From nobody Sat Apr 27 22:10:21 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; dkim=fail spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 14919079240841008.0436146827077; Tue, 11 Apr 2017 03:52:04 -0700 (PDT) Received: from localhost ([::1]:38439 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cxtOz-0004PB-Rg for importer@patchew.org; Tue, 11 Apr 2017 06:52:01 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43742) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cxtNT-0003Y9-D1 for qemu-devel@nongnu.org; Tue, 11 Apr 2017 06:50:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cxtNQ-0004SG-Ur for qemu-devel@nongnu.org; Tue, 11 Apr 2017 06:50:27 -0400 Received: from mail-wm0-x232.google.com ([2a00:1450:400c:c09::232]:35882) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cxtNQ-0004S0-Lq for qemu-devel@nongnu.org; Tue, 11 Apr 2017 06:50:24 -0400 Received: by mail-wm0-x232.google.com with SMTP id o81so59948034wmb.1 for ; Tue, 11 Apr 2017 03:50:24 -0700 (PDT) Received: from zen.linaro.local ([81.128.185.34]) by smtp.gmail.com with ESMTPSA id m83sm1991589wmc.7.2017.04.11.03.50.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 11 Apr 2017 03:50:21 -0700 (PDT) Received: from zen.linaroharston (localhost [127.0.0.1]) by zen.linaro.local (Postfix) with ESMTP id 2941A3E1104; Tue, 11 Apr 2017 11:50:31 +0100 (BST) 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=3+ItvCVg4Q+5C479auMMsvRRi5WUusJmI6gBU6wcWo0=; b=XugZP31tfuhpHsFu4Nom05sDe+BH9hkq82+aXZjd0azOfVMFIntdAhPWdluT/4h1Ln YGu0yfO4vyW6qpMB1blsPNpbBXOYc/JqZRIDNTmerPhJiJEa+Qgm6E7//MIix8vIcKab 7T5nBLBeEDQNhIfgqZHrsA2/SF1y1uKgKN2es= 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=3+ItvCVg4Q+5C479auMMsvRRi5WUusJmI6gBU6wcWo0=; b=qYNeGq4puJH367OwQI2yrKeiqZQSkYmXFgpjH2/AnZLPkjunokzivaUWN4ShmcM2Ka 5YsPKlM1xOiliA5oxZr88Iym/JBM4em+2TgNK2S1bDemgE3yIfw2O+AvuvIqw5faWRr3 ezjBm16O7deu4I7fFyc8zSQGUec+uNeJ66GN90MPX6uJpL3IMmTS0MSnsBU71zwL4BPl vrilGCnPnWJar7RAizlJKNMbfSUvID8ZSpDXd3fBQWci3Cqgpsrkfg0taADyfGB15Bvp DGgnNog6WZjbvRlZ8cPt3tQcmGLIlqI8QQxJ3UxxxIDEAR2vcE+SrTe/UarLZM4gjyKe iXcQ== X-Gm-Message-State: AN3rC/5siujI9+x00+K4Wcw53c7GBnY5Oge8jdNd9rhNQRDieRpcK16p 1GRpX267FQHSmuwc X-Received: by 10.28.93.65 with SMTP id r62mr13612546wmb.77.1491907823425; Tue, 11 Apr 2017 03:50:23 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: bobby.prani@gmail.com, rth@twiddle.net, stefanha@redhat.com Date: Tue, 11 Apr 2017 11:50:29 +0100 Message-Id: <20170411105031.28904-2-alex.bennee@linaro.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170411105031.28904-1-alex.bennee@linaro.org> References: <20170411105031.28904-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a00:1450:400c:c09::232 Subject: [Qemu-devel] [PATCH v1 1/3] cputlb: fix and enhance TLB statistics 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: Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-devel@nongnu.org, Peter Crosthwaite Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 First this fixes the fact that statistics where only being updated if the build was built with DEBUG_TLB. Also it now counts the flush cases based on the degree of synchronisation required to run. This is a more useful discriminator for seeing what is slowing down the translation. Signed-off-by: Alex Benn=C3=A9e --- cputlb.c | 27 ++++++++++++++++++++++++--- include/exec/cputlb.h | 4 +++- translate-all.c | 4 +++- 3 files changed, 30 insertions(+), 5 deletions(-) diff --git a/cputlb.c b/cputlb.c index f5d056cc08..224863ed76 100644 --- a/cputlb.c +++ b/cputlb.c @@ -92,8 +92,13 @@ static void flush_all_helper(CPUState *src, run_on_cpu_f= unc fn, } } =20 -/* statistics */ -int tlb_flush_count; +/* Useful statistics - in rough order of expensiveness to the whole + * simulation. Synced flushes are the most expensive as all vCPUs need + * to be paused for the flush. + */ +int tlb_self_flush_count; /* from vCPU context */ +int tlb_async_flush_count; /* Deferred flush */ +int tlb_synced_flush_count; /* Synced flush, all vCPUs halted */ =20 /* This is OK because CPU architectures generally permit an * implementation to drop entries from the TLB at any time, so @@ -112,7 +117,6 @@ static void tlb_flush_nocheck(CPUState *cpu) } =20 assert_cpu_is_self(cpu); - tlb_debug("(count: %d)\n", tlb_flush_count++); =20 tb_lock(); =20 @@ -131,6 +135,7 @@ static void tlb_flush_nocheck(CPUState *cpu) =20 static void tlb_flush_global_async_work(CPUState *cpu, run_on_cpu_data dat= a) { + atomic_inc(&tlb_async_flush_count); tlb_flush_nocheck(cpu); } =20 @@ -143,6 +148,7 @@ void tlb_flush(CPUState *cpu) RUN_ON_CPU_NULL); } } else { + atomic_inc(&tlb_self_flush_count); tlb_flush_nocheck(cpu); } } @@ -157,6 +163,7 @@ void tlb_flush_all_cpus(CPUState *src_cpu) void tlb_flush_all_cpus_synced(CPUState *src_cpu) { const run_on_cpu_func fn =3D tlb_flush_global_async_work; + atomic_inc(&tlb_synced_flush_count); flush_all_helper(src_cpu, fn, RUN_ON_CPU_NULL); async_safe_run_on_cpu(src_cpu, fn, RUN_ON_CPU_NULL); } @@ -168,6 +175,7 @@ static void tlb_flush_by_mmuidx_async_work(CPUState *cp= u, run_on_cpu_data data) int mmu_idx; =20 assert_cpu_is_self(cpu); + atomic_inc(&tlb_async_flush_count); =20 tb_lock(); =20 @@ -206,6 +214,7 @@ void tlb_flush_by_mmuidx(CPUState *cpu, uint16_t idxmap) RUN_ON_CPU_HOST_INT(pending_flushes)); } } else { + atomic_inc(&tlb_self_flush_count); tlb_flush_by_mmuidx_async_work(cpu, RUN_ON_CPU_HOST_INT(idxmap)); } @@ -219,6 +228,7 @@ void tlb_flush_by_mmuidx_all_cpus(CPUState *src_cpu, ui= nt16_t idxmap) =20 flush_all_helper(src_cpu, fn, RUN_ON_CPU_HOST_INT(idxmap)); fn(src_cpu, RUN_ON_CPU_HOST_INT(idxmap)); + atomic_inc(&tlb_self_flush_count); } =20 void tlb_flush_by_mmuidx_all_cpus_synced(CPUState *src_cpu, @@ -230,6 +240,7 @@ void tlb_flush_by_mmuidx_all_cpus_synced(CPUState *src_= cpu, =20 flush_all_helper(src_cpu, fn, RUN_ON_CPU_HOST_INT(idxmap)); async_safe_run_on_cpu(src_cpu, fn, RUN_ON_CPU_HOST_INT(idxmap)); + atomic_inc(&tlb_synced_flush_count); } =20 =20 @@ -282,6 +293,8 @@ static void tlb_flush_page_async_work(CPUState *cpu, ru= n_on_cpu_data data) } =20 tb_flush_jmp_cache(cpu, addr); + + atomic_inc(&tlb_async_flush_count); } =20 void tlb_flush_page(CPUState *cpu, target_ulong addr) @@ -293,6 +306,7 @@ void tlb_flush_page(CPUState *cpu, target_ulong addr) RUN_ON_CPU_TARGET_PTR(addr)); } else { tlb_flush_page_async_work(cpu, RUN_ON_CPU_TARGET_PTR(addr)); + atomic_inc(&tlb_self_flush_count); } } =20 @@ -329,6 +343,7 @@ static void tlb_flush_page_by_mmuidx_async_work(CPUStat= e *cpu, } =20 tb_flush_jmp_cache(cpu, addr); + atomic_inc(&tlb_async_flush_count); } =20 static void tlb_check_page_and_flush_by_mmuidx_async_work(CPUState *cpu, @@ -351,6 +366,7 @@ static void tlb_check_page_and_flush_by_mmuidx_async_wo= rk(CPUState *cpu, RUN_ON_CPU_HOST_INT(mmu_idx_bitmap)= ); } else { tlb_flush_page_by_mmuidx_async_work(cpu, data); + atomic_inc(&tlb_self_flush_count); } } =20 @@ -370,6 +386,7 @@ void tlb_flush_page_by_mmuidx(CPUState *cpu, target_ulo= ng addr, uint16_t idxmap) } else { tlb_check_page_and_flush_by_mmuidx_async_work( cpu, RUN_ON_CPU_TARGET_PTR(addr_and_mmu_idx)); + atomic_inc(&tlb_self_flush_count); } } =20 @@ -387,6 +404,7 @@ void tlb_flush_page_by_mmuidx_all_cpus(CPUState *src_cp= u, target_ulong addr, =20 flush_all_helper(src_cpu, fn, RUN_ON_CPU_TARGET_PTR(addr_and_mmu_idx)); fn(src_cpu, RUN_ON_CPU_TARGET_PTR(addr_and_mmu_idx)); + atomic_inc(&tlb_self_flush_count); } =20 void tlb_flush_page_by_mmuidx_all_cpus_synced(CPUState *src_cpu, @@ -404,6 +422,7 @@ void tlb_flush_page_by_mmuidx_all_cpus_synced(CPUState = *src_cpu, =20 flush_all_helper(src_cpu, fn, RUN_ON_CPU_TARGET_PTR(addr_and_mmu_idx)); async_safe_run_on_cpu(src_cpu, fn, RUN_ON_CPU_TARGET_PTR(addr_and_mmu_= idx)); + atomic_inc(&tlb_synced_flush_count); } =20 void tlb_flush_page_all_cpus(CPUState *src, target_ulong addr) @@ -412,6 +431,7 @@ void tlb_flush_page_all_cpus(CPUState *src, target_ulon= g addr) =20 flush_all_helper(src, fn, RUN_ON_CPU_TARGET_PTR(addr)); fn(src, RUN_ON_CPU_TARGET_PTR(addr)); + atomic_inc(&tlb_self_flush_count); } =20 void tlb_flush_page_all_cpus_synced(CPUState *src, @@ -421,6 +441,7 @@ void tlb_flush_page_all_cpus_synced(CPUState *src, =20 flush_all_helper(src, fn, RUN_ON_CPU_TARGET_PTR(addr)); async_safe_run_on_cpu(src, fn, RUN_ON_CPU_TARGET_PTR(addr)); + atomic_inc(&tlb_synced_flush_count); } =20 /* update the TLBs so that writes to code in the virtual page 'addr' diff --git a/include/exec/cputlb.h b/include/exec/cputlb.h index 3f941783c5..5085384014 100644 --- a/include/exec/cputlb.h +++ b/include/exec/cputlb.h @@ -23,7 +23,9 @@ /* cputlb.c */ void tlb_protect_code(ram_addr_t ram_addr); void tlb_unprotect_code(ram_addr_t ram_addr); -extern int tlb_flush_count; +extern int tlb_self_flush_count; +extern int tlb_async_flush_count; +extern int tlb_synced_flush_count; =20 #endif #endif diff --git a/translate-all.c b/translate-all.c index b3ee876526..0578ae6123 100644 --- a/translate-all.c +++ b/translate-all.c @@ -1927,7 +1927,9 @@ void dump_exec_info(FILE *f, fprintf_function cpu_fpr= intf) atomic_read(&tcg_ctx.tb_ctx.tb_flush_count)); cpu_fprintf(f, "TB invalidate count %d\n", tcg_ctx.tb_ctx.tb_phys_invalidate_count); - cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count); + cpu_fprintf(f, "TLB flush counts self:%d async:%d synced:%d\n", + tlb_self_flush_count, tlb_async_flush_count, + tlb_synced_flush_count); tcg_dump_info(f, cpu_fprintf); =20 tb_unlock(); --=20 2.11.0 From nobody Sat Apr 27 22:10:21 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; dkim=fail spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 14919079242371004.5115172195622; Tue, 11 Apr 2017 03:52:04 -0700 (PDT) Received: from localhost ([::1]:38438 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cxtOz-0004Oz-KI for importer@patchew.org; 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Tue, 11 Apr 2017 03:50:24 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: bobby.prani@gmail.com, rth@twiddle.net, stefanha@redhat.com Date: Tue, 11 Apr 2017 11:50:30 +0100 Message-Id: <20170411105031.28904-3-alex.bennee@linaro.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170411105031.28904-1-alex.bennee@linaro.org> References: <20170411105031.28904-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:400c:c0c::233 Subject: [Qemu-devel] [PATCH v1 2/3] cpus: dump TLB flush counts as trace event 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: Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-devel@nongnu.org, Peter Crosthwaite Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 This can be pre-processed later from the trace file. Signed-off-by: Alex Benn=C3=A9e --- cpus.c | 6 ++++++ trace-events | 3 +++ 2 files changed, 9 insertions(+) diff --git a/cpus.c b/cpus.c index 740b8dc3f8..fae7344df5 100644 --- a/cpus.c +++ b/cpus.c @@ -50,6 +50,8 @@ #include "qapi-event.h" #include "hw/nmi.h" #include "sysemu/replay.h" +#include "exec/cputlb.h" +#include "trace-root.h" =20 #ifdef CONFIG_LINUX =20 @@ -1252,6 +1254,10 @@ static int tcg_cpu_exec(CPUState *cpu) int64_t ti; #endif =20 + trace_tlb_flush_stats(tlb_self_flush_count, + tlb_async_flush_count, + tlb_synced_flush_count); + #ifdef CONFIG_PROFILER ti =3D profile_getclock(); #endif diff --git a/trace-events b/trace-events index b07a09ba95..fc23e15d25 100644 --- a/trace-events +++ b/trace-events @@ -94,6 +94,9 @@ disable exec_tb(void *tb, uintptr_t pc) "tb:%p pc=3D0x%"P= RIxPTR disable exec_tb_nocache(void *tb, uintptr_t pc) "tb:%p pc=3D0x%"PRIxPTR disable exec_tb_exit(void *last_tb, unsigned int flags) "tb:%p flags=3D%x" =20 +# cpus.c +tlb_flush_stats(int self, int async, int synced) "self:%d async:%d synced:= %d" + # translate-all.c translate_block(void *tb, uintptr_t pc, uint8_t *tb_code) "tb:%p, pc:0x%"P= RIxPTR", tb_code:%p" =20 --=20 2.11.0 From nobody Sat Apr 27 22:10:21 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; 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charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a00:1450:400c:c09::22c Subject: [Qemu-devel] [PATCH v1 3/3] new script/analyse-tlb-flushes-simpletrace.py 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: =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 This is a simple helper script to extract TLB flush stats from the a simpletrace file and plot the results. Signed-off-by: Alex Benn=C3=A9e --- scripts/analyse-tlb-flushes-simpletrace.py | 62 ++++++++++++++++++++++++++= ++++ 1 file changed, 62 insertions(+) create mode 100755 scripts/analyse-tlb-flushes-simpletrace.py diff --git a/scripts/analyse-tlb-flushes-simpletrace.py b/scripts/analyse-t= lb-flushes-simpletrace.py new file mode 100755 index 0000000000..9a1191c154 --- /dev/null +++ b/scripts/analyse-tlb-flushes-simpletrace.py @@ -0,0 +1,62 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# +# Generate a simple graph of flushes over time +# +# Author: Alex Benn=C3=A9e +# + +import os +import simpletrace +import argparse +import numpy as np +import matplotlib.pyplot as plt + +class CpuTLBFlushAnalyser(simpletrace.Analyzer): + "A simpletrace Analyser for extracting flush stats." + + def __init__(self): + self.stats =3D 0 + self.timestamps =3D [] + self.flush_self =3D [] + self.flush_async =3D [] + self.flush_synced =3D [] + + + def tlb_flush_stats(self, timestamp, flush_self, flush_async, flush_sy= nced): + "Match for tlb_flush_stats event. Appends counts to the relevant a= rray." + self.timestamps.append(timestamp) + self.flush_self.append(flush_self) + self.flush_async.append(flush_async) + self.flush_synced.append(flush_synced) + self.stats +=3D 1 + + +def get_args(): + "Grab options" + parser =3D argparse.ArgumentParser() + parser.add_argument("--output", "-o", type=3Dstr, help=3D"Render plot = to file") + parser.add_argument("events", type=3Dstr, help=3D'trace file read from= ') + parser.add_argument("tracefile", type=3Dstr, help=3D'trace file read f= rom') + return parser.parse_args() + +if __name__ =3D=3D '__main__': + args =3D get_args() + + # Gather data from the trace + analyzer =3D CpuTLBFlushAnalyser() + simpletrace.process(args.events, args.tracefile, analyzer) + +# x =3D np.arange(analyzer.stats) + fself, =3D plt.plot(analyzer.timestamps, analyzer.flush_self, label=3D= "Self") + fasync, =3D plt.plot(analyzer.timestamps, analyzer.flush_async, label= =3D"Async") + fsynced, =3D plt.plot(analyzer.timestamps, analyzer.flush_synced, labe= l=3D"Synced") + + plt.legend(handles=3D[fself, fasync, fsynced]) + plt.xlabel("Execution Time") + plt.ylabel("Culmlative count") + + if args.output: + plt.savefig(args.output) + else: + plt.show() --=20 2.11.0