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commit bc33aa5d280cbcd122c3929192fa1aaf83aea223
Author: Carsten Haitzler <ras...@rasterman.com>
AuthorDate: Fri Jan 3 13:18:01 2025 +0000
cpufreq - ensure min cpu freq is real min
---
src/bin/system/e_system_cpufreq.c | 36 +++++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/src/bin/system/e_system_cpufreq.c b/src/bin/system/e_system_cpufreq.c
index 98b195893..95e24ef22 100644
--- a/src/bin/system/e_system_cpufreq.c
+++ b/src/bin/system/e_system_cpufreq.c
@@ -5,6 +5,37 @@
#elif defined __FreeBSD__
// no local funcs
#else
+static int
+sys_cpu_set_all_min_freq(void)
+{
+ int num = 0;
+ char buf[4096];
+ char buf2[256];
+ size_t sz;
+ FILE *f;
+
+ for (;;)
+ {
+ snprintf(buf, sizeof(buf),
+ "/sys/devices/system/cpu/cpu%i/cpufreq/cpuinfo_min_freq", num);
+ f = fopen(buf, "r");
+ if (!f) return num;
+ sz = fread(buf2, 1, sizeof(buf2), f);
+ fclose(f);
+ if (sz > 0)
+ {
+ snprintf(buf, sizeof(buf),
+ "/sys/devices/system/cpu/cpu%i/cpufreq/scaling_min_freq", num);
+ f = fopen(buf, "w");
+ if (!f) return num;
+ fwrite(buf2, 1, sz, f);
+ fclose(f);
+ }
+ num++;
+ }
+ return 0;
+}
+
static int
sys_cpu_setall(const char *control, const char *value)
{
@@ -22,7 +53,7 @@ sys_cpu_setall(const char *control, const char *value)
fclose(f);
num++;
}
- return 1;
+ return 0;
}
static int
@@ -230,6 +261,9 @@ _cb_cpufreq_pwr_set(void *data EINA_UNUSED, const char *params)
#else
int v = atoi(params); // 0->100
+ // ensure min freq is as low as possible
+ sys_cpu_set_all_min_freq();
+
if (v < 0) v = 0;
else if (v > 100) v = 100;
--
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