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Thu, 24 Apr 2025 00:01:56 +0000 Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 53O01oOo004345; Thu, 24 Apr 2025 00:01:55 GMT Received: from clb-2-bm-ad2.osdevelopmeniad.oraclevcn.com (clb-2-bm-ad2.allregionaliads.osdevelopmeniad.oraclevcn.com [100.100.254.172]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 466k06jqsh-3; Thu, 24 Apr 2025 00:01:55 +0000 From: Libo Chen To: akpm@linux-foundation.org, rostedt@goodmis.org, peterz@infradead.org, mgorman@suse.de, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, tj@kernel.org, llong@redhat.com Cc: sraithal@amd.com, venkat88@linux.ibm.com, kprateek.nayak@amd.com, raghavendra.kt@amd.com, yu.c.chen@intel.com, tim.c.chen@intel.com, vineethr@linux.ibm.com, chris.hyser@oracle.com, daniel.m.jordan@oracle.com, lorenzo.stoakes@oracle.com, mkoutny@suse.com, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 2/2] sched/numa: Add tracepoint that tracks the skipping of numa balancing due to cpuset memory pinning Date: Wed, 23 Apr 2025 17:01:46 -0700 Message-ID: <20250424000146.1197285-3-libo.chen@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20250424000146.1197285-1-libo.chen@oracle.com> References: <20250424000146.1197285-1-libo.chen@oracle.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.680,FMLib:17.12.80.40 definitions=2025-04-23_12,2025-04-22_01,2025-02-21_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 bulkscore=0 mlxscore=0 spamscore=0 malwarescore=0 mlxlogscore=999 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2504070000 definitions=main-2504230161 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNDIzMDE2MSBTYWx0ZWRfX3K39cFddEaSw J5oyY6Kvwthg3Sm5joJzJ9MVxLsPp7WXSPS8c0gUbzNAvwxLKmgAbb5AwaOnv2nV1H7+GXkJ6ZA knU22nKaGz2Dj5tfv6Dit5jNKkVPFe4/WNpWz05B5/R5gjaSrXZE5tRDElt2bhdY5X6K/8/BBxo tCpOeKX7x5fWKHVwW5od+FUNyGwUsnv8MVdoeVolX+aPIyH4Bk+yTgRWFeDbEA8rnFLrqt8AyNi xaFDSYaAwy95yipbI1Xdm/F1kSmtPfTv5PW4zJo9rpbpJUEvezR8iCZH5jpN0sZ3wsebHJXq7FG F5FFJgVksVxKWJShryZd3kaduB3MMW2UkZ6CyxwAlWUVpGzlsheklbPoPuzGDO3Udb7z0cNHo5Y nlhIDoql X-Proofpoint-ORIG-GUID: opZWXMmBppisdzyOststAw_YWX0HnQeg X-Proofpoint-GUID: opZWXMmBppisdzyOststAw_YWX0HnQeg X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: D0B7640014 X-Stat-Signature: 1he85wpggt7wx7oybguscsqqrdphrfna X-Rspam-User: X-HE-Tag: 1745452930-764719 X-HE-Meta: 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 TDd5sWx/ 9mZRWUgxOToY5UR+eSGfosu42NdR20KLolR1wi6XViq6Cf53PvH3VDtHjFTxBPpUIVMtKn8H7RUBi/66B9FUT7nWZdqwFRmgzqGLb0dXs8ecM58GoT2SuhJRi74I+nhHeK2WKAWbGwA7XJLV5T1FM/S/Y/Aqg1zgduO+SbEN98HsrEb9EoJl220gQogqH44DZueQJudgX3CFBzi9YpshukupxTxioXxgpXzidGpa9mkGnGNY= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Unlike sched_skip_vma_numa tracepoint which tracks skipped VMAs, this tracks the task subjected to cpuset.mems pinning and prints out its allowed memory node mask. Signed-off-by: Libo Chen --- include/trace/events/sched.h | 31 +++++++++++++++++++++++++++++++ kernel/sched/fair.c | 4 +++- 2 files changed, 34 insertions(+), 1 deletion(-) diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 8994e97d86c1..91f9dc177dad 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -745,6 +745,37 @@ TRACE_EVENT(sched_skip_vma_numa, __entry->vm_end, __print_symbolic(__entry->reason, NUMAB_SKIP_REASON)) ); + +TRACE_EVENT(sched_skip_cpuset_numa, + + TP_PROTO(struct task_struct *tsk, nodemask_t *mem_allowed_ptr), + + TP_ARGS(tsk, mem_allowed_ptr), + + TP_STRUCT__entry( + __array( char, comm, TASK_COMM_LEN ) + __field( pid_t, pid ) + __field( pid_t, tgid ) + __field( pid_t, ngid ) + __array( unsigned long, mem_allowed, BITS_TO_LONGS(MAX_NUMNODES)) + ), + + TP_fast_assign( + memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN); + __entry->pid = task_pid_nr(tsk); + __entry->tgid = task_tgid_nr(tsk); + __entry->ngid = task_numa_group_id(tsk); + memcpy(__entry->mem_allowed, mem_allowed_ptr->bits, + sizeof(__entry->mem_allowed)); + ), + + TP_printk("comm=%s pid=%d tgid=%d ngid=%d mem_nodes_allowed=%*pbl", + __entry->comm, + __entry->pid, + __entry->tgid, + __entry->ngid, + MAX_NUMNODES, __entry->mem_allowed) +); #endif /* CONFIG_NUMA_BALANCING */ /* diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index c9903b1b3948..cc892961ce15 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3333,8 +3333,10 @@ static void task_numa_work(struct callback_head *work) * Memory is pinned to only one NUMA node via cpuset.mems, naturally * no page can be migrated. */ - if (cpusets_enabled() && nodes_weight(cpuset_current_mems_allowed) == 1) + if (cpusets_enabled() && nodes_weight(cpuset_current_mems_allowed) == 1) { + trace_sched_skip_cpuset_numa(current, &cpuset_current_mems_allowed); return; + } if (!mm->numa_next_scan) { mm->numa_next_scan = now + -- 2.43.5