From patchwork Wed Aug 2 16:46:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 13338558 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CBEE7C04E69 for ; Wed, 2 Aug 2023 16:52:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=RZiZ/G9TdV51CI5QVo4hkAN8o71qgYJXu3DuS44rojw=; b=jnnzs4HlWJCKiu LfC9agezwUhFLkVUeaEXGFqqFku5XmesQMWhJEHPJ2qTT1338mJD6VzqI3g6ZD/UAj4C/9xTpMVzp tq2VAsmROcr52I2cQAo1lcEkqME2GA9EK21vuKYeRPWtgRn/I+gHibNJD3iCr6x4bbmHNTO3/H2+W odvqi8QpwGFEKWn1GU2oXBc8jm6qaafW9VOrmw0+aSFmApgBmT6TjItTZLV/CNQSnh00/5dVveQVQ A8CLIOYRgTx4xcnPqm9R1eHImIhh6UWLn5YznaYLwFCveGHQUx3TGLeHCU3grgpsvXWbz7AP0m2RC 7U9EkXAMNsKCeX85x+Cg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qRF59-005PmS-0S; Wed, 02 Aug 2023 16:52:19 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qRF56-005Pko-1g for linux-riscv@lists.infradead.org; Wed, 02 Aug 2023 16:52:18 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 095B161A3E; Wed, 2 Aug 2023 16:52:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C253C433C8; Wed, 2 Aug 2023 16:51:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690995135; bh=hP8Bz7RWW4+moS/X2zthnCXyEaOfAgK0ZYvCm4g+kP4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eJlajARTiQw0wmVH+8BmDyVwH/J6ZNHqhetqesuZrKodpf/s0TzQgKvDPVtSsU046 flSuT+qJyT9JBueeF390ynX7srNGmdjsZwCWsc02/FhDqCHVHTK2PwIFuTCNQRkZiw 0x9hXbKPu4Y4RRHsQATOFk4yd91Ucmb24v0LOiCbGwGaC5WFB/t4faWrvL5CxoO/6T ohqw0moDbQn0NuDLMmX/2bisP9DszzXcl5ls31EakEUd5oROo6MhlXwrfI1vdlA9d1 xjNil637eLOAwM4Lw13tawI1IjccWixfpEh/zJNhxsXrVOadWm+EN/jt2Ebra34x9u 9WUkOsu5POSoQ== From: guoren@kernel.org To: paul.walmsley@sifive.com, anup@brainfault.org, peterz@infradead.org, mingo@redhat.com, will@kernel.org, palmer@rivosinc.com, longman@redhat.com, boqun.feng@gmail.com, tglx@linutronix.de, paulmck@kernel.org, rostedt@goodmis.org, rdunlap@infradead.org, catalin.marinas@arm.com, conor.dooley@microchip.com, xiaoguang.xing@sophgo.com, bjorn@rivosinc.com, alexghiti@rivosinc.com, keescook@chromium.org, greentime.hu@sifive.com, ajones@ventanamicro.com, jszhang@kernel.org, wefu@redhat.com, wuwei2016@iscas.ac.cn Cc: linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-csky@vger.kernel.org, Guo Ren , Guo Ren Subject: [PATCH V10 17/19] RISC-V: paravirt: pvqspinlock: Add trace point for pv_kick/wait Date: Wed, 2 Aug 2023 12:46:59 -0400 Message-Id: <20230802164701.192791-18-guoren@kernel.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20230802164701.192791-1-guoren@kernel.org> References: <20230802164701.192791-1-guoren@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230802_095216_648094_0FCD6F6E X-CRM114-Status: GOOD ( 12.26 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Guo Ren Add trace point for pv_kick/wait, here is the output: entries-in-buffer/entries-written: 33927/33927 #P:12 _-----=> irqs-off/BH-disabled / _----=> need-resched | / _---=> hardirq/softirq || / _--=> preempt-depth ||| / _-=> migrate-disable |||| / delay TASK-PID CPU# ||||| TIMESTAMP FUNCTION | | | ||||| | | sh-100 [001] d..2. 28.312294: pv_wait: cpu 1 out of wfi -0 [000] d.h4. 28.322030: pv_kick: cpu 0 kick target cpu 1 sh-100 [001] d..2. 30.982631: pv_wait: cpu 1 out of wfi -0 [000] d.h4. 30.993289: pv_kick: cpu 0 kick target cpu 1 sh-100 [002] d..2. 44.987573: pv_wait: cpu 2 out of wfi -0 [000] d.h4. 44.989000: pv_kick: cpu 0 kick target cpu 2 -0 [003] d.s3. 51.593978: pv_kick: cpu 3 kick target cpu 4 rcu_sched-15 [004] d..2. 51.595192: pv_wait: cpu 4 out of wfi lock_torture_wr-115 [004] ...2. 52.656482: pv_kick: cpu 4 kick target cpu 2 lock_torture_wr-113 [002] d..2. 52.659146: pv_wait: cpu 2 out of wfi lock_torture_wr-114 [008] d..2. 52.659507: pv_wait: cpu 8 out of wfi lock_torture_wr-114 [008] d..2. 52.663503: pv_wait: cpu 8 out of wfi lock_torture_wr-113 [002] ...2. 52.666128: pv_kick: cpu 2 kick target cpu 8 lock_torture_wr-114 [008] d..2. 52.667261: pv_wait: cpu 8 out of wfi lock_torture_wr-114 [009] .n.2. 53.141515: pv_kick: cpu 9 kick target cpu 11 lock_torture_wr-113 [002] d..2. 53.143339: pv_wait: cpu 2 out of wfi lock_torture_wr-116 [007] d..2. 53.143412: pv_wait: cpu 7 out of wfi lock_torture_wr-118 [000] d..2. 53.143457: pv_wait: cpu 0 out of wfi lock_torture_wr-115 [008] d..2. 53.143481: pv_wait: cpu 8 out of wfi lock_torture_wr-117 [011] d..2. 53.143522: pv_wait: cpu 11 out of wfi lock_torture_wr-117 [011] ...2. 53.143987: pv_kick: cpu 11 kick target cpu 8 lock_torture_wr-115 [008] ...2. 53.144269: pv_kick: cpu 8 kick target cpu 7 Signed-off-by: Guo Ren Signed-off-by: Guo Ren --- arch/riscv/kernel/paravirt.c | 8 +++ .../kernel/trace_events_filter_paravirt.h | 60 +++++++++++++++++++ 2 files changed, 68 insertions(+) create mode 100644 arch/riscv/kernel/trace_events_filter_paravirt.h diff --git a/arch/riscv/kernel/paravirt.c b/arch/riscv/kernel/paravirt.c index 564d64f11e4f..cc80e968ab13 100644 --- a/arch/riscv/kernel/paravirt.c +++ b/arch/riscv/kernel/paravirt.c @@ -134,10 +134,16 @@ int __init pv_time_init(void) #ifdef CONFIG_PARAVIRT_SPINLOCKS #include +#define CREATE_TRACE_POINTS +#include "trace_events_filter_paravirt.h" + void pv_kick(int cpu) { sbi_ecall(SBI_EXT_PVLOCK, SBI_EXT_PVLOCK_KICK_CPU, cpuid_to_hartid_map(cpu), 0, 0, 0, 0, 0); + + trace_pv_kick(smp_processor_id(), cpu); + return; } @@ -153,6 +159,8 @@ void pv_wait(u8 *ptr, u8 val) goto out; wait_for_interrupt(); + + trace_pv_wait(smp_processor_id()); out: local_irq_restore(flags); } diff --git a/arch/riscv/kernel/trace_events_filter_paravirt.h b/arch/riscv/kernel/trace_events_filter_paravirt.h new file mode 100644 index 000000000000..9ff5aa451b12 --- /dev/null +++ b/arch/riscv/kernel/trace_events_filter_paravirt.h @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c), 2023 Alibaba Cloud + * Authors: + * Guo Ren + */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM paravirt + +#if !defined(_TRACE_PARAVIRT_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_PARAVIRT_H + +#include + +TRACE_EVENT(pv_kick, + TP_PROTO(int cpu, int target), + TP_ARGS(cpu, target), + + TP_STRUCT__entry( + __field(int, cpu) + __field(int, target) + ), + + TP_fast_assign( + __entry->cpu = cpu; + __entry->target = target; + ), + + TP_printk("cpu %d kick target cpu %d", + __entry->cpu, + __entry->target + ) +); + +TRACE_EVENT(pv_wait, + TP_PROTO(int cpu), + TP_ARGS(cpu), + + TP_STRUCT__entry( + __field(int, cpu) + ), + + TP_fast_assign( + __entry->cpu = cpu; + ), + + TP_printk("cpu %d out of wfi", + __entry->cpu + ) +); + +#endif /* _TRACE_PARAVIRT_H || TRACE_HEADER_MULTI_READ */ + +#undef TRACE_INCLUDE_PATH +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_PATH ../../../arch/riscv/kernel/ +#define TRACE_INCLUDE_FILE trace_events_filter_paravirt + +/* This part must be outside protection */ +#include