From patchwork Wed Apr 24 21:52:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13642545 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 3B6F015696E; Wed, 24 Apr 2024 21:52:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713995537; cv=none; b=orZZJXep5lOA2mjXGc8beaxLHuyg5Pt7OAfUeTBcHmsdv4bEM9EVNkxG16LZ2x8ua0IQV81jXvOidLhse6JOb7ZtfRMq0S6Y8/855pau0SemlpdVXjPzG0TB6veO5sfXZ+U8chJgZ8rnc03p37yf7lXJYM3eveoJJdBSrNntdFQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713995537; c=relaxed/simple; bh=G+aiURc6urfG9PgQAVrHhTuXKO9sTzZPh56yF80XjI0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=lu9HawoeWsvKdCo2EmqQGaG0Ar9z9cxATCW0jTGgS0OcVf7NIYgsdg4bs2AFd6dUw4CxnBPD6+edgsyMeQ9pvJo3p3c+lFmdTib6p0BS9wc71R/TKWDYUT/HckrEIxK0XBffYkiuPrQek98hOc5ZJ1tGj04ZB1xm+sgiEugiwtI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PUoMbTmB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PUoMbTmB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AEB19C113CD; Wed, 24 Apr 2024 21:52:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713995536; bh=G+aiURc6urfG9PgQAVrHhTuXKO9sTzZPh56yF80XjI0=; h=From:To:Cc:Subject:Date:From; b=PUoMbTmB8LjyNGdqt4lW1GKgaSmHjyrqGSRl2RvJcnWjk3cPAvOoI5NZGXrYcUw60 qNF8kRDDAUGu5mHv8vAGOsAi8ZncRP8giwHDqkM8ApH6YwjEqNvENOscqDeYPTj/ff BkS9bOkzBtHitpab2SRjJY4GNb7Uurr8ka05zCNKkMzQUj5FrSGXMyzl4yr3pKOK1/ DkBvZerqlTTDk1mumBvHQdkA3vNSWlQrKYgzvY9jxt8e4zZPAyHUzwcma2phqv3eyb ZPy9zAf8fx36EH0gerbBRHAqsLzD8Zerc5b75gOumnGvEAlSqxVa8Er6DDbk6CmYG9 //q+EsZ7mreSA== From: Andrii Nakryiko To: linux-trace-kernel@vger.kernel.org, rostedt@goodmis.org, mhiramat@kernel.org Cc: bpf@vger.kernel.org, Andrii Nakryiko Subject: [PATCH 0/2] Objpool performance improvements Date: Wed, 24 Apr 2024 14:52:12 -0700 Message-ID: <20240424215214.3956041-1-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Improve objpool (used heavily in kretprobe hot path) performance with two improvements: - inlining performance critical objpool_push()/objpool_pop() operations; - avoiding re-calculating relatively expensive nr_possible_cpus(). These opportunities were found when benchmarking and profiling kprobes and kretprobes with BPF-based benchmarks. See individual patches for details and results. Andrii Nakryiko (2): objpool: enable inlining objpool_push() and objpool_pop() operations objpool: cache nr_possible_cpus() and avoid caching nr_cpu_ids include/linux/objpool.h | 105 +++++++++++++++++++++++++++++++++++-- lib/objpool.c | 112 +++------------------------------------- 2 files changed, 107 insertions(+), 110 deletions(-)