bdf3e7e5b8
I'm adding two new classes that can be used to measure the duration of long tasks as process and thread level, e.g. decoding, fetching data from lldb-server, etc. In this first patch, I'm using it to measure the time it takes to decode each thread, which is printed out with the `dump info` command. In a later patch I'll start adding process-level tasks and I might move these classes to the upper Trace level, instead of having them in the intel-pt plugin. I might need to do that anyway in the future when we have to measure HTR. For now, I want to keep the impact of this change minimal. With it, I was able to generate the following info of a very big trace: ``` (lldb) thread trace dump info Trace technology: intel-pt thread #1: tid = 616081 Total number of instructions: 9729366 Memory usage: Raw trace size: 1024 KiB Total approximate memory usage (excluding raw trace): 123517.34 KiB Average memory usage per instruction (excluding raw trace): 13.00 bytes Timing: Decoding instructions: 1.62s Errors: Number of TSC decoding errors: 0 ``` As seen above, it took 1.62 seconds to decode 9.7M instructions. This is great news, as we don't need to do any optimization work in this area. Differential Revision: https://reviews.llvm.org/D123357
111 lines
4.0 KiB
Python
111 lines
4.0 KiB
Python
import lldb
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from intelpt_testcase import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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from lldbsuite.test.decorators import *
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class TestTraceLoad(TraceIntelPTTestCaseBase):
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mydir = TestBase.compute_mydir(__file__)
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NO_DEBUG_INFO_TESTCASE = True
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def testLoadTrace(self):
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src_dir = self.getSourceDir()
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trace_definition_file = os.path.join(src_dir, "intelpt-trace", "trace.json")
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self.expect("trace load -v " + trace_definition_file, substrs=["intel-pt"])
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target = self.dbg.GetSelectedTarget()
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process = target.GetProcess()
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self.assertEqual(process.GetProcessID(), 1234)
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self.assertEqual(process.GetNumThreads(), 1)
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self.assertEqual(process.GetThreadAtIndex(0).GetThreadID(), 3842849)
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self.assertEqual(target.GetNumModules(), 1)
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module = target.GetModuleAtIndex(0)
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path = module.GetFileSpec()
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self.assertEqual(path.fullpath, os.path.join(src_dir, "intelpt-trace", "a.out"))
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self.assertGreater(module.GetNumSections(), 0)
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self.assertEqual(module.GetSectionAtIndex(0).GetFileAddress(), 0x400000)
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self.assertEqual("6AA9A4E2-6F28-2F33-377D-59FECE874C71-5B41261A", module.GetUUIDString())
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# check that the Process and Thread objects were created correctly
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self.expect("thread info", substrs=["tid = 3842849"])
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self.expect("thread list", substrs=["Process 1234 stopped", "tid = 3842849"])
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self.expect("thread trace dump info", substrs=['''Trace technology: intel-pt
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thread #1: tid = 3842849
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Total number of instructions: 21
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Memory usage:
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Raw trace size: 4 KiB
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Total approximate memory usage (excluding raw trace): 0.27 KiB
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Average memory usage per instruction (excluding raw trace): 13.00 bytes
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Timing:
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Decoding instructions: ''', '''s
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Errors:
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Number of TSC decoding errors: 0'''])
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def testLoadInvalidTraces(self):
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src_dir = self.getSourceDir()
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# We test first an invalid type
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self.expect("trace load -v " + os.path.join(src_dir, "intelpt-trace", "trace_bad.json"), error=True,
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substrs=['''error: expected object at traceSession.processes[0]
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Context:
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{
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"processes": [
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/* error: expected object */
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123
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],
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"trace": { ... }
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}
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Schema:
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{
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"trace": {
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"type": "intel-pt",
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"cpuInfo": {
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"vendor": "intel" | "unknown",
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"family": integer,
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"model": integer,
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"stepping": integer
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}
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},'''])
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# Now we test a missing field in the global session file
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self.expect("trace load -v " + os.path.join(src_dir, "intelpt-trace", "trace_bad2.json"), error=True,
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substrs=['error: missing value at traceSession.processes[1].triple', "Context", "Schema"])
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# Now we test a missing field in the intel-pt settings
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self.expect("trace load -v " + os.path.join(src_dir, "intelpt-trace", "trace_bad4.json"), error=True,
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substrs=['''error: missing value at traceSession.trace.cpuInfo.family
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Context:
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{
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"processes": [],
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"trace": {
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"cpuInfo": /* error: missing value */ {
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"model": 79,
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"stepping": 1,
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"vendor": "intel"
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},
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"type": "intel-pt"
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}
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}''', "Schema"])
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# Now we test an incorrect load address in the intel-pt settings
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self.expect("trace load -v " + os.path.join(src_dir, "intelpt-trace", "trace_bad5.json"), error=True,
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substrs=['error: expected numeric string at traceSession.processes[0].modules[0].loadAddress',
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'"loadAddress": /* error: expected numeric string */ 400000,', "Schema"])
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# The following wrong schema will have a valid target and an invalid one. In the case of failure,
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# no targets should be created.
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self.assertEqual(self.dbg.GetNumTargets(), 0)
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self.expect("trace load -v " + os.path.join(src_dir, "intelpt-trace", "trace_bad3.json"), error=True,
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substrs=['error: missing value at traceSession.processes[1].pid'])
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self.assertEqual(self.dbg.GetNumTargets(), 0)
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