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Simplify statm parsing and document unused fields

This commit is contained in:
Christian Göttsche 2020-09-28 12:01:56 +02:00 committed by cgzones
parent 3653ee35c5
commit 954d6c12f5
2 changed files with 15 additions and 20 deletions
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4
linux/LinuxProcess.c
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@ -67,8 +67,8 @@ ProcessFieldData Process_fields[] = {
[M_SHARE] = { .name = "M_SHARE", .title = " SHR ", .description = "Size of the process's shared pages", .flags = 0, },
[M_TRS] = { .name = "M_TRS", .title = " CODE ", .description = "Size of the text segment of the process", .flags = 0, },
[M_DRS] = { .name = "M_DRS", .title = " DATA ", .description = "Size of the data segment plus stack usage of the process", .flags = 0, },
[M_LRS] = { .name = "M_LRS", .title = " LIB ", .description = "The library size of the process", .flags = 0, },
[M_DT] = { .name = "M_DT", .title = " DIRTY ", .description = "Size of the dirty pages of the process", .flags = 0, },
[M_LRS] = { .name = "M_LRS", .title = " LIB ", .description = "The library size of the process (unused since Linux 2.6; always 0)", .flags = 0, },
[M_DT] = { .name = "M_DT", .title = " DIRTY ", .description = "Size of the dirty pages of the process (unused since Linux 2.6; always 0)", .flags = 0, },
[ST_UID] = { .name = "ST_UID", .title = " UID ", .description = "User ID of the process owner", .flags = 0, },
[PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, },
[PERCENT_MEM] = { .name = "PERCENT_MEM", .title = "MEM% ", .description = "Percentage of the memory the process is using, based on resident memory size", .flags = 0, },

31
linux/LinuxProcessList.c
View File

@ -406,25 +406,20 @@ static void LinuxProcessList_readIoFile(LinuxProcess* process, const char* dirna
static bool LinuxProcessList_readStatmFile(LinuxProcess* process, const char* dirname, const char* name) {
char filename[MAX_NAME+1];
xSnprintf(filename, MAX_NAME, "%s/%s/statm", dirname, name);
int fd = open(filename, O_RDONLY);
if (fd == -1)
xSnprintf(filename, sizeof(filename), "%s/%s/statm", dirname, name);
FILE* statmfile = fopen(filename, "r");
if (!statmfile)
return false;
char buf[PROC_LINE_LENGTH + 1];
ssize_t rres = xread(fd, buf, PROC_LINE_LENGTH);
close(fd);
if (rres < 1) return false;
char *p = buf;
errno = 0;
process->super.m_size = strtol(p, &p, 10); if (*p == ' ') p++;
process->super.m_resident = strtol(p, &p, 10); if (*p == ' ') p++;
process->m_share = strtol(p, &p, 10); if (*p == ' ') p++;
process->m_trs = strtol(p, &p, 10); if (*p == ' ') p++;
process->m_lrs = strtol(p, &p, 10); if (*p == ' ') p++;
process->m_drs = strtol(p, &p, 10); if (*p == ' ') p++;
process->m_dt = strtol(p, &p, 10);
return (errno == 0);
int r = fscanf(statmfile, "%ld %ld %ld %ld %ld %ld %ld",
&process->super.m_size,
&process->super.m_resident,
&process->m_share,
&process->m_trs,
&process->m_lrs,
&process->m_drs,
&process->m_dt);
fclose(statmfile);
return r == 7;
}
static bool LinuxProcessList_readSmapsFile(LinuxProcess* process, const char* dirname, const char* name, bool haveSmapsRollup) {