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ProcessList_buildTree: skip hashtable if known root 

Don't waste time looking up the parent if the current process is already
known to be a root process.
This commit is contained in:
Denis Lisov 2022-01-07 02:23:21 +03:00 committed by BenBE
parent deb05fe7c2
commit 79a6f6cb5b
1 changed files with 6 additions and 2 deletions
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8
ProcessList.c
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@ -274,13 +274,17 @@ static void ProcessList_buildTree(ProcessList* this) {
// If PID corresponds with PPID (e.g. "kernel_task" (PID:0, PPID:0) // If PID corresponds with PPID (e.g. "kernel_task" (PID:0, PPID:0)
// on Mac OS X 10.11.6) regard this process as root. // on Mac OS X 10.11.6) regard this process as root.
if (process->pid == ppid) if (process->pid == ppid) {
process->isRoot = true; process->isRoot = true;
continue;
}
// On Linux both the init process (pid 1) and the root UMH kernel thread (pid 2) // On Linux both the init process (pid 1) and the root UMH kernel thread (pid 2)
// use a ppid of 0. As that PID can't exist, we can skip searching for it. // use a ppid of 0. As that PID can't exist, we can skip searching for it.
if (!ppid) if (!ppid) {
process->isRoot = true; process->isRoot = true;
continue;
}
// We don't know about its parent for whatever reason // We don't know about its parent for whatever reason
if (ProcessList_findProcess(this, ppid) == NULL) if (ProcessList_findProcess(this, ppid) == NULL)