From: Costa Shulyupin <costa.shul@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>,
Tomas Glozar <tglozar@redhat.com>,
Costa Shulyupin <costa.shul@redhat.com>,
Crystal Wood <crwood@redhat.com>,
Wander Lairson Costa <wander@redhat.com>,
Ivan Pravdin <ipravdin.official@gmail.com>,
John Kacur <jkacur@redhat.com>,
Tiezhu Yang <yangtiezhu@loongson.cn>,
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 [thread overview]
Message-ID: <20260209092436.2899888-1-costa.shul@redhat.com> (raw)
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
next reply other threads:[~2026-02-09 9:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-09 9:24 Costa Shulyupin [this message]
2026-02-09 9:24 ` [PATCH v2 1/4] tools/rtla: Consolidate nr_cpus usage across all tools Costa Shulyupin
2026-02-11 11:03 ` Wander Lairson Costa
2026-02-11 11:15 ` Tomas Glozar
2026-02-09 9:24 ` [PATCH v2 2/4] tools/rtla: Remove unneeded nr_cpus arguments Costa Shulyupin
2026-02-11 11:03 ` Wander Lairson Costa
2026-02-09 9:24 ` [PATCH v2 3/4] tools/rtla: Remove unneeded nr_cpus members Costa Shulyupin
2026-02-09 9:24 ` [PATCH v2 4/4] tools/rtla: Remove unneeded nr_cpus from for_each_monitored_cpu Costa Shulyupin
2026-02-10 21:07 ` [PATCH v2 0/4] tools/rtla: Consolidate nr_cpus usage Crystal Wood
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