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Wed, 12 May 2021 10:40:13 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Shivank Garg Date: Wed, 12 May 2021 23:09:57 +0530 Message-ID: Subject: Re: Profiling execution time for __alloc_pages_nodemask To: Yang Shi Cc: David Hildenbrand , Linux MM , Andrew Morton , Linux Kernel Mailing List , gregkh@linuxfoundation.org, sergey.senozhatsky@gmail.com, pmladek@suse.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 48266500153D Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=Utcd2QRx; spf=pass (imf01.hostedemail.com: domain of shivankgarg98@gmail.com designates 209.85.208.51 as permitted sender) smtp.mailfrom=shivankgarg98@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam04 X-Stat-Signature: dq8d31txxqp8qxfhkeiwujzxu9ocacf6 Received-SPF: none (gmail.com>: No applicable sender policy available) receiver=imf01; identity=mailfrom; envelope-from=""; helo=mail-ed1-f51.google.com; client-ip=209.85.208.51 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1620841211-994657 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000004, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: >> Actually, I want to record the arguments for the memory allocator and >> filter out the calls I don't need (which are creating noise). >> For instance, I'm only interested in particular order and flags. >BPF can do so too. You can either attach to kprobe or tracepoint, then >filter out the calls by the function's parameters or tracepoint's >fields. Thanks Yang for the suggestion, I'll try the BPF. Anyway my problem was solved by the filter in custom tracepoints (for instance, tracing/events/kmem/filter). Also, I used trace_*_enabled() to first check if tracepoint is enabled and take ktime_get() only after that. This solved my initial issue. Thanks David, Yang and the Linux community for helping me identify my issue and solve it. Best Regards, Shivank