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Mon, 09 Feb 2026 01:24:47 -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 v2 0/4] tools/rtla: Consolidate nr_cpus usage Date: Mon, 9 Feb 2026 11:24:32 +0200 Message-ID: <20260209092436.2899888-1-costa.shul@redhat.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: bpf@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. v2: - Add `#pragma once` in timerlat_u.h to avoid redefinition errors with pre-C23 compilers. Costa Shulyupin (4): 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/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 | 5 +-- tools/tracing/rtla/src/timerlat_bpf.h | 6 +-- 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, 80 insertions(+), 133 deletions(-) -- 2.52.0