From nobody Sun Feb 8 01:21:23 2026 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1B5F22367B0 for ; Tue, 28 Oct 2025 15:38:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761665917; cv=none; b=AaurAHsBbiIhLf+UWaC24GSi4rDAhQgY1T7xeShwIV1lKH0sioqHGSLc1EkmrgiLvK/D0ubQQng/FS5io3B+y9pEMDft9A9e0GZQAjECdWcUVEJlM+jXhhvaOH+ZH9ERNQbzHjaBEJzYbsHIaXD/XQ68yqoqoNNHTDVoGe/8Xm8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761665917; c=relaxed/simple; bh=8aJ7RCMolVhgm0esdxXTYhaHsDH2PgxB0ZdrzK0aDH0=; h=Date:Mime-Version:Message-ID:Subject:From:To:Content-Type; b=kH7p2pVLXnHObjdy+nDnLGlSE5FM7hG/8Wd3fM0pnArtDgqtR2fowXD1h0ZtagpJdYcacporZujp5t8D/CBDZJMIbDOhrXcQ6zJwJ7v6oPTUXAIYdqRo1ske38n37ehpXwxRc+fCjTO8Grf7fXph7qo3FOfElJdAWHl1xnjk7nQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=ayq5EY2V; arc=none smtp.client-ip=209.85.214.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ayq5EY2V" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-2930e2e8e7fso50319095ad.2 for ; Tue, 28 Oct 2025 08:38:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1761665915; x=1762270715; darn=vger.kernel.org; h=to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=j3RgjPX6qcL4gH8q8/DJ2NiBHunt2U+fGlLP8/lcz+4=; b=ayq5EY2VyIcKGdjsqQOlv1lgCQBcbbJ0xeagX/FPkEQk982EvVedHOKl1ipimh9EMv 86E1qh2F7lbO82xcM4k464T6+QXiuk+GjPdJmbXHPcxVpPsEiJgOuGLJitE0nrlu5GTa 5CZA1HkSfhN30QtBKb7ilxrFEEv+VNJkhR8YonTuBBG/B8ithcc94SI3YRnQkZ2fLJMY 7AuUAhO8yV/t3odJ8fV7sz6+wkU5u0XuziKJeQSW3bjv50a2ez1W9uRktA3P8BztWqHH 14zDY1CV5EY0uirEJRXq3awfjlNJ+A57YTgDecxvsav9ifkEvE/tFzVVXXsp2rN6tOma SkGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1761665915; x=1762270715; h=to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=j3RgjPX6qcL4gH8q8/DJ2NiBHunt2U+fGlLP8/lcz+4=; b=lfOHT/hd3dyabQUfL6uwYMPQ8LObEZLspyU2VrdnSoB91EJt+gSu/aTdXSpevDMBWv q2JEiMRegqU2Zp4r+yxqpL2D74VpZmJAae/blfzSqU4SuyUpWCyIYuOTQnZm+8s1+IwW 3nsCr5zfB6rkyFj1KZBkMF67pA2xBaNk1oCQ1LUlRVfelASHah0SUvqQ6VfVEugNQsFD pJZcK23AknkFml7eu/ucC47UCPloSSagH9VcEwlNliFbB2Y77mF8BZHjUy6ih06zp4Ss vurmagwNygrIF2GozotzpdfBr+gAdijHotUK3VjwaL5TvV4JQLUPM1Y4qT/MB+jR563t LMug== X-Forwarded-Encrypted: i=1; AJvYcCX6HMiAueiFRJ8aAXzRPSBKF3Eyl+0QsSz6mtex/qygvbj8iAWknbBPgSdp1KpnXn1OPIFpq0ntddYqYz0=@vger.kernel.org X-Gm-Message-State: AOJu0Ywm3QGcHP+W6bKXq5Xc2rQs1ynU6i6pP5TWas3hkol0eF9epfn5 5lfmLA2mo1kjvuE44bLf7S0AiYxclKC5C8NX4VIklmhQOkzwRnVorS2ff4/seg3u3PI69dKjCJG euS4ScHL+XQ== X-Google-Smtp-Source: AGHT+IH6vp7LNz1krWqBJUvMVVa+KG04FBPh9OwGZAOJAtiIT6D1L6yZGR5noKXy9oz35N/XrcI/30PCe8BF X-Received: from plsu9.prod.google.com ([2002:a17:902:bf49:b0:290:d4c5:90ad]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:1c2:b0:28e:7841:d437 with SMTP id d9443c01a7336-294cb51090amr43843535ad.38.1761665915319; Tue, 28 Oct 2025 08:38:35 -0700 (PDT) Date: Tue, 28 Oct 2025 08:38:20 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.51.1.851.g4ebd6896fd-goog Message-ID: <20251028153821.4003666-1-irogers@google.com> Subject: [PATCH v2] perf test workload: Add thread count argument to thloop From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Allow the number of threads for the thloop workload to be increased beyond the normal 2. Add error checking to the parsed time and thread count values. Signed-off-by: Ian Rogers Acked-by: Arnaldo Carvalho de Melo --- v2: Perform the pthread_join unconditionally and ensure started threads terminate. --- tools/perf/tests/workloads/thloop.c | 45 ++++++++++++++++++++++++----- 1 file changed, 38 insertions(+), 7 deletions(-) diff --git a/tools/perf/tests/workloads/thloop.c b/tools/perf/tests/workloa= ds/thloop.c index 457b29f91c3e..bd8168f883fb 100644 --- a/tools/perf/tests/workloads/thloop.c +++ b/tools/perf/tests/workloads/thloop.c @@ -31,21 +31,52 @@ static void *thfunc(void *arg) =20 static int thloop(int argc, const char **argv) { - int sec =3D 1; - pthread_t th; + int nt =3D 2, sec =3D 1, err =3D 1; + pthread_t *thread_list =3D NULL; =20 if (argc > 0) sec =3D atoi(argv[0]); =20 + if (sec <=3D 0) { + fprintf(stderr, "Error: seconds (%d) must be >=3D 1\n", sec); + return 1; + } + + if (argc > 1) + nt =3D atoi(argv[1]); + + if (nt <=3D 0) { + fprintf(stderr, "Error: thread count (%d) must be >=3D 1\n", nt); + return 1; + } + signal(SIGINT, sighandler); signal(SIGALRM, sighandler); - alarm(sec); =20 - pthread_create(&th, NULL, thfunc, test_loop); - test_loop(); - pthread_join(th, NULL); + thread_list =3D calloc(nt, sizeof(pthread_t)); + if (thread_list =3D=3D NULL) { + fprintf(stderr, "Error: malloc failed for %d threads\n", nt); + goto out; + } + for (int i =3D 1; i < nt; i++) { + int ret =3D pthread_create(&thread_list[i], NULL, thfunc, test_loop); =20 - return 0; + if (ret) { + fprintf(stderr, "Error: failed to create thread %d\n", i); + done =3D 1; // Ensure started threads terminate. + goto out; + } + } + alarm(sec); + test_loop(); + err =3D 0; +out: + for (int i =3D 1; i < nt; i++) { + if (thread_list && thread_list[i]) + pthread_join(thread_list[i], /*retval=3D*/NULL); + } + free(thread_list); + return err; } =20 DEFINE_WORKLOAD(thloop); --=20 2.51.1.851.g4ebd6896fd-goog