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FS-11189: [core] add func to parse cpu string

This commit is contained in:
Seven Du 2018-06-13 13:52:18 +08:00 committed by Muteesa Fred
parent 7f3878dfcb
commit e1e8ebc0ab
1 changed files with 55 additions and 0 deletions
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55
src/include/switch_utils.h
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@ -1084,6 +1084,61 @@ static inline int32_t switch_parse_bandwidth_string(const char *bwv)
return (int32_t) roundf(bw);
}
static inline uint32_t switch_parse_cpu_string(const char *cpu)
{
int cpu_count = switch_core_cpu_count();
int ncpu = cpu_count;
if (!cpu) return 1;
if (!strcasecmp(cpu, "auto")) {
if (cpu_count > 4) return 4;
if (cpu_count <= 2) return 1;
return (uint32_t)(cpu_count / 2);
}
if (!strncasecmp(cpu, "cpu/", 4)) { /* cpu/2 or cpu/2/<max> */
const char *has_max = cpu;
float divisor;
int max = cpu_count;
cpu +=4;
has_max = strchr(cpu, '/');
if (has_max > cpu) {
max = atoi(has_max + 1);
}
divisor = atof(cpu);
if (divisor <= 0) divisor = 1;
ncpu = cpu_count / divisor;
if (ncpu <= 0) return 1;
if (ncpu > max) return (uint32_t)max;
return (uint32_t)ncpu;
} else if (!strcasecmp(cpu, "cpu")) {
ncpu = cpu_count;
} else {
ncpu = atoi(cpu);
if (cpu && strrchr(cpu, '%')) {
ncpu = (int) (cpu_count * ((float)ncpu / 100));
}
}
if (ncpu > cpu_count) return (uint32_t)cpu_count;
if (ncpu <= 0) return 1;
return ncpu;
}
static inline int switch_needs_url_encode(const char *s)
{
const char hex[] = "0123456789ABCDEF";