From patchwork Tue Oct 22 12:21:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pintu Kumar X-Patchwork-Id: 837678 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 73CB7146D78; Tue, 22 Oct 2024 12:22:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729599771; cv=none; b=RsqqbvABqEvx9JO4xH/MnR+lwhkFgbYm2dTWcXcNQAwcXFD1apn1/2HIiQri9CSadbYIpLelbYRFt1Sq3XgSXk4RHinAKH8GKSsTcq7iU/MDwmnUrMrv7bnMaZNn3fmeL0GHUmqDsLTciRQjOw5cxN5hS82pNOfVsH3MXcTaHyI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729599771; c=relaxed/simple; bh=rJbleJQxI6miYx1TXF/6W93DeB7LRmc2OcUVp6DzVyM=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=VfvvWIB54zAqL9zFJxvmqFXxa21JE6/lterJxqu5IuZKxRIj4bVam9NC0ggLRT6wFTmW8lZImXHAjCBWMuzqlPLRIDNKK/SrFNvnbl+gbRlMYvrxKoWInEabrHctGI6tRzk4m+3yo9Ty6R63fF7sczWBjSlBt40Ozu+4z5qaI2g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=jy8Wb+a6; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="jy8Wb+a6" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49MC9x8C025868; Tue, 22 Oct 2024 12:22:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-type:date:from:message-id:mime-version:subject:to; s= qcppdkim1; bh=cOI8qm3Kv36No/LbxhZZ0t2OrkaIE9xcy4eQD81YBUQ=; b=jy 8Wb+a6Gv+nb3nG7w47zjBSdX1qBczDALPd47Us+sIV2eCmOZdesgz0yRG817+wqZ Pdmc2fZCk3jIl1HeCvGXr/yldWT6ln7r/dA990Rvo25qIsXmWktQOZNt01tInr3E fD6DNAb10ZegQxADcwZfHfO2QTWePsTxsMD90mmaa/aHShFD3etwV0JHBpQ6xoqn kQlAuFXXtjnAqAesFigm4qfR9l3r/hqKLTlwLB7iX1rAW2KBzG69cN33A36hlmSv YNvMm5/YklgasZn2Jak90aGKgCAtGbht1W9ux7TVMBARTUBbuXTKiyv7g5je1Pub ILkqLTVEVMRIvcGyn/Yg== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 42ebtm8124-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 22 Oct 2024 12:22:36 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA02.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 49MCMZSd015860 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 22 Oct 2024 12:22:35 GMT Received: from hu-pintu-blr.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Tue, 22 Oct 2024 05:22:32 -0700 From: Pintu Kumar To: , , , , , , CC: , Subject: [PATCH] selftests/sched: add basic test for psi Date: Tue, 22 Oct 2024 17:51:58 +0530 Message-ID: <20241022122158.2136-1-quic_pintu@quicinc.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: L9znsB6kpUeXQlLomLTQu1eW2ZQPOqLw X-Proofpoint-GUID: L9znsB6kpUeXQlLomLTQu1eW2ZQPOqLw X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1011 malwarescore=0 suspectscore=0 mlxscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 mlxlogscore=969 adultscore=0 lowpriorityscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410220079 There is a psi module that exists under kernel/sched/psi. Add a basic test to test the psi. This test just add the basic support to check cpu/memory/io interface. Further test will be added on top of this. Signed-off-by: Pintu Kumar --- MAINTAINERS | 2 + tools/testing/selftests/sched/.gitignore | 1 + tools/testing/selftests/sched/Makefile | 4 +- tools/testing/selftests/sched/config | 1 + tools/testing/selftests/sched/psi_test.c | 85 ++++++++++++++++++++++++ tools/testing/selftests/sched/run_psi.sh | 36 ++++++++++ 6 files changed, 127 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/sched/psi_test.c create mode 100755 tools/testing/selftests/sched/run_psi.sh diff --git a/MAINTAINERS b/MAINTAINERS index 84a73e90cfe8..d84ff9ca36a9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18548,10 +18548,12 @@ F: include/uapi/linux/pps.h PRESSURE STALL INFORMATION (PSI) M: Johannes Weiner M: Suren Baghdasaryan +M: Pintu Kumar R: Peter Ziljstra S: Maintained F: include/linux/psi* F: kernel/sched/psi.c +F: tools/testing/selftests/sched/psi_test.c PRINTK M: Petr Mladek diff --git a/tools/testing/selftests/sched/.gitignore b/tools/testing/selftests/sched/.gitignore index 6996d4654d92..2b15c11b93e6 100644 --- a/tools/testing/selftests/sched/.gitignore +++ b/tools/testing/selftests/sched/.gitignore @@ -1 +1,2 @@ cs_prctl_test +psi_test diff --git a/tools/testing/selftests/sched/Makefile b/tools/testing/selftests/sched/Makefile index 099ee9213557..795f6613eb2c 100644 --- a/tools/testing/selftests/sched/Makefile +++ b/tools/testing/selftests/sched/Makefile @@ -8,7 +8,7 @@ CFLAGS += -O2 -Wall -g -I./ $(KHDR_INCLUDES) -Wl,-rpath=./ \ $(CLANG_FLAGS) LDLIBS += -lpthread -TEST_GEN_FILES := cs_prctl_test -TEST_PROGS := cs_prctl_test +TEST_GEN_FILES := cs_prctl_test psi_test +TEST_PROGS := cs_prctl_test run_psi.sh include ../lib.mk diff --git a/tools/testing/selftests/sched/config b/tools/testing/selftests/sched/config index e8b09aa7c0c4..287cccd434fd 100644 --- a/tools/testing/selftests/sched/config +++ b/tools/testing/selftests/sched/config @@ -1 +1,2 @@ CONFIG_SCHED_DEBUG=y +CONFIG_PSI=y diff --git a/tools/testing/selftests/sched/psi_test.c b/tools/testing/selftests/sched/psi_test.c new file mode 100644 index 000000000000..eeba138d2b39 --- /dev/null +++ b/tools/testing/selftests/sched/psi_test.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include + + +struct load_avg { + float avg10; + float avg60; + float avg300; + unsigned long long total; +}; + +struct pressure { + struct load_avg some; + struct load_avg full; +}; + + +int psi_get_data_from_proc_pressure(const char *path, struct pressure *p) +{ + FILE *fp; + int rc = -1; + int ret = 0; + + if (path == NULL || p == NULL) + return -1; + + fp = fopen(path, "r"); + if (fp == NULL) + return -1; + + while (!feof(fp)) { + rc = fscanf(fp, "some avg10=%f avg60=%f avg300=%f total=%llu\n", + &p->some.avg10, &p->some.avg60, &p->some.avg300, &p->some.total); + if (rc < 1) { + ret = -1; + break; + } + + /* Note: In some cases (cpu) full may not exists */ + rc = fscanf(fp, "full avg10=%f avg60=%f avg300=%f total=%llu\n", + &p->full.avg10, &p->full.avg60, &p->full.avg300, &p->full.total); + /* We don't care about full case. This is needed to avoid warnings */ + rc = 0; + } + + fclose(fp); + + return ret; +} + +int main(int argc, char *argv[]) +{ + int ret; + struct pressure rs = {0,}; + char path[32]; + + if (argc < 2) { + fprintf(stderr, "usage: %s \n", argv[0]); + return -1; + } + + memset(&rs, 0, sizeof(rs)); + printf("Pressure data: %s\n", argv[1]); + snprintf(path, sizeof(path)-1, "/proc/pressure/%s", argv[1]); + + ret = psi_get_data_from_proc_pressure(path, &rs); + if (ret < 0) { + printf("PSI <%s>: FAIL\n", argv[1]); + return -1; + } + printf("Some Avg10 = %5.2f\n", rs.some.avg10); + printf("Some Avg60 = %5.2f\n", rs.some.avg60); + printf("Some Avg300 = %5.2f\n", rs.some.avg300); + printf("Some Total = %llu\n", rs.some.total); + printf("Full Avg10 = %5.2f\n", rs.full.avg10); + printf("Full Avg60 = %5.2f\n", rs.full.avg60); + printf("Full Avg300 = %5.2f\n", rs.full.avg300); + printf("Full Total = %llu\n", rs.full.total); + + + return 0; +} diff --git a/tools/testing/selftests/sched/run_psi.sh b/tools/testing/selftests/sched/run_psi.sh new file mode 100755 index 000000000000..d0b1c7ae3736 --- /dev/null +++ b/tools/testing/selftests/sched/run_psi.sh @@ -0,0 +1,36 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +# Just one node check is enough to detect psi +if [ ! -e /proc/pressure/cpu ]; then + echo "PSI not present..." + exit $ksft_skip +fi + +echo "" +./psi_test cpu +if [ $? -ne 0 ]; then + echo "CPU - [FAIL]" +else + echo "CPU - [PASS]" +fi + +echo "" +./psi_test memory +if [ $? -ne 0 ]; then + echo "MEMORY - [FAIL]" +else + echo "MEMORY - [PASS]" +fi + +echo "" +./psi_test io +if [ $? -ne 0 ]; then + echo "IO - [FAIL]" +else + echo "IO - [PASS]" +fi