From mboxrd@z Thu Jan 1 00:00:00 1970 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 71133C02198 for ; Mon, 3 Feb 2025 21:16:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=zn842Fm2SvvoNPi7A8bTdA+SWs8V2Ex9Kn5BCkaIK+k=; b=3l1o/GgGbK7yHvIBIUf9aa2CdR +VVrr4LDgRiQ2+M+SFTVWnHyeIC2zG9Oa9+gyKGKcBzuoR3Qr26BNnqxRa0A3SMPEL7eP3ghUy60h PeLxuFWexHi4KWiQPHkqEylTSAXzfKayMPLk8hJw6RFs8iZabuDZi2IR8rlSWSiQigkTFgw/BgOSQ xTbQuQOzUtmyFLHdsGiJICkILmueRym4u6HLX38mFiBTlg0SVXvqJYckLalaEUOtrHkuRv/MlwLMj DEU0QFJfqZ1I2UnA8dqA9NxB9hS9buHbLxtypl3VRNIKw/QCYBapv/BMPe+S3XPvymVzu9V+ycxkd PQa0u4GQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tf3nP-0000000GdKg-1fjg; Mon, 03 Feb 2025 21:15:55 +0000 Received: from mail-pj1-f66.google.com ([209.85.216.66]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tf2iY-0000000GVjv-0gW6 for linux-arm-kernel@lists.infradead.org; Mon, 03 Feb 2025 20:06:52 +0000 Received: by mail-pj1-f66.google.com with SMTP id 98e67ed59e1d1-2eec9b3a1bbso6323005a91.3 for ; Mon, 03 Feb 2025 12:06:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1738613209; x=1739218009; darn=lists.infradead.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=zn842Fm2SvvoNPi7A8bTdA+SWs8V2Ex9Kn5BCkaIK+k=; b=wSTIOUkxubZfRKs21LcsV2PbP8zWmcTD0csTzOD0ylfcHI4EGYP8ypKz3Y+YbYGWZd JZrOkpPhN/0SuCHFjcdz7d2zlcFQUDwctG4q4rJd5dlqzFeLZ25LY7e/U88QM6MPPrF+ g2vGAMs7S3kzOiyyQK4GqkBMfBR6m0GWuHRoQA8JjdHkHOjWnk0ahp1/h3ZdPEMMN2dz oqiPVWMAQfwQr1zQ0AIE1s4hZlBh1zS1zadJKy/Gd70vuoZ2FuPrZqs7y2bn/QUbmhtV QHd66DhGesl7pUdFWIYOuxRHthJnZnRaH4egBcSwqT+jX+mOkEHedHlhj/DOvTXT3i7+ 6S4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738613209; x=1739218009; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=zn842Fm2SvvoNPi7A8bTdA+SWs8V2Ex9Kn5BCkaIK+k=; b=Wsibv1pNOB/Rbyw0xiJlCjn2Gh5e3xmhvmb0f5YA8pPTvPB/U5EaccDsBaJd+/1cdC FOh4ji6V0tl6gL7VAt0Er5xe/nzp3tEd7Ii4nGyVn1Gj05yBgof2ncG9YwyfI6P7trkU 35JFX9vr3EX3MD26aQ/CovIIx14PS9fyv72T8JBczpY4/uOVNZAylmMgvik2nhGZUcHj k4fjqI1i9CRBwmnDJdFHbxtzxurh2QQx23y9jzo7m0mRSw2VKI8+RP58pr5qRiEYzCd8 RoAq8RhJB/17g/ayZ5WFUiuAq5tswstmZzIzQ0uBBs3ZOaFIWPcH5bqcZ0ObGG4/2avk x9iw== X-Forwarded-Encrypted: i=1; AJvYcCVxgxKqEBx2hWvQiR0sHhmfoLSWSCEASgYvFcyf6b/f+IG1HASlpQxwReezNSSYJeTW8H0YeLyicfPe2jLr6i3q@lists.infradead.org X-Gm-Message-State: AOJu0YwHlqUP4EjpiJM2JMPLVq17eZ2ngWW3plBYGqL0yU+N2nnM0nzK hwZaeGM5IMAKzA5J3AVXWfGhfL4qcvzxqXA3K3OndNQ848KDV0tIa1BAQD3LQAc= X-Gm-Gg: ASbGnctSukEBx15C5am9iMIqS/7E07mJi5a2FwbR2oLDbYtS81dFAGwQDmqJ15GSm3u YPDS7hUUb4icntJSRMBEgv3pQz4j3ECj5ajGH2x288KbNRC65vPeA3qrEEIUSdmnyKANLJo4aM0 K89gtyx7kZC2k7VLcxKl81vz95dHNigLUb//vxUHb8RuKiK1oCORYZh27ylYIYUPcUtS5uJynuv MZcWV+8VL9VIWhoZKe9YYyswZ+ikEivOigrMinnXSWfUclcA/6ahNztKP5LIkXJN6j1Pu9QwKHW y68H6r4LM7I= X-Google-Smtp-Source: AGHT+IGS8njPUir6FnFenAdtBINMEb+gIsqCrIFalq62SUNtJzt7ER4ln9yxJJRFPrJv3bhAJTVV+Q== X-Received: by 2002:a17:90b:4b88:b0:2f4:9e8b:6aad with SMTP id 98e67ed59e1d1-2f83aa804cfmr41636277a91.0.1738613209064; Mon, 03 Feb 2025 12:06:49 -0800 (PST) Received: from ghost ([2601:647:6700:64d0:4f63:f9d5:2cbd:2947]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2f83bccc8bcsm11799434a91.13.2025.02.03.12.06.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 12:06:48 -0800 (PST) Date: Mon, 3 Feb 2025 12:06:45 -0800 From: Charlie Jenkins To: Ian Rogers Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Adrian Hunter , Kan Liang , John Garry , Will Deacon , James Clark , Mike Leach , Leo Yan , Guo Ren , Paul Walmsley , Palmer Dabbelt , Albert Ou , Bibo Mao , Arnd Bergmann , Huacai Chen , Catalin Marinas , Jiri Slaby , =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= , Howard Chu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH v1 0/7] perf: Support multiple system call tables in the build Message-ID: References: <20250201071455.718247-1-irogers@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250203_120650_475678_28CA9C49 X-CRM114-Status: GOOD ( 48.41 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Feb 03, 2025 at 11:39:01AM -0800, Ian Rogers wrote: > On Mon, Feb 3, 2025 at 11:15 AM Charlie Jenkins wrote: > > > > On Mon, Feb 03, 2025 at 11:10:49AM -0800, Ian Rogers wrote: > > > On Mon, Feb 3, 2025 at 11:02 AM Charlie Jenkins wrote: > > > > > > > > On Fri, Jan 31, 2025 at 11:14:48PM -0800, Ian Rogers wrote: > > > > > This work builds on the clean up of system call tables and removal of > > > > > libaudit by Charlie Jenkins . > > > > > > > > > > The system call table in perf trace is used to map system call numbers > > > > > to names and vice versa. Prior to these changes, a single table > > > > > matching the perf binary's build was present. The table would be > > > > > incorrect if tracing say a 32-bit binary from a 64-bit version of > > > > > perf, the names and numbers wouldn't match. > > > > > > > > > > Change the build so that a single system call file is built and the > > > > > potentially multiple tables are identifiable from the ELF machine type > > > > > of the process being examined. To determine the ELF machine type, the > > > > > executable's header is read from /proc/pid/exe with fallbacks to using > > > > > the perf's binary type when unknown. > > > > > > > > > > Remove some runtime types used by the system call tables and make > > > > > equivalents generated at build time. > > > > > > > > Our approaches are very different but I sent out a patch to do this a > > > > couple of weeks ago [1]. > > > > > > > > Did you look at that and decide you didn't like the approach? > > > > > > Missing link? > > > > Whoops here is the link: > > > > https://lore.kernel.org/all/20250114-perf_syscall_arch_runtime-v1-1-5b304e408e11@rivosinc.com/ > > I agree it is similar and progress, I think I prefer my changes :-) > > Anything in the arch directories is only going to be built given a > Makefile SRCARCH: > https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/tree/tools/perf/arch/Build?h=perf-tools-next#n2 > which means if we want the system call tables for say ARM on x86-64 we > need to reinvent the build - this isn't a problem today but perhaps > something to consider if we wanted a cross-architecture perf trace > record. I'd like to do away entirely with the arch directory for this > kind of reason. For example, if we run perf on a user space emulator > (say a testing set up) and it sees AMD data fabric PMUs, logic for > those PMUs currently lives in the arch directory for x86 and likely > wasn't even built into the perf tool. We should be able to identify > PMUs and act accordingly based on their names. In the case of the > overloaded "cpu" PMU we can identify it with the CPUID. The less code > in arch and the fewer architecture ifdefs, the better things should > work cross-architecture, in testing scenarios, etc. We also win by > getting code coverage without, for example, having to build and test > on csky or super H. > > Your changes are using the string for the architecture name. I think > that string is something we should get rid of: > https://lore.kernel.org/lkml/CAP-5=fX2BtFzhGLCSqO1QszqfX=HT8RrTdG_5Ttp5Gw4seSstA@mail.gmail.com/ > but there's no reason we couldn't clean that up on top of your change. Yes that part is not ideal. > > The build with lots of separate Build/Makefiles is something of a pain > to port/maintain in a bazel version of the build I maintain at Google > (happy to open source if anyone cares). In these changes you just run > a big script and get a big header file out the end, which largely > matches the other perf trace beauty things we build. Fair enough! I wanted to mimic how the kernel was building the syscall tables as closely as possible, it's convenient to have cohesion. What is the usecase for the bazel version? - Charlie > > Thanks, > Ian > > > > > > > The patches generating a syscall(_32|_64)?.h landed. These changes > > > take your changes and make it so that we just run the script once > > > building a header file for all architectures. On x86 we then have the > > > tables be guarded by ifdefs on i386 and x86-64. Then rather than the > > > table just matching the host architecture the ELF machine is used for > > > the executable running. > > > > > > Thanks, > > > Ian > > > > > > > - Charlie > > > > > > > > > > > > > > Ian Rogers (7): > > > > > perf syscalltble: Remove syscall_table.h > > > > > perf trace: Reorganize syscalls > > > > > perf syscalltbl: Remove struct syscalltbl > > > > > perf thread: Add support for reading the e_machine type for a thread > > > > > perf trace beauty: Add syscalltbl.sh generating all system call tables > > > > > perf syscalltbl: Use lookup table containing multiple architectures > > > > > perf build: Remove Makefile.syscalls > > > > > > > > > > tools/perf/Makefile.perf | 10 +- > > > > > tools/perf/arch/alpha/entry/syscalls/Kbuild | 2 - > > > > > .../alpha/entry/syscalls/Makefile.syscalls | 5 - > > > > > tools/perf/arch/alpha/include/syscall_table.h | 2 - > > > > > tools/perf/arch/arc/entry/syscalls/Kbuild | 2 - > > > > > .../arch/arc/entry/syscalls/Makefile.syscalls | 3 - > > > > > tools/perf/arch/arc/include/syscall_table.h | 2 - > > > > > tools/perf/arch/arm/entry/syscalls/Kbuild | 4 - > > > > > .../arch/arm/entry/syscalls/Makefile.syscalls | 2 - > > > > > tools/perf/arch/arm/include/syscall_table.h | 2 - > > > > > tools/perf/arch/arm64/entry/syscalls/Kbuild | 3 - > > > > > .../arm64/entry/syscalls/Makefile.syscalls | 6 - > > > > > tools/perf/arch/arm64/include/syscall_table.h | 8 - > > > > > tools/perf/arch/csky/entry/syscalls/Kbuild | 2 - > > > > > .../csky/entry/syscalls/Makefile.syscalls | 3 - > > > > > tools/perf/arch/csky/include/syscall_table.h | 2 - > > > > > .../perf/arch/loongarch/entry/syscalls/Kbuild | 2 - > > > > > .../entry/syscalls/Makefile.syscalls | 3 - > > > > > .../arch/loongarch/include/syscall_table.h | 2 - > > > > > tools/perf/arch/mips/entry/syscalls/Kbuild | 2 - > > > > > .../mips/entry/syscalls/Makefile.syscalls | 5 - > > > > > tools/perf/arch/mips/include/syscall_table.h | 2 - > > > > > tools/perf/arch/parisc/entry/syscalls/Kbuild | 3 - > > > > > .../parisc/entry/syscalls/Makefile.syscalls | 6 - > > > > > .../perf/arch/parisc/include/syscall_table.h | 8 - > > > > > tools/perf/arch/powerpc/entry/syscalls/Kbuild | 3 - > > > > > .../powerpc/entry/syscalls/Makefile.syscalls | 6 - > > > > > .../perf/arch/powerpc/include/syscall_table.h | 8 - > > > > > tools/perf/arch/riscv/entry/syscalls/Kbuild | 2 - > > > > > .../riscv/entry/syscalls/Makefile.syscalls | 4 - > > > > > tools/perf/arch/riscv/include/syscall_table.h | 8 - > > > > > tools/perf/arch/s390/entry/syscalls/Kbuild | 2 - > > > > > .../s390/entry/syscalls/Makefile.syscalls | 5 - > > > > > tools/perf/arch/s390/include/syscall_table.h | 2 - > > > > > tools/perf/arch/sh/entry/syscalls/Kbuild | 2 - > > > > > .../arch/sh/entry/syscalls/Makefile.syscalls | 4 - > > > > > tools/perf/arch/sh/include/syscall_table.h | 2 - > > > > > tools/perf/arch/sparc/entry/syscalls/Kbuild | 3 - > > > > > .../sparc/entry/syscalls/Makefile.syscalls | 5 - > > > > > tools/perf/arch/sparc/include/syscall_table.h | 8 - > > > > > tools/perf/arch/x86/entry/syscalls/Kbuild | 3 - > > > > > .../arch/x86/entry/syscalls/Makefile.syscalls | 6 - > > > > > tools/perf/arch/x86/include/syscall_table.h | 8 - > > > > > tools/perf/arch/xtensa/entry/syscalls/Kbuild | 2 - > > > > > .../xtensa/entry/syscalls/Makefile.syscalls | 4 - > > > > > .../perf/arch/xtensa/include/syscall_table.h | 2 - > > > > > tools/perf/builtin-trace.c | 275 +++++++++++------- > > > > > tools/perf/scripts/Makefile.syscalls | 61 ---- > > > > > tools/perf/scripts/syscalltbl.sh | 86 ------ > > > > > tools/perf/trace/beauty/syscalltbl.sh | 274 +++++++++++++++++ > > > > > tools/perf/util/syscalltbl.c | 142 ++++----- > > > > > tools/perf/util/syscalltbl.h | 22 +- > > > > > tools/perf/util/thread.c | 50 ++++ > > > > > tools/perf/util/thread.h | 14 +- > > > > > 54 files changed, 598 insertions(+), 506 deletions(-) > > > > > delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/alpha/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/arc/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/arc/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/arc/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/arm/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/arm/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/arm/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/arm64/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/csky/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/csky/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/csky/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/loongarch/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/mips/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/mips/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/mips/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/parisc/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/powerpc/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/riscv/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/s390/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/s390/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/s390/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/sh/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/sh/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/sh/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/sparc/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/x86/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/x86/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/x86/include/syscall_table.h > > > > > delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Kbuild > > > > > delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls > > > > > delete mode 100644 tools/perf/arch/xtensa/include/syscall_table.h > > > > > delete mode 100644 tools/perf/scripts/Makefile.syscalls > > > > > delete mode 100755 tools/perf/scripts/syscalltbl.sh > > > > > create mode 100755 tools/perf/trace/beauty/syscalltbl.sh > > > > > > > > > > -- > > > > > 2.48.1.362.g079036d154-goog > > > > >