Lines Matching +full:over +full:- +full:sampling

1 perf-amd-ibs(1)
5 ----
6 perf-amd-ibs - Support for AMD Instruction-Based Sampling (IBS) with perf tool
9 --------
11 'perf record' -e ibs_op//
12 'perf record' -e ibs_fetch//
15 -----------
17 Instruction-Based Sampling (IBS) provides precise Instruction Pointer (IP)
19 Op and IBS Fetch. IBS Op sampling provides information about instruction
20 execution (micro-op execution to be precise) with details like d-cache
21 hit/miss, d-TLB hit/miss, cache miss latency, load/store data source, branch
22 behavior etc. IBS Fetch sampling provides information about instruction fetch
23 with details like i-cache hit/miss, i-TLB hit/miss, fetch latency etc. IBS is
24 per-smt-thread i.e. each SMT hardware thread contains standalone IBS units.
40 ------------------------
54 	-e cpu-cycles:p becomes -e ibs_op//
55 	-e r076:p becomes -e ibs_op//
56 	-e r0C1:p becomes -e ibs_op/cnt_ctl=1/
59 --------
64 System-wide profile, cycles event, sampling period: 100000
66 	# perf record -e ibs_op// -c 100000 -a
68 Per-cpu profile (cpu10), cycles event, sampling period: 100000
70 	# perf record -e ibs_op// -c 100000 -C 10
72 Per-cpu profile (cpu10), cycles event, sampling freq: 1000
74 	# perf record -e ibs_op// -F 1000 -C 10
76 System-wide profile, uOps event, sampling period: 100000
78 	# perf record -e ibs_op/cnt_ctl=1/ -c 100000 -a
82 	# perf record -e ibs_op/cnt_ctl=1/ -c 100000 -a --raw-samples
84 System-wide profile, uOps event, sampling period: 100000, L3MissOnly (Zen4 onward)
86 	# perf record -e ibs_op/cnt_ctl=1,l3missonly=1/ -c 100000 -a
88 Per process(upstream v6.2 onward), uOps event, sampling period: 100000
90 	# perf record -e ibs_op/cnt_ctl=1/ -c 100000 -p 1234
92 Per process(upstream v6.2 onward), uOps event, sampling period: 100000
94 	# perf record -e ibs_op/cnt_ctl=1/ -c 100000 -- ls
101 To go over each sample
105 Raw dump of IBS registers when profiled with --raw-samples
107 	# perf report -D
133 	https://lore.kernel.org/r/20220921063638.2489-1-kprateek.nayak@amd.com
140 System-wide profile, fetch ops event, sampling period: 100000
142 	# perf record -e ibs_fetch// -c 100000 -a
144 System-wide profile, fetch ops event, sampling period: 100000, Random enable
146 	# perf record -e ibs_fetch/rand_en=1/ -c 100000 -a
150 	instruction over and over because of fixed sample period.
155 ---------------------
161 	# perf mem record -c 100000 -- make
167 	# perf mem report -F mem,sample,snoop
186 --------
188 linkperf:perf-record[1], linkperf:perf-script[1], linkperf:perf-report[1],
189 linkperf:perf-mem[1], linkperf:perf-c2c[1]