From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E45B3C14 for ; Tue, 11 Oct 2022 15:02:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1665500533; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ti1NCFCTzr5YPwBHvg45c+mfaiUwrR60uA7ep6lLZuA=; b=bFlEr+6Kou7c1Uq+2pDZ9tDyqBmC6hB5Yz69cCDmjCiwJ0RYANSd+q7eqqXzIxNZlKmCsJ HK86uUjGeeiHsSK1V+RpVwq/virSvYwS4LVGk7CpdIk8VDl90w3NrN1PoMDqyymSkyYH6c x7t6hK8WAEMHQictmEFy0bW7/NiJmGY= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-401-hjN6KIBjMwiI9Tpl2y1Y2Q-1; Tue, 11 Oct 2022 11:02:09 -0400 X-MC-Unique: hjN6KIBjMwiI9Tpl2y1Y2Q-1 Received: by mail-wm1-f71.google.com with SMTP id bg21-20020a05600c3c9500b003c2acbff422so912372wmb.0 for ; Tue, 11 Oct 2022 08:02:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=mime-version:message-id:date:references:in-reply-to:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ti1NCFCTzr5YPwBHvg45c+mfaiUwrR60uA7ep6lLZuA=; b=dxhdiIUSyqD2YHXmkWTeHT9NdWed2tGzvsmEi0DehY4YzsUNw0Wlnc2YYeOrsp+NlF ikUDwaLVU9JG5mAwCQLgA8A1KOvsU2S7vDuSLuCT7JUTx6fseLGrqgEx++nRV84lTl/L Fjq7yyH3E9o79F3zp03mYYlzPY8AK69FlHgPZH5ywv2J9iLvdncX6pvskjLORz8K9C4H OcvyV2saXYZ/IA3cC9hXCjUHzvS8zZRe4qU4cZ3X6l+OBjBJ3otxNAHoJ90aV3V4eQbq wf96FM1WuGsNoXCgmWtMnnSOGCPQSEgftDYiL7Lg2pjL/WVHcrHJNE/b9eDmcwoS8ukq HCSw== X-Gm-Message-State: ACrzQf0gp+6/SyihNG4Sugtqqfn2fASGWoCMOmpjGnBSlvb/EbhSbQ06 x0+WutLVGhx/g/sVmFGe8P8k5HBX3glW0VRkNHd8nMA19tvVcwCvtu8DGLZG38JGOiDC5r8VG5m 2eCt5cduSZ+FafrVDZUe5 X-Received: by 2002:a5d:59a3:0:b0:22e:4b62:7ceb with SMTP id p3-20020a5d59a3000000b0022e4b627cebmr15699180wrr.90.1665500528705; Tue, 11 Oct 2022 08:02:08 -0700 (PDT) X-Google-Smtp-Source: AMsMyM7srUgXRaEVg4Pb59BUs0ShAt8e40s56KQw2lU0G4VdN3sOMR/0VHio2//G+OqnLs1Wx3l7Vw== X-Received: by 2002:a5d:59a3:0:b0:22e:4b62:7ceb with SMTP id p3-20020a5d59a3000000b0022e4b627cebmr15699160wrr.90.1665500528495; Tue, 11 Oct 2022 08:02:08 -0700 (PDT) Received: from vschneid.remote.csb ([104.132.153.106]) by smtp.gmail.com with ESMTPSA id bh11-20020a05600c3d0b00b003b49ab8ff53sm13552403wmb.8.2022.10.11.08.02.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Oct 2022 08:02:07 -0700 (PDT) From: Valentin Schneider To: Steven Rostedt Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, x86@kernel.org, "Paul E. McKenney" , Peter Zijlstra , Thomas Gleixner , Sebastian Andrzej Siewior , Juri Lelli , Daniel Bristot de Oliveira , Marcelo Tosatti , Frederic Weisbecker , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Marc Zyngier , Mark Rutland , Russell King , Nicholas Piggin , Guo Ren , "David S. Miller" Subject: Re: [RFC PATCH 4/5] irq_work: Trace calls to arch_irq_work_raise() In-Reply-To: <20221008153442.159b2f2d@rorschach.local.home> References: <20221007154145.1877054-1-vschneid@redhat.com> <20221007154533.1878285-4-vschneid@redhat.com> <20221008153442.159b2f2d@rorschach.local.home> Date: Tue, 11 Oct 2022 16:02:06 +0100 Message-ID: Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain On 08/10/22 15:34, Steven Rostedt wrote: > On Fri, 7 Oct 2022 16:45:32 +0100 > Valentin Schneider wrote: >> } >> >> +static inline void irq_work_raise(void) >> +{ >> + if (arch_irq_work_has_interrupt()) >> + trace_ipi_send_cpu(_RET_IP_, smp_processor_id()); > > To save on the branch, let's make the above: > > if (trace_ipi_send_cpu_enabled() && arch_irq_work_has_interrupt()) > > As the "trace_*_enabled()" is a static branch that will make it a nop > when the tracepoint is not enabled. > Makes sense, thanks for the suggestion. > -- Steve > > >> + >> + arch_irq_work_raise(); >> +} >> + >> /* Enqueue on current CPU, work must already be claimed and preempt disabled */