diff options
Diffstat (limited to 'test/tools/llvm-xray/X86/account-deduce-tail-call.yaml')
| -rw-r--r-- | test/tools/llvm-xray/X86/account-deduce-tail-call.yaml | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/test/tools/llvm-xray/X86/account-deduce-tail-call.yaml b/test/tools/llvm-xray/X86/account-deduce-tail-call.yaml new file mode 100644 index 0000000000000..6e926974141f3 --- /dev/null +++ b/test/tools/llvm-xray/X86/account-deduce-tail-call.yaml @@ -0,0 +1,36 @@ +#RUN: llvm-xray account %s -o - -m %S/Inputs/simple-instrmap.yaml -t yaml -d | FileCheck %s +--- +header: + version: 1 + type: 0 + constant-tsc: true + nonstop-tsc: true + cycle-frequency: 0 +records: +# Here we reconstruct the following call trace: +# +# f1() +# f2() +# f3() +# +# But we find that we're missing an exit record for f2() because it's +# tail-called f3(). We make sure that if we see a trace like this that we can +# deduce tail calls, and account the time (potentially wrongly) to f2() when +# f1() exits. That is because we don't go back to f3()'s entry record to +# properly do the math on the timing of f2(). +# +# Note that by default, tail/sibling call deduction is disabled, and is enabled +# with a flag "-d" or "-deduce-sibling-calls". +# + - { type: 0, func-id: 1, cpu: 1, thread: 111, kind: function-enter, tsc: 10000 } + - { type: 0, func-id: 2, cpu: 1, thread: 111, kind: function-enter, tsc: 10001 } + - { type: 0, func-id: 3, cpu: 1, thread: 111, kind: function-enter, tsc: 10002 } + - { type: 0, func-id: 3, cpu: 1, thread: 111, kind: function-exit, tsc: 10003 } + - { type: 0, func-id: 1, cpu: 1, thread: 111, kind: function-exit, tsc: 10004 } +... + +#CHECK: Functions with latencies: 3 +#CHECK-NEXT: funcid count [ min, med, 90p, 99p, max] sum function +#CHECK-NEXT: 1 1 [ 4.{{.*}}, 4.{{.*}}, 4.{{.*}}, 4.{{.*}}, 4.{{.*}}] {{.*}} {{.*}} +#CHECK-NEXT: 2 1 [ 3.{{.*}}, 3.{{.*}}, 3.{{.*}}, 3.{{.*}}, 3.{{.*}}] {{.*}} {{.*}} +#CHECK-NEXT: 3 1 [ 1.{{.*}}, 1.{{.*}}, 1.{{.*}}, 1.{{.*}}, 1.{{.*}}] {{.*}} {{.*}} |