emo/procps
1
0
Fork 0
Code Issues Pull Requests Packages Releases Activity

top: make the 'cpu_tics' function a tad more efficient

Browse Source 
This patch eliminates one variable which resulted in a
corresponding elimination of three 'mov' instructions.

[ that was 6 bytes per 'mov' for a total of 18 bytes ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner 2020-07-08 00:00:00 -05:00 committed by Craig Small
parent 8c115f6cf3
commit 3e2cd9f87b
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
top/top.c
View File

@ -5348,7 +5348,6 @@ static int cpu_tics (struct stat_stack *this, const char *pfx, int nobuf) {
#define rSv(E) TIC_VAL(E, this)
SIC_t idl_frme, tot_frme;
float scale;
int n;
idl_frme = rSv(stat_IL);
tot_frme = rSv(stat_SUM_TOT);
@ -5379,16 +5378,15 @@ static int cpu_tics (struct stat_stack *this, const char *pfx, int nobuf) {
snprintf(syst, sizeof(syst), gtab[ix].syst, (int)((pct_syst * Graph_adj) + .4), gtab[ix].type);
#endif
snprintf(dual, sizeof(dual), "%s%s", user, syst);
n = cpu_prt(fmtmk("%s ~3%#5.1f~2/%-#5.1f~3 %3.0f[~1%-*s]~1"
return cpu_prt(fmtmk("%s ~3%#5.1f~2/%-#5.1f~3 %3.0f[~1%-*s]~1"
, pfx, pct_user, pct_syst, pct_user + pct_syst, Graph_len +4, dual), nobuf);
} else {
n = cpu_prt(fmtmk(Cpu_States_fmts, pfx
return cpu_prt(fmtmk(Cpu_States_fmts, pfx
, (float)rSv(stat_US) * scale, (float)rSv(stat_SY) * scale
, (float)rSv(stat_NI) * scale, (float)idl_frme * scale
, (float)rSv(stat_IO) * scale, (float)rSv(stat_IR) * scale
, (float)rSv(stat_SI) * scale, (float)rSv(stat_ST) * scale), nobuf);
}
return n;
#undef rSv
} // end: cpu_tics