1 #RUN: llvm-xray account %s -o - -m %S/Inputs/simple-instrmap.yaml -d | FileCheck %s 2 --- 3 header: 4 version: 1 5 type: 0 6 constant-tsc: true 7 nonstop-tsc: true 8 cycle-frequency: 0 9 records: 10 # Here we reconstruct the following call trace: 11 # 12 # f1() 13 # f2() 14 # f3() 15 # 16 # But we find that we're missing an exit record for f2() because it's 17 # tail-called f3(). We make sure that if we see a trace like this that we can 18 # deduce tail calls, and account the time (potentially wrongly) to f2() when 19 # f1() exits. That is because we don't go back to f3()'s entry record to 20 # properly do the math on the timing of f2(). 21 # 22 # Note that by default, tail/sibling call deduction is disabled, and is enabled 23 # with a flag "-d" or "-deduce-sibling-calls". 24 # 25 - { type: 0, func-id: 1, cpu: 1, thread: 111, kind: function-enter, tsc: 10000 } 26 - { type: 0, func-id: 2, cpu: 1, thread: 111, kind: function-enter, tsc: 10001 } 27 - { type: 0, func-id: 3, cpu: 1, thread: 111, kind: function-enter, tsc: 10002 } 28 - { type: 0, func-id: 3, cpu: 1, thread: 111, kind: function-exit, tsc: 10003 } 29 - { type: 0, func-id: 1, cpu: 1, thread: 111, kind: function-exit, tsc: 10004 } 30 ... 31 32 #CHECK: Functions with latencies: 3 33 #CHECK-NEXT: funcid count [ min, med, 90p, 99p, max] sum function 34 #CHECK-NEXT: 1 1 [ 4.{{.*}}, 4.{{.*}}, 4.{{.*}}, 4.{{.*}}, 4.{{.*}}] {{.*}} {{.*}} 35 #CHECK-NEXT: 2 1 [ 3.{{.*}}, 3.{{.*}}, 3.{{.*}}, 3.{{.*}}, 3.{{.*}}] {{.*}} {{.*}} 36 #CHECK-NEXT: 3 1 [ 1.{{.*}}, 1.{{.*}}, 1.{{.*}}, 1.{{.*}}, 1.{{.*}}] {{.*}} {{.*}} 37
