class Sampler
Defined at line 54 of file ../../src/performance/cpu_profiler/sampler.h
Protected Members
async_dispatcher_t * dispatcher_TargetTree targets_vector sample_specs_vector inspecting_durations_function sample_cb_unordered_map process_watchers_unordered_map job_watchers_map contexts_unordered_set pending_module_caches_Public Methods
void Sampler (async_dispatcher_t *dispatcher,TargetTreetargets,std::vector<fuchsia_cpu_profiler::SamplingConfig>sample_specs,SampleCallbacksample_cb)
Defined at line 56 of file ../../src/performance/cpu_profiler/sampler.h
fxl::WeakPtr<Sampler> GetWeakPtr ()Defined at line 70 of file ../../src/performance/cpu_profiler/sampler.h
std::optional<std::string_view> GetProcessName (zx_koid_t pid)Defined at line 72 of file ../../src/performance/cpu_profiler/sampler.h
std::optional<std::string_view> GetThreadName (zx_koid_t tid)Defined at line 75 of file ../../src/performance/cpu_profiler/sampler.h
std::vector<zx::ticks> SamplingDurations ()Defined at line 78 of file ../../src/performance/cpu_profiler/sampler.h
void ~Sampler ()Defined at line 80 of file ../../src/performance/cpu_profiler/sampler.h
zx::result<> Start (size_t buffer_size_mb)Defined at line 236 of file ../../src/performance/cpu_profiler/sampler.cc
zx::result<> Stop ()Defined at line 247 of file ../../src/performance/cpu_profiler/sampler.cc
zx::result<profiler::SymbolizationContext> GetContexts ()Return the information needed to symbolize the samples
Defined at line 290 of file ../../src/performance/cpu_profiler/sampler.cc
zx::result<> AddTarget (JobTarget && target)Defined at line 107 of file ../../src/performance/cpu_profiler/sampler.cc
Protected Methods
zx::result<> WatchTargets ()Defined at line 180 of file ../../src/performance/cpu_profiler/sampler.cc
zx::result<> WatchTarget (const JobTarget & target)Defined at line 116 of file ../../src/performance/cpu_profiler/sampler.cc
void AddThread (std::vector<zx_koid_t>job_path,zx_koid_tpid,zx_koid_ttid,zx::threadt)
Defined at line 312 of file ../../src/performance/cpu_profiler/sampler.cc
void RemoveThread (std::vector<zx_koid_t>job_path,zx_koid_tpid,zx_koid_ttid)
Defined at line 328 of file ../../src/performance/cpu_profiler/sampler.cc
void CollectSamples (async_dispatcher_t *dispatcher,async::TaskBase *task,zx_status_tstatus)
Defined at line 254 of file ../../src/performance/cpu_profiler/sampler.cc
void CacheModules (const ProcessTarget & p)Defined at line 337 of file ../../src/performance/cpu_profiler/sampler.cc
void ScheduleCacheModules (std::vector<zx_koid_t> job_path, zx_koid_t pid)Cache the modules of process `pid` from a separate dispatcher task.
Thread start exceptions keep the new thread paused until they are handled, and reading a
process's modules can be slow (e.g. for Starnix processes with large address spaces). Calling
this from a thread start handler instead of CacheModules lets the new thread, and any other
thread start/exit queued behind it, proceed without waiting on the module scan.
Defined at line 359 of file ../../src/performance/cpu_profiler/sampler.cc
void AddProcessesStartedSinceConfigure ()The target tree is populated when the session is configured, which can take a long time for
large targets (e.g. the whole system), and processes and threads keep starting in the meantime.
These add the ones that started since then, so that they aren't silently left out of the
session.
Call AddProcessesStartedSinceConfigure after watching the target jobs, and
AddThreadsStartedSinceConfigure after watching `process`, so that anything starting later is
reported by the watchers instead.
Defined at line 381 of file ../../src/performance/cpu_profiler/sampler.cc
void AddThreadsStartedSinceConfigure (std::span<const zx_koid_t> job_path, const ProcessTarget & process)Defined at line 482 of file ../../src/performance/cpu_profiler/sampler.cc