcg/tcg.h | 2 ++ cpus.c | 3 ++- monitor.c | 13 ++++++++++--- tcg/tcg.c | 23 +++++++++++++++++++++++ 5 files changed, 37 insertions(+), 5 deletions(-) diff --git a/include/qemu/timer.h b/include/qemu/timer.h index a005ed2692..dfecd03e28 100644 --- a/include/qemu/timer.h +++ b/include/qemu/timer.h @@ -1046,7 +1046,6 @@ static inline int64_t profile_getclock(void) return get_clock(); } =20 -extern int64_t tcg_time; extern int64_t dev_time; #endif =20 diff --git a/tcg/tcg.h b/tcg/tcg.h index d80ef2a883..c59f254e27 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -629,6 +629,7 @@ typedef struct TCGOp { QEMU_BUILD_BUG_ON(NB_OPS > (1 << 8)); =20 typedef struct TCGProfile { + int64_t cpu_exec_time; int64_t tb_count1; int64_t tb_count; int64_t op_count; /* total insn count */ @@ -1002,6 +1003,7 @@ int tcg_check_temp_count(void); #define tcg_check_temp_count() 0 #endif =20 +int64_t tcg_cpu_exec_time(void); void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf); void tcg_dump_op_count(FILE *f, fprintf_function cpu_fprintf); =20 diff --git a/cpus.c b/cpus.c index 361678e459..cce64874e6 100644 --- a/cpus.c +++ b/cpus.c @@ -1425,7 +1425,8 @@ static int tcg_cpu_exec(CPUState *cpu) ret =3D cpu_exec(cpu); cpu_exec_end(cpu); #ifdef CONFIG_PROFILER - tcg_time +=3D profile_getclock() - ti; + atomic_set(&tcg_ctx->prof.cpu_exec_time, + tcg_ctx->prof.cpu_exec_time + profile_getclock() - ti); #endif return ret; } diff --git a/monitor.c b/monitor.c index b9258a7438..823b5a1099 100644 --- a/monitor.c +++ b/monitor.c @@ -83,6 +83,7 @@ #include "sysemu/cpus.h" #include "sysemu/iothread.h" #include "qemu/cutils.h" +#include "tcg/tcg.h" =20 #if defined(TARGET_S390X) #include "hw/s390x/storage-keys.h" @@ -1966,16 +1967,22 @@ static void hmp_info_numa(Monitor *mon, const QDict= *qdict) =20 #ifdef CONFIG_PROFILER =20 -int64_t tcg_time; int64_t dev_time; =20 static void hmp_info_profile(Monitor *mon, const QDict *qdict) { + static int64_t last_cpu_exec_time; + int64_t cpu_exec_time; + int64_t delta; + + cpu_exec_time =3D tcg_cpu_exec_time(); + delta =3D cpu_exec_time - last_cpu_exec_time; + monitor_printf(mon, "async time %" PRId64 " (%0.3f)\n", dev_time, dev_time / (double)NANOSECONDS_PER_SECOND); monitor_printf(mon, "qemu time %" PRId64 " (%0.3f)\n", - tcg_time, tcg_time / (double)NANOSECONDS_PER_SECOND); - tcg_time =3D 0; + delta, delta / (double)NANOSECONDS_PER_SECOND); + last_cpu_exec_time =3D cpu_exec_time; dev_time =3D 0; } #else diff --git a/tcg/tcg.c b/tcg/tcg.c index 8f26916b99..e85133ef05 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -30,6 +30,7 @@ /* Define to jump the ELF file used to communicate with GDB. */ #undef DEBUG_JIT =20 +#include "qemu/error-report.h" #include "qemu/cutils.h" #include "qemu/host-utils.h" #include "qemu/timer.h" @@ -3361,6 +3362,7 @@ void tcg_profile_snapshot(TCGProfile *prof, bool coun= ters, bool table) const TCGProfile *orig =3D &s->prof; =20 if (counters) { + PROF_ADD(prof, orig, cpu_exec_time); PROF_ADD(prof, orig, tb_count1); PROF_ADD(prof, orig, tb_count); PROF_ADD(prof, orig, op_count); @@ -3412,11 +3414,32 @@ void tcg_dump_op_count(FILE *f, fprintf_function cp= u_fprintf) prof.table_op_count[i]); } } + +int64_t tcg_cpu_exec_time(void) +{ + unsigned int n_ctxs =3D atomic_read(&n_tcg_ctxs); + unsigned int i; + int64_t ret =3D 0; + + for (i =3D 0; i < n_ctxs; i++) { + const TCGContext *s =3D atomic_read(&tcg_ctxs[i]); + const TCGProfile *prof =3D &s->prof; + + ret +=3D atomic_read(&prof->cpu_exec_time); + } + return ret; +} #else void tcg_dump_op_count(FILE *f, fprintf_function cpu_fprintf) { cpu_fprintf(f, "[TCG profiler not compiled]\n"); } + +int64_t tcg_cpu_exec_time(void) +{ + error_report("%s: TCG profiler not compiled", __func__); + exit(EXIT_FAILURE); +} #endif =20 =20 --=20 2.17.2