linux-kernel - Re: [PATCH v2 0/4] tools/rtla: Consolidate nr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <95b45cb5db8d3f3b8202eff5c754e4c0c95769de.camel@redhat.com>
Date: Tue, 10 Feb 2026 15:07:00 -0600
From: Crystal Wood <crwood@...hat.com>
To: Costa Shulyupin <costa.shul@...hat.com>, Steven Rostedt	
 <rostedt@...dmis.org>, Tomas Glozar <tglozar@...hat.com>, Wander Lairson
 Costa	 <wander@...hat.com>, Ivan Pravdin <ipravdin.official@...il.com>,
 John Kacur	 <jkacur@...hat.com>, Tiezhu Yang <yangtiezhu@...ngson.cn>, 
	linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	bpf@...r.kernel.org
Subject: Re: [PATCH v2 0/4] tools/rtla: Consolidate nr_cpus usage

On Mon, 2026-02-09 at 11:24 +0200, Costa Shulyupin wrote:
> 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(-)

Reviewed-by: Crystal Wood <crwood@...hat.com>

-Crystal