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nmeter: fix block i/o count on newer Linux kernels

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-11-01 23:34:46 +01:00
parent f8a5b792ba
commit 3b1603410a
1 changed files with 38 additions and 12 deletions
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50
procps/nmeter.c
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@ -274,30 +274,56 @@ static int rdval_loadavg(const char* p, ullong *vec, ...)
// 1 2 3 4 5 6(rd) 7 8 9 10(wr) 11 12 13 14
// 3 0 hda 51292 14441 841783 926052 25717 79650 843256 3029804 0 148459 3956933
// 3 1 hda1 0 0 0 0 <- ignore if only 4 fields
// Linux 3.0 (maybe earlier) started printing full stats for hda1 too.
// Had to add code which skips such devices.
static int rdval_diskstats(const char* p, ullong *vec)
{
ullong rd = rd; // for compiler
int indexline = 0;
char devname[32];
unsigned devname_len = 0;
int value_idx = 0;
vec[0] = 0;
vec[1] = 0;
while (1) {
indexline++;
while (*p == ' ' || *p == '\t') p++;
if (*p == '\0') break;
value_idx++;
while (*p == ' ' || *p == '\t')
p++;
if (*p == '\0')
break;
if (*p == '\n') {
indexline = 0;
value_idx = 0;
p++;
continue;
}
if (indexline == 6) {
rd = strtoull(p, NULL, 10);
} else if (indexline == 10) {
vec[0] += rd; // TODO: *sectorsize (don't know how to find out sectorsize)
if (value_idx == 3) {
char *end = strchrnul(p, ' ');
/* If this a hda1-like device (same prefix as last one + digit)? */
if (devname_len && strncmp(devname, p, devname_len) == 0 && isdigit(p[devname_len])) {
p = end;
goto skip_line; /* skip entire line */
}
/* It is not. Remember the name for future checks */
devname_len = end - p;
if (devname_len > sizeof(devname)-1)
devname_len = sizeof(devname)-1;
strncpy(devname, p, devname_len);
/* devname[devname_len] = '\0'; - not really needed */
p = end;
} else
if (value_idx == 6) {
// TODO: *sectorsize (don't know how to find out sectorsize)
vec[0] += strtoull(p, NULL, 10);
} else
if (value_idx == 10) {
// TODO: *sectorsize (don't know how to find out sectorsize)
vec[1] += strtoull(p, NULL, 10);
while (*p != '\n' && *p != '\0') p++;
skip_line:
while (*p != '\n' && *p != '\0')
p++;
continue;
}
while (*p > ' ') p++; // skip over value
while ((unsigned char)(*p) > ' ') // skip over value
p++;
}
return 0;
}