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Performance improvements due to conditional parsing of IO data depending on selected fields.

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On my machine, this gives a ~20% improvement in htop process time use with the default config.
This commit is contained in:
Hisham Muhammad
2013-05-24 22:46:01 +00:00
parent 5c2d84aba3
commit 6cfa9e0bf2
7 changed files with 61 additions and 6 deletions
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31
Process.c
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@ -45,6 +45,12 @@ in the source distribution for its full text.
#include "IOPriority.h"
#include <sys/types.h>
#define PROCESS_FLAG_IO 1
#define PROCESS_FLAG_IOPRIO 2
#define PROCESS_FLAG_OPENVZ 4
#define PROCESS_FLAG_VSERVER 8
#define PROCESS_FLAG_CGROUP 16
#ifndef Process_isKernelThread
#define Process_isKernelThread(_process) (_process->pgrp == 0)
#endif
@ -201,6 +207,31 @@ const char *Process_fieldNames[] = {
"*** report bug! ***"
};
const int Process_fieldFlags[] = {
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0,
#ifdef HAVE_OPENVZ
PROCESS_FLAG_OPENVZ, PROCESS_FLAG_OPENVZ,
#endif
#ifdef HAVE_VSERVER
PROCESS_FLAG_VSERVER,
#endif
#ifdef HAVE_TASKSTATS
PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO,
PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO,
#endif
#ifdef HAVE_CGROUP
PROCESS_FLAG_CGROUP,
#endif
PROCESS_FLAG_IOPRIO
};
const char *Process_fieldTitles[] = {
"", " PID ", "Command ", "S ", " PPID ", " PGRP ", " SESN ",
" TTY ", " TPGID ", "- ", "- ", "- ", "- ", "- ",