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llvm-project/llvm/test/tools/llvm-profdata/weight-instr.test

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[llvm-profdata] Add support for weighted merge of profile data (2nd try) Summary: This change adds support for specifying a weight when merging profile data with the llvm-profdata tool. Weights are specified by using the --weighted-input=<weight>,<filename> option. Input files not specified with this option (normal positional list after options) are given a default weight of 1. Adding support for arbitrary weighting of input profile data allows for relative importance to be placed on the input data from multiple training runs. Both sampled and instrumented profiles are supported. Reviewers: davidxl, dnovillo, bogner, silvas Subscribers: silvas, davidxl, llvm-commits Differential Revision: http://reviews.llvm.org/D15306 llvm-svn: 255659
2015-12-16 01:37:09 +08:00
Tests for weighted merge of instrumented profiles.
1- Merge the foo and bar profiles with unity weight and verify the combined output
RUN: llvm-profdata merge -instr -weighted-input=1,%p/Inputs/weight-instr-bar.profdata -weighted-input=1,%p/Inputs/weight-instr-foo.profdata -o %t
RUN: llvm-profdata show -instr -all-functions %t | FileCheck %s -check-prefix=1X_1X_WEIGHT
RUN: llvm-profdata merge -instr -weighted-input=1,%p/Inputs/weight-instr-bar.profdata %p/Inputs/weight-instr-foo.profdata -o %t
RUN: llvm-profdata show -instr -all-functions %t | FileCheck %s -check-prefix=1X_1X_WEIGHT
1X_1X_WEIGHT: Counters:
1X_1X_WEIGHT-NEXT: usage:
1X_1X_WEIGHT-NEXT: Hash: 0x0000000000000000
1X_1X_WEIGHT-NEXT: Counters: 1
1X_1X_WEIGHT-NEXT: Function count: 0
1X_1X_WEIGHT-NEXT: foo:
1X_1X_WEIGHT-NEXT: Hash: 0x000000000000028a
1X_1X_WEIGHT-NEXT: Counters: 3
1X_1X_WEIGHT-NEXT: Function count: 866988873
1X_1X_WEIGHT-NEXT: bar:
1X_1X_WEIGHT-NEXT: Hash: 0x000000000000028a
1X_1X_WEIGHT-NEXT: Counters: 3
1X_1X_WEIGHT-NEXT: Function count: 866988873
1X_1X_WEIGHT-NEXT: main:
1X_1X_WEIGHT-NEXT: Hash: 0x7d31c47ea98f8248
1X_1X_WEIGHT-NEXT: Counters: 60
1X_1X_WEIGHT-NEXT: Function count: 2
1X_1X_WEIGHT-NEXT: Functions shown: 4
1X_1X_WEIGHT-NEXT: Total functions: 4
1X_1X_WEIGHT-NEXT: Maximum function count: 866988873
1X_1X_WEIGHT-NEXT: Maximum internal block count: 267914296
2- Merge the foo and bar profiles with weight 3x and 5x respectively and verify the combined output
RUN: llvm-profdata merge -instr -weighted-input=3,%p/Inputs/weight-instr-bar.profdata -weighted-input=5,%p/Inputs/weight-instr-foo.profdata -o %t
RUN: llvm-profdata show -instr -all-functions %t | FileCheck %s -check-prefix=3X_5X_WEIGHT
3X_5X_WEIGHT: Counters:
3X_5X_WEIGHT-NEXT: usage:
3X_5X_WEIGHT-NEXT: Hash: 0x0000000000000000
3X_5X_WEIGHT-NEXT: Counters: 1
3X_5X_WEIGHT-NEXT: Function count: 0
3X_5X_WEIGHT-NEXT: foo:
3X_5X_WEIGHT-NEXT: Hash: 0x000000000000028a
3X_5X_WEIGHT-NEXT: Counters: 3
3X_5X_WEIGHT-NEXT: Function count: 4334944365
3X_5X_WEIGHT-NEXT: bar:
3X_5X_WEIGHT-NEXT: Hash: 0x000000000000028a
3X_5X_WEIGHT-NEXT: Counters: 3
3X_5X_WEIGHT-NEXT: Function count: 2600966619
3X_5X_WEIGHT-NEXT: main:
3X_5X_WEIGHT-NEXT: Hash: 0x7d31c47ea98f8248
3X_5X_WEIGHT-NEXT: Counters: 60
3X_5X_WEIGHT-NEXT: Function count: 8
3X_5X_WEIGHT-NEXT: Functions shown: 4
3X_5X_WEIGHT-NEXT: Total functions: 4
3X_5X_WEIGHT-NEXT: Maximum function count: 4334944365
3X_5X_WEIGHT-NEXT: Maximum internal block count: 1339571480
3- Bad merge: invalid weight
RUN: not llvm-profdata merge -instr -weighted-input=3,%p/Inputs/weight-instr-bar.profdata -weighted-input=0,%p/Inputs/weight-instr-foo.profdata -o %t.out 2>&1 | FileCheck %s -check-prefix=INVALID_WEIGHT
RUN: not llvm-profdata merge -instr -weighted-input=3,%p/Inputs/weight-instr-bar.profdata -weighted-input=0.75,%p/Inputs/weight-instr-foo.profdata -o %t.out 2>&1 | FileCheck %s -check-prefix=INVALID_WEIGHT
RUN: not llvm-profdata merge -instr -weighted-input=3,%p/Inputs/weight-instr-bar.profdata -weighted-input=-5,%p/Inputs/weight-instr-foo.profdata -o %t.out 2>&1 | FileCheck %s -check-prefix=INVALID_WEIGHT
RUN: not llvm-profdata merge -instr -weighted-input=3,%p/Inputs/weight-instr-bar.profdata -weighted-input=,%p/Inputs/weight-instr-foo.profdata -o %t.out 2>&1 | FileCheck %s -check-prefix=INVALID_WEIGHT
RUN: not llvm-profdata merge -instr -weighted-input=3,%p/Inputs/weight-instr-bar.profdata -weighted-input=%p/Inputs/weight-instr-foo.profdata -o %t.out 2>&1 | FileCheck %s -check-prefix=INVALID_WEIGHT
INVALID_WEIGHT: error: Input weight must be a positive integer.
4- Bad merge: input path does not exist
RUN: not llvm-profdata merge -instr -weighted-input=3,%p/Inputs/does-not-exist.profdata -weighted-input=2,%p/Inputs/does-not-exist-either.profdata -o %t.out 2>&1 | FileCheck %s -check-prefix=INVALID_INPUT
INVALID_INPUT: {{.*}}: {{.*}}does-not-exist.profdata: {{[Nn]}}o such file or directory
5- No inputs
RUN: not llvm-profdata merge -instr -o %t.out 2>&1 | FileCheck %s -check-prefix=NO_INPUT
NO_INPUT: {{.*}}: No input files specified. See llvm-profdata{{(\.EXE|\.exe)?}} merge -help