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Code Issues Projects Releases Packages Wiki Activity Actions 9

ProcessManager: Keep /proc/all open to reduce CPU impact of ProcessManager.

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This commit is contained in:
Andreas Kling 2019-05-14 17:12:35 +02:00
parent 2e0d8ee98f
commit 2fa5e2b66b
Notes: sideshowbarker 2024-07-19 14:08:54 +09:00
2 changed files with 10 additions and 7 deletions
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15
Applications/ProcessManager/ProcessModel.cpp
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@ -7,7 +7,13 @@
ProcessModel::ProcessModel(GraphWidget& graph)
: m_graph(graph)
, m_proc_all("/proc/all")
{
if (!m_proc_all.open(CIODevice::ReadOnly)) {
fprintf(stderr, "ProcessManager: Failed to open /proc/all: %s\n", m_proc_all.error_string());
exit(1);
}
setpwent();
while (auto* passwd = getpwent())
m_usernames.set(passwd->pw_uid, passwd->pw_name);
@ -137,12 +143,7 @@ GVariant ProcessModel::data(const GModelIndex& index, Role role) const
void ProcessModel::update()
{
CFile file("/proc/all");
if (!file.open(CIODevice::ReadOnly)) {
fprintf(stderr, "ProcessManager: Failed to open /proc/all: %s\n", file.error_string());
exit(1);
return;
}
m_proc_all.seek(0);
unsigned last_sum_nsched = 0;
for (auto& it : m_processes)
@ -151,7 +152,7 @@ void ProcessModel::update()
HashTable<pid_t> live_pids;
unsigned sum_nsched = 0;
for (;;) {
auto line = file.read_line(1024);
auto line = m_proc_all.read_line(1024);
if (line.is_empty())
break;
auto chomped = String((const char*)line.pointer(), line.size() - 1, Chomp);