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Wed, 18 Feb 2026 05:33:36 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 61I5XYLl43713000 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 18 Feb 2026 05:33:34 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6F2FA20040; Wed, 18 Feb 2026 05:33:34 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BD75620043; Wed, 18 Feb 2026 05:33:32 +0000 (GMT) Received: from [9.43.5.239] (unknown [9.43.5.239]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 18 Feb 2026 05:33:32 +0000 (GMT) Message-ID: Date: Wed, 18 Feb 2026 11:03:31 +0530 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PPC][Tracing] Missing syscalls:* ftrace/perf events on PowerPC vs x86 To: "Nassiri, Mohammad" , "linuxppc-dev@lists.ozlabs.org" Cc: "linux-trace-users@vger.kernel.org" , "michael@ellerman.id.au" , "srostedt@redhat.com" , "masami.hiramatsu@linaro.org" , Christophe Leroy , Nicholas Piggin References: Content-Language: en-US From: Hari Bathini In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: ZcZRDNRchZ9o3YcEDqQjNzz-hhxhkouE X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE4MDA0MyBTYWx0ZWRfX0O+nc+sVVCxe ml3mGq+pnBGxncjT8njk7nXP+aIx32hHPl75NYQbBLb9cAgO6WA5MC7IQ7acwKWGjSWK5NVlvU5 ugvgupY3e9Rk/JLvGLNN9tD3Z+v7sTKEs1jZhm4QUn+eCdzflfs4g8VRqxQLoyQe1N6bQUIvfdW AWb55bqT0F2eB0JnAm+efmXGVGWeT0q5xd1S2OcO6txLw/Otkm4vqLrpQDzmwCBeq+AIA8gh/UY FUy8elwKr9XLGXcofX0hVF/OuS/QidSk2+R8Ifnm6jOIb9kwtJmXMoigYL5fzhlbHumvABBxYIP tHn0uc/JM7+fMlP70i4Z/gRF+elGMMRvv4AtFjwzijNzqrox6z2Y9r48aTGNYp23z6ovQK0vKTT 202ed2MQfAybaXYqyPdVASBE+hVyOCt3p8JDZ8HytaEXyZxA9J4wlaqD7SY1nMiUThwoyVqeRTJ MMWAmEspBdhrOCzPFrQ== X-Proofpoint-GUID: Kpmx5zUcTg_pbto6RNvR4YoiCD8Xu3uC X-Authority-Analysis: v=2.4 cv=U+mfzOru c=1 sm=1 tr=0 ts=69954f31 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=VwQbUJbxAAAA:8 a=5AoxzEp_LWBq4ObcYV0A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-17_04,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 bulkscore=0 impostorscore=0 malwarescore=0 spamscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602180043 On 18/02/26 1:40 am, Nassiri, Mohammad wrote: > Hello, > > On PPC64 with Yocto Kirkstone and Linux 5.10.x, `CONFIG_FTRACE_SYSCALLS=y` is enabled, but neither `perf list` nor ftrace show per‑syscall events under `/sys/kernel/debug/tracing/events/syscalls`. Only `raw_syscalls:sys_enter` / `raw_syscalls:sys_exit` are available. > > On the same build and kernel version for x86_64, per‑syscall events are visible. > > Configs on PPC include: > CONFIG_TRACEPOINTS=y > CONFIG_EVENT_TRACING=y > CONFIG_FTRACE=y > CONFIG_FTRACE_SYSCALLS=y > CONFIG_HAVE_SYSCALL_TRACEPOINTS=y > > Questions: > 1. Is the absence of per‑syscall tracepoints on PPC in 5.10.x expected behaviour, or am I missing a config option required for these syscalls:* events to be available? > 2. Or were these events only enabled for PPC after Michael Ellerman’s syscall tracing patch series in v6.1? > Link: https://lore.kernel.org/linuxppc-dev/166488988686.779920.13794870102696416283.b4-ty@ellerman.id.au/ > 3. If yes to (2), would a minimal backport of the PPC syscall tracepoint generation code from v6.1 allow 5.10.x to show syscalls:* events in perf/ftrace? You should see syscall enter/exit tracepoints on v5.10.x without syscall wrapper patchset referred above. Are you using v5.10.250 ? Also, would help, if you can share the .config you used. - Hari