35138437ef
This patch adds three separate per-process fault counters:
- Inode faults
An inode fault happens when we've memory-mapped a file from disk
and we end up having to load 1 page (4KB) of the file into memory.
- Zero faults
Memory returned by mmap() is lazily zeroed out. Every time we have
to zero out 1 page, we count a zero fault.
- CoW faults
VM objects can be shared by multiple mappings that make their own
unique copy iff they want to modify it. The typical reason here is
memory shared between a parent and child process.
43 lines
866 B
C++
43 lines
866 B
C++
#pragma once
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#include <AK/String.h>
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#include <AK/HashMap.h>
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struct CProcessStatistics {
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// Keep this in sync with /proc/all.
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// From the kernel side:
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pid_t pid;
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unsigned times_scheduled;
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unsigned pgid;
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unsigned pgp;
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unsigned sid;
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uid_t uid;
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gid_t gid;
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String state;
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pid_t ppid;
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unsigned nfds;
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String name;
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String tty;
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size_t amount_virtual;
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size_t amount_resident;
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size_t amount_shared;
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unsigned ticks;
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String priority;
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unsigned syscall_count;
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unsigned inode_faults;
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unsigned zero_faults;
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unsigned cow_faults;
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int icon_id;
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// synthetic
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String username;
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};
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class CProcessStatisticsReader {
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public:
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static HashMap<pid_t, CProcessStatistics> get_all();
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private:
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static String username_from_uid(uid_t);
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static HashMap<uid_t, String> s_usernames;
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};
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