mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6c3b7af1c9
When debugging Kyber, it's really useful to know what latencies we've been having, how the domain depths have been adjusted, and if we've actually been throttling. Add three tracepoints, kyber_latency, kyber_adjust, and kyber_throttled, to record that. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM kyber
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#if !defined(_TRACE_KYBER_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_KYBER_H
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#include <linux/blkdev.h>
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#include <linux/tracepoint.h>
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#define DOMAIN_LEN 16
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#define LATENCY_TYPE_LEN 8
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TRACE_EVENT(kyber_latency,
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TP_PROTO(struct request_queue *q, const char *domain, const char *type,
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unsigned int percentile, unsigned int numerator,
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unsigned int denominator, unsigned int samples),
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TP_ARGS(q, domain, type, percentile, numerator, denominator, samples),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__array( char, domain, DOMAIN_LEN )
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__array( char, type, LATENCY_TYPE_LEN )
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__field( u8, percentile )
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__field( u8, numerator )
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__field( u8, denominator )
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__field( unsigned int, samples )
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),
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TP_fast_assign(
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__entry->dev = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent)));
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strlcpy(__entry->domain, domain, DOMAIN_LEN);
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strlcpy(__entry->type, type, DOMAIN_LEN);
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__entry->percentile = percentile;
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__entry->numerator = numerator;
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__entry->denominator = denominator;
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__entry->samples = samples;
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),
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TP_printk("%d,%d %s %s p%u %u/%u samples=%u",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->domain,
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__entry->type, __entry->percentile, __entry->numerator,
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__entry->denominator, __entry->samples)
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);
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TRACE_EVENT(kyber_adjust,
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TP_PROTO(struct request_queue *q, const char *domain,
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unsigned int depth),
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TP_ARGS(q, domain, depth),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__array( char, domain, DOMAIN_LEN )
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__field( unsigned int, depth )
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),
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TP_fast_assign(
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__entry->dev = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent)));
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strlcpy(__entry->domain, domain, DOMAIN_LEN);
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__entry->depth = depth;
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),
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TP_printk("%d,%d %s %u",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->domain,
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__entry->depth)
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);
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TRACE_EVENT(kyber_throttled,
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TP_PROTO(struct request_queue *q, const char *domain),
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TP_ARGS(q, domain),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__array( char, domain, DOMAIN_LEN )
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),
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TP_fast_assign(
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__entry->dev = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent)));
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strlcpy(__entry->domain, domain, DOMAIN_LEN);
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),
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TP_printk("%d,%d %s", MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->domain)
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);
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#define _TRACE_KYBER_H
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#endif /* _TRACE_KYBER_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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