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| author | Denis Vlasenko | 2007-07-15 19:23:38 +0000 |
|---|---|---|
| committer | Denis Vlasenko | 2007-07-15 19:23:38 +0000 |
| commit | c1166c3a8c8cd4507a1dcd1ea3b3e1af9b24b319 (patch) | |
| tree | dff839e17d8b7748c8ca9bfb004f5043a4e660b8 | |
| parent | 9109fbeaa115f8d8364e40d866914cc9e46d51e5 (diff) | |
| download | busybox-c1166c3a8c8cd4507a1dcd1ea3b3e1af9b24b319.zip busybox-c1166c3a8c8cd4507a1dcd1ea3b3e1af9b24b319.tar.gz | |
top: simpler loadavg processing
display_status 1787 1726 -61
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(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-61) Total: -61 bytes
text data bss dec hex filename
677244 3344 13936 694524 a98fc busybox_old
677180 3344 13936 694460 a98bc busybox_unstripped
| -rw-r--r-- | procps/top.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/procps/top.c b/procps/top.c index cd55ea3..22ac49c 100644 --- a/procps/top.c +++ b/procps/top.c @@ -219,7 +219,6 @@ static unsigned long display_generic(int scr_width) FILE *fp; char buf[80]; char scrbuf[80]; - char *end; unsigned long total, used, mfree, shared, buffers, cached; /* read memory info */ @@ -272,18 +271,15 @@ static unsigned long display_generic(int scr_width) /* read load average as a string */ buf[0] = '\0'; - open_read_close("loadavg", buf, sizeof(buf)); - end = strchr(buf, ' '); - if (end) end = strchr(end+1, ' '); - if (end) end = strchr(end+1, ' '); - if (end) *end = '\0'; + open_read_close("loadavg", buf, sizeof("N.NN N.NN N.NN")-1); + buf[sizeof("N.NN N.NN N.NN")-1] = '\0'; /* output memory info and load average */ /* clear screen & go to top */ if (scr_width > sizeof(scrbuf)) scr_width = sizeof(scrbuf); snprintf(scrbuf, scr_width, - "Mem: %ldK used, %ldK free, %ldK shrd, %ldK buff, %ldK cached", + "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached", used, mfree, shared, buffers, cached); printf(OPT_BATCH_MODE ? "%s\n" : "\e[H\e[J%s\n", scrbuf); @@ -292,18 +288,20 @@ static unsigned long display_generic(int scr_width) /* * xxx% = (jif.xxx - prev_jif.xxx) / (jif.total - prev_jif.total) * 100% */ - /* using (unsigned) cast to make multiplication cheaper: */ + /* using (unsigned) casts to make multiplication cheaper: */ + unsigned total_diff = ((unsigned)(jif.total - prev_jif.total) ? : 1); #if ENABLE_FEATURE_TOP_DECIMALS /* Generated code is approx +0.5k */ #define CALC_STAT(xxx) div_t xxx = div(1000 * (unsigned)(jif.xxx - prev_jif.xxx) / total_diff, 10) #define SHOW_STAT(xxx) xxx.quot, '0'+xxx.rem +/* %3u in practice almost never displays "100" + * and thus has implicit leading space: " 99" */ #define FMT "%3u.%c%%" #else #define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(jif.xxx - prev_jif.xxx) / total_diff #define SHOW_STAT(xxx) xxx -#define FMT "%3u%%" +#define FMT "%4u%%" #endif - unsigned total_diff = (jif.total - prev_jif.total ? : 1); CALC_STAT(usr); CALC_STAT(sys); CALC_STAT(nic); @@ -314,9 +312,7 @@ static unsigned long display_generic(int scr_width) //CALC_STAT(steal); snprintf(scrbuf, scr_width, - /* Barely fits in 79 chars when in "decimals" mode. - * %3u in practice almost never displays "100" - * and thus has implicit leading space: " 99" */ + /* Barely fits in 79 chars when in "decimals" mode. */ "CPU:"FMT" usr"FMT" sys"FMT" nice"FMT" idle"FMT" io"FMT" irq"FMT" softirq", SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle), SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq) @@ -344,7 +340,7 @@ static unsigned long display_generic(int scr_width) #define UPSCALE 100 #define CALC_STAT(name, val) unsigned name = (val) #define SHOW_STAT(name) name -#define FMT " %3u%%" +#define FMT "%4u%%" #endif /* display process statuses */ static void display_status(int count, int scr_width) |