mirror of https://github.com/xzeldon/htop.git
Performance improvements due to conditional parsing of IO data depending on selected fields.
On my machine, this gives a ~20% improvement in htop process time use with the default config.
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parent
5c2d84aba3
commit
6cfa9e0bf2
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@ -3,6 +3,8 @@ What's new in version 1.0.3
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* Performance improvements
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(thanks to Jann Horn)
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* Further performance improvements due to conditional parsing
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of IO data depending on selected fields.
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What's new in version 1.0.2
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@ -122,11 +122,14 @@ void ColumnsPanel_update(Panel* super) {
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// FIXME: this is crappily inefficient
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free(this->settings->pl->fields);
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this->settings->pl->fields = (ProcessField*) malloc(sizeof(ProcessField) * (size+1));
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this->settings->pl->flags = 0;
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for (int i = 0; i < size; i++) {
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char* text = ((ListItem*) Panel_get(super, i))->value;
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int j = ColumnsPanel_fieldNameToIndex(text);
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if (j > 0)
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if (j > 0) {
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this->settings->pl->fields[i] = j;
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this->settings->pl->flags |= Process_fieldFlags[j];
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}
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}
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this->settings->pl->fields[size] = 0;
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}
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31
Process.c
31
Process.c
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@ -45,6 +45,12 @@ in the source distribution for its full text.
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#include "IOPriority.h"
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#include <sys/types.h>
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#define PROCESS_FLAG_IO 1
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#define PROCESS_FLAG_IOPRIO 2
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#define PROCESS_FLAG_OPENVZ 4
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#define PROCESS_FLAG_VSERVER 8
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#define PROCESS_FLAG_CGROUP 16
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#ifndef Process_isKernelThread
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#define Process_isKernelThread(_process) (_process->pgrp == 0)
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#endif
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@ -201,6 +207,31 @@ const char *Process_fieldNames[] = {
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"*** report bug! ***"
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};
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const int Process_fieldFlags[] = {
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0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0,
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#ifdef HAVE_OPENVZ
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PROCESS_FLAG_OPENVZ, PROCESS_FLAG_OPENVZ,
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#endif
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#ifdef HAVE_VSERVER
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PROCESS_FLAG_VSERVER,
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#endif
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#ifdef HAVE_TASKSTATS
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PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO,
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PROCESS_FLAG_IO, PROCESS_FLAG_IO, PROCESS_FLAG_IO,
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#endif
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#ifdef HAVE_CGROUP
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PROCESS_FLAG_CGROUP,
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#endif
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PROCESS_FLAG_IOPRIO
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};
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const char *Process_fieldTitles[] = {
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"", " PID ", "Command ", "S ", " PPID ", " PGRP ", " SESN ",
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" TTY ", " TPGID ", "- ", "- ", "- ", "- ", "- ",
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@ -24,6 +24,12 @@ in the source distribution for its full text.
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#include "IOPriority.h"
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#include <sys/types.h>
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#define PROCESS_FLAG_IO 1
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#define PROCESS_FLAG_IOPRIO 2
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#define PROCESS_FLAG_OPENVZ 4
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#define PROCESS_FLAG_VSERVER 8
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#define PROCESS_FLAG_CGROUP 16
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#ifndef Process_isKernelThread
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#define Process_isKernelThread(_process) (_process->pgrp == 0)
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#endif
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@ -155,6 +161,8 @@ typedef struct Process_ {
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extern const char *Process_fieldNames[];
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extern const int Process_fieldFlags[];
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extern const char *Process_fieldTitles[];
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@ -133,6 +133,7 @@ typedef struct ProcessList_ {
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unsigned long long int usedSwap;
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unsigned long long int freeSwap;
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int flags;
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ProcessField* fields;
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ProcessField sortKey;
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int direction;
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@ -235,8 +236,10 @@ ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList) {
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this->fields = calloc(sizeof(ProcessField), LAST_PROCESSFIELD+1);
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// TODO: turn 'fields' into a Vector,
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// (and ProcessFields into proper objects).
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this->flags = 0;
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for (int i = 0; defaultHeaders[i]; i++) {
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this->fields[i] = defaultHeaders[i];
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this->fields[i] |= Process_fieldFlags[defaultHeaders[i]];
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}
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this->sortKey = PERCENT_CPU;
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this->direction = 1;
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@ -738,7 +741,8 @@ static bool ProcessList_processEntries(ProcessList* this, const char* dirname, P
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ProcessList_processEntries(this, subdirname, process, period, tv);
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#ifdef HAVE_TASKSTATS
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ProcessList_readIoFile(process, dirname, name, now);
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if (this->flags & PROCESS_FLAG_IO)
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ProcessList_readIoFile(process, dirname, name, now);
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#endif
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if (! ProcessList_readStatmFile(process, dirname, name))
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@ -750,7 +754,8 @@ static bool ProcessList_processEntries(ProcessList* this, const char* dirname, P
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unsigned long long int lasttimes = (process->utime + process->stime);
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if (! ProcessList_readStatFile(process, dirname, name, command))
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goto errorReadingProcess;
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Process_updateIOPriority(process);
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if (this->flags & PROCESS_FLAG_IOPRIO)
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Process_updateIOPriority(process);
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float percent_cpu = (process->utime + process->stime - lasttimes) / period * 100.0;
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process->percent_cpu = MAX(MIN(percent_cpu, cpus*100.0), 0.0);
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if (isnan(process->percent_cpu)) process->percent_cpu = 0.0;
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@ -764,15 +769,18 @@ static bool ProcessList_processEntries(ProcessList* this, const char* dirname, P
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process->user = UsersTable_getRef(this->usersTable, process->st_uid);
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#ifdef HAVE_OPENVZ
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ProcessList_readOpenVZData(process, dirname, name);
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if (this->flags & PROCESS_FLAG_OPENVZ)
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ProcessList_readOpenVZData(process, dirname, name);
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#endif
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#ifdef HAVE_CGROUP
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ProcessList_readCGroupFile(process, dirname, name);
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if (this->flags & PROCESS_FLAG_CGROUP)
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ProcessList_readCGroupFile(process, dirname, name);
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#endif
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#ifdef HAVE_VSERVER
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ProcessList_readVServerData(process, dirname, name);
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if (this->flags & PROCESS_FLAG_VSERVER)
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ProcessList_readVServerData(process, dirname, name);
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#endif
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if (! ProcessList_readCmdlineFile(process, dirname, name))
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@ -113,6 +113,7 @@ typedef struct ProcessList_ {
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unsigned long long int usedSwap;
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unsigned long long int freeSwap;
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int flags;
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ProcessField* fields;
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ProcessField sortKey;
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int direction;
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@ -82,11 +82,13 @@ static bool Settings_read(Settings* this, char* fileName, int cpuCount) {
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char** ids = String_split(trim, ' ', &nIds);
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free(trim);
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int i, j;
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this->pl->flags = 0;
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for (j = 0, i = 0; i < LAST_PROCESSFIELD && ids[i]; i++) {
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// This "+1" is for compatibility with the older enum format.
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int id = atoi(ids[i]) + 1;
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if (id > 0 && id < LAST_PROCESSFIELD) {
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this->pl->fields[j] = id;
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this->pl->flags |= Process_fieldFlags[id];
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j++;
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}
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}
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