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931be446c6
In our production environment, after removing monitor groups, those unused RMIDs get stuck in the limbo list forever because their llc_occupancy is always larger than the threshold. But the unused RMIDs can be successfully freed by turning up the threshold. In order to know how much the threshold should be, perf can be used to acquire the llc_occupancy of RMIDs in each rdt domain. Instead of using perf tool to track llc_occupancy and filter the log manually, it is more convenient for users to use tracepoint to do this work. So add a new tracepoint that shows the llc_occupancy of busy RMIDs when scanning the limbo list. Suggested-by: Reinette Chatre <reinette.chatre@intel.com> Suggested-by: James Morse <james.morse@arm.com> Signed-off-by: Haifeng Xu <haifeng.xu@shopee.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: James Morse <james.morse@arm.com> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Link: https://lore.kernel.org/r/20240408092303.26413-3-haifeng.xu@shopee.com
59 lines
2 KiB
C
59 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM resctrl
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#if !defined(_TRACE_RESCTRL_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_RESCTRL_H
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#include <linux/tracepoint.h>
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TRACE_EVENT(pseudo_lock_mem_latency,
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TP_PROTO(u32 latency),
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TP_ARGS(latency),
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TP_STRUCT__entry(__field(u32, latency)),
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TP_fast_assign(__entry->latency = latency),
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TP_printk("latency=%u", __entry->latency)
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);
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TRACE_EVENT(pseudo_lock_l2,
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TP_PROTO(u64 l2_hits, u64 l2_miss),
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TP_ARGS(l2_hits, l2_miss),
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TP_STRUCT__entry(__field(u64, l2_hits)
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__field(u64, l2_miss)),
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TP_fast_assign(__entry->l2_hits = l2_hits;
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__entry->l2_miss = l2_miss;),
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TP_printk("hits=%llu miss=%llu",
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__entry->l2_hits, __entry->l2_miss));
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TRACE_EVENT(pseudo_lock_l3,
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TP_PROTO(u64 l3_hits, u64 l3_miss),
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TP_ARGS(l3_hits, l3_miss),
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TP_STRUCT__entry(__field(u64, l3_hits)
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__field(u64, l3_miss)),
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TP_fast_assign(__entry->l3_hits = l3_hits;
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__entry->l3_miss = l3_miss;),
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TP_printk("hits=%llu miss=%llu",
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__entry->l3_hits, __entry->l3_miss));
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TRACE_EVENT(mon_llc_occupancy_limbo,
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TP_PROTO(u32 ctrl_hw_id, u32 mon_hw_id, int domain_id, u64 llc_occupancy_bytes),
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TP_ARGS(ctrl_hw_id, mon_hw_id, domain_id, llc_occupancy_bytes),
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TP_STRUCT__entry(__field(u32, ctrl_hw_id)
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__field(u32, mon_hw_id)
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__field(int, domain_id)
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__field(u64, llc_occupancy_bytes)),
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TP_fast_assign(__entry->ctrl_hw_id = ctrl_hw_id;
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__entry->mon_hw_id = mon_hw_id;
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__entry->domain_id = domain_id;
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__entry->llc_occupancy_bytes = llc_occupancy_bytes;),
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TP_printk("ctrl_hw_id=%u mon_hw_id=%u domain_id=%d llc_occupancy_bytes=%llu",
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__entry->ctrl_hw_id, __entry->mon_hw_id, __entry->domain_id,
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__entry->llc_occupancy_bytes)
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);
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#endif /* _TRACE_RESCTRL_H */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#define TRACE_INCLUDE_FILE trace
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#include <trace/define_trace.h>
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