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([2602:47:d49e:3c01:8adc:a144:6ec2:4d71]) by smtp.gmail.com with ESMTPSA id p66-20020a625b45000000b005252defb016sm3649674pfb.122.2022.06.21.13.46.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Jun 2022 13:46:48 -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 :mime-version:content-transfer-encoding; bh=7zQvLkFRfY6uiQ/phm8O3aPlVxdTqBvkghprkVFaI2Y=; b=j6otmGLb/Cw/NVe5L0hwIqVgRGo7+/vJxPZkR/qBGgb4zUS0JxKJZ9nvc47X709CNU uTDchIlSWw233GE+QdK5+uO+6kGpnmuzbpLPdZVnGAIM2N/lnZphNirUCDwpRBeszclY 2aazHLeI3LbgRm/CeksuzNTgdEHklmReppPyFW/YXmoL9gz2pmRnq7khKuGpptI8yQWz 7MbzohW/UPq3/MhjJTxRO6/AMPLygRn4QZcq9f0DbandABDBoPdGi4kojQOWTSuA/aQv owluUDE1tsm+KiCZskm/8yk7KV4VxYfdClHNWUlROJ+g4EYrCFIQVeTEMnGd5XrugrRt +zDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7zQvLkFRfY6uiQ/phm8O3aPlVxdTqBvkghprkVFaI2Y=; b=R8XpphgTvOCxIYMpmjkh44Meoe1xbGSAoIuDZSlI3xa/v/YkFaoP7fd5fkanARgzRh UTvCd0E0rNZqo2RphDIOM+z8cxJuFhQpX6qTXDJbxWhJU7ENPLcvvPSSQgnws42RUGEP ap7NxWN7AB2IO9Dyr+C6IoTja3xOICeRsvBOC/oOeNgdZUw76Xf5UGDLK6kyXLsHxBZG YdKsLefXwfua8yk3U5XEsWsorSRKq5nvdJBJPOdq7D0n8NhsKO0OkEFlHRVCelGRheqi tEgQJLDtWnulx+idnu6RJIjXtfp1NW0eLppxvuYa6Q0n8lJmto5zmwXT0/yJrmWGHCos Dl3g== X-Gm-Message-State: AJIora+FRZKPhkis/wa0ukeYKV76T3IPAQfNkM9jQkfpB8TgNJTr0kFh oEre0yCwDgRJBGSSlNjqyZUQscb8TIuqfw== X-Google-Smtp-Source: AGRyM1vUi8fxnsMkZlj4A76tPTZJF45sosX4rKum9qywjPzIL/o2dL4hO368vUWBSJM2JDpwFnn0Ng== X-Received: by 2002:a17:903:22c6:b0:167:5991:fb63 with SMTP id y6-20020a17090322c600b001675991fb63mr30862376plg.37.1655844409201; Tue, 21 Jun 2022 13:46:49 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: Idan Horowitz Subject: [PULL 5/9] qemu-timer: Skip empty timer lists before locking in qemu_clock_deadline_ns_all Date: Tue, 21 Jun 2022 13:46:39 -0700 Message-Id: <20220621204643.371397-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220621204643.371397-1-richard.henderson@linaro.org> References: <20220621204643.371397-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::631; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x631.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1655844604825100001 Content-Type: text/plain; charset="utf-8" From: Idan Horowitz This decreases qemu_clock_deadline_ns_all's share from 23.2% to 13% in a profile of icount-enabled aarch64-softmmu. Signed-off-by: Idan Horowitz Reviewed-by: Richard Henderson Message-Id: <20220114004358.299534-2-idan.horowitz@gmail.com> Signed-off-by: Richard Henderson --- util/qemu-timer.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/util/qemu-timer.c b/util/qemu-timer.c index a670a57881..6a0de33dd2 100644 --- a/util/qemu-timer.c +++ b/util/qemu-timer.c @@ -261,6 +261,9 @@ int64_t qemu_clock_deadline_ns_all(QEMUClockType type, = int attr_mask) } =20 QLIST_FOREACH(timer_list, &clock->timerlists, list) { + if (!qatomic_read(&timer_list->active_timers)) { + continue; + } qemu_mutex_lock(&timer_list->active_timers_lock); ts =3D timer_list->active_timers; /* Skip all external timers */ --=20 2.34.1