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14 Commits

Author SHA1 Message Date
Clement Courbet 41c8af3924 [MCSched] Bind PFM Counters to the CPUs instead of the SchedModel. 
Summary:
The pfm counters are now in the ExegesisTarget rather than the
MCSchedModel (PR39165).

This also compresses the pfm counter tables (PR37068).

Reviewers: RKSimon, gchatelet

Subscribers: mgrang, llvm-commits

Differential Revision: https://reviews.llvm.org/D52932

llvm-svn: 345243
 2018-10-25 07:44:01 +00:00
Clement Courbet f973c2df9d [llvm-exegesis] Allow measuring several instructions in a single run. 
Summary:
We try to recover gracefully on instructions that would crash the
program.

This includes some refactoring of runMeasurement() implementations.

Reviewers: gchatelet

Subscribers: tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D53371

llvm-svn: 344695
 2018-10-17 15:04:15 +00:00
Simon Pilgrim c4976f6b9f The llvm-exegesis output file is a html file not a txt file. 
llvm-svn: 343215
 2018-09-27 13:49:52 +00:00
Clement Courbet 86ecf46fb4 [llvm-exegesis] Fix doc in r342947. 
llvm-exegesis.rst was using invalid indentation for bullet points.

llvm-svn: 342948
 2018-09-25 07:48:38 +00:00
Clement Courbet 78b2e73d15 [llvm-exegesis] Allow benchmarking arbitrary code snippets. 
Summary:

This is a step towards fixing PR38048.

Note that right now the measurements are given per instruction. We'll
need to give measurements a per code snippet and update the analysis (PR38731).

Reviewers: gchatelet

Subscribers: tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D52041

llvm-svn: 342947
 2018-09-25 07:31:44 +00:00
Simon Pilgrim a5638431dc [docs] Fix indentation of llvm-exegesis command line arguments 
llvm-svn: 334976
 2018-06-18 20:05:02 +00:00
Clement Courbet e752fd65e8 [llvm-exegesis] Optionally ignore instructions without a sched class. 
Summary: See PR37602.

Reviewers: RKSimon

Subscribers: llvm-commits, tschuett

Differential Revision: https://reviews.llvm.org/D48267

llvm-svn: 334932
 2018-06-18 11:27:47 +00:00
Clement Courbet 6eb680a40d [llvm-exegesis] Fix off-by-one in llvm-exegesis documentation. 
llvm-svn: 333759
 2018-06-01 14:49:06 +00:00
Clement Courbet 2637e5f828 [llvm-exegesis] Show sched class details in analysis. 
Summary: And update docs.

Reviewers: gchatelet

Subscribers: tschuett, craig.topper, RKSimon, llvm-commits

Differential Revision: https://reviews.llvm.org/D47254

llvm-svn: 333169
 2018-05-24 10:47:05 +00:00
Clement Courbet 488ebfb732 [llvm-exegesis] Update doc to mention that the output is in html. 
llvm-svn: 332980
 2018-05-22 13:36:29 +00:00
Clement Courbet 5ec03cdaa3 [llvm-exegesis] Improve documentation. 
Summary:
- Better flag names.
- Fix flag reference in doc.
- Add usage examples in doc.

Fixes PR37497.

Reviewers: gchatelet

Subscribers: llvm-commits, tschuett

Differential Revision: https://reviews.llvm.org/D47015

llvm-svn: 332708
 2018-05-18 12:33:57 +00:00
Clement Courbet ac74acdefe Re-land r329156 "Add llvm-exegesis tool." 
Fixed to depend on and initialize the native target instead of X86.

llvm-svn: 329169
 2018-04-04 11:37:06 +00:00
Clement Courbet 7949b3b1dc Revert r329156 "Add llvm-exegesis tool." 
Breaks a bunch of bots.

llvm-svn: 329157
 2018-04-04 08:22:54 +00:00
Clement Courbet 7287b2c1ec Add llvm-exegesis tool. 
Summary:
[llvm-exegesis][RFC] Automatic Measurement of Instruction Latency/Uops

This is the code corresponding to the RFC "llvm-exegesis Automatic Measurement of Instruction Latency/Uops".

The RFC is available on the LLVM mailing lists as well as the following document
for easier reading:
https://docs.google.com/document/d/1QidaJMJUyQdRrFKD66vE1_N55whe0coQ3h1GpFzz27M/edit?usp=sharing

Subscribers: mgorny, gchatelet, orwant, llvm-commits

Differential Revision: https://reviews.llvm.org/D44519

llvm-svn: 329156
 2018-04-04 08:13:32 +00:00