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Fri, 13 Feb 2026 03:52:53 -0800 (PST) Received: from costa-tp.bos2.lab ([2a00:a041:e223:1b00:fe51:8bb:7986:c897]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4834d835f6bsm234671275e9.14.2026.02.13.03.52.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Feb 2026 03:52:53 -0800 (PST) From: Costa Shulyupin To: Steven Rostedt , Tomas Glozar , Costa Shulyupin , Crystal Wood , Wander Lairson Costa , Ivan Pravdin , John Kacur , Tiezhu Yang , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH v3 0/5] tools/rtla: Consolidate nr_cpus usage Date: Fri, 13 Feb 2026 13:52:29 +0200 Message-ID: <20260213115234.430232-1-costa.shul@redhat.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit sysconf(_SC_NPROCESSORS_CONF) (via get_nprocs_conf) reflects cpu_possible_mask, which is fixed at boot time, so querying it repeatedly is unnecessary. Replace multiple calls to sysconf(_SC_NPROCESSORS_CONF) with a single global nr_cpus variable initialized once at startup. V3: - Remove unneeded cpus parameter from timerlat BPF functions as requested by Wander Costa. v2: - Add `#pragma once` in timerlat_u.h to avoid redefinition errors with pre-C23 compilers. Costa Shulyupin (5): tools/rtla: Consolidate nr_cpus usage across all tools tools/rtla: Remove unneeded nr_cpus arguments tools/rtla: Remove unneeded nr_cpus members tools/rtla: Remove unneeded nr_cpus from for_each_monitored_cpu tools/rtla: Remove unneeded cpus parameter from timerlat BPF functions tools/tracing/rtla/src/common.c | 7 ++- tools/tracing/rtla/src/common.h | 4 +- tools/tracing/rtla/src/osnoise_hist.c | 26 +++++------ tools/tracing/rtla/src/osnoise_top.c | 16 ++----- tools/tracing/rtla/src/timerlat.c | 9 ++-- tools/tracing/rtla/src/timerlat_aa.c | 11 ++--- tools/tracing/rtla/src/timerlat_bpf.c | 19 ++++---- tools/tracing/rtla/src/timerlat_bpf.h | 12 ++--- tools/tracing/rtla/src/timerlat_hist.c | 62 +++++++++++--------------- tools/tracing/rtla/src/timerlat_top.c | 47 +++++++------------ tools/tracing/rtla/src/timerlat_u.c | 9 ++-- tools/tracing/rtla/src/timerlat_u.h | 1 + tools/tracing/rtla/src/utils.c | 10 +---- 13 files changed, 88 insertions(+), 145 deletions(-) -- 2.52.0