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Subjectprocessor/X/info implemented, added possibility of throttling CPU manually
Hi!

First, look what my old toshiba can do:

(DaveJ, do you want to try this on your vaio? Maybe you can get 750MHz
from it...)

root@bug:/proc/acpi/processor/0# echo "limit0" > status; showmhz
299.945090 MHz processor.
root@bug:/proc/acpi/processor/0# echo "limit1" > status; showmhz
263.075141 MHz processor.
root@bug:/proc/acpi/processor/0# echo "limit2" > status; showmhz
225.667442 MHz processor.
root@bug:/proc/acpi/processor/0# echo "limit3" > status; showmhz
188.283962 MHz processor.
root@bug:/proc/acpi/processor/0# echo "limit4" > status; showmhz
150.893694 MHz processor.
root@bug:/proc/acpi/processor/0# echo "limit5" > status; showmhz
113.510769 MHz processor.
root@bug:/proc/acpi/processor/0# echo "limit6" > status; showmhz
76.121494 MHz processor.
root@bug:/proc/acpi/processor/0# echo "limit7" > status; showmhz
38.731079 MHz processor.

I can select cpu speed in 38..299MHz range. Nice.

And now, here's the diff to make it possible; please apply.
Pavel

diff -ur -x .dep* -x .hdep* -x *.[oas] -x *~ -x #* -x *CVS* -x *.orig -x *.rej -x *.old -x .menu* -x asm -x local.h -x System.map -x autoconf.h -x compile.h -x version.h -x .version -x defkeymap.c -x uni_hash.tbl -x zImage -x vmlinu?* -x TAGS -x bootsect -x *RCS* -x conmakehash -x map -x build -x build -x configure -x *target* -x *.flags -x *.bak clean/drivers/acpi/ospm/processor/pr_osl.c linux/drivers/acpi/ospm/processor/pr_osl.c
--- clean/drivers/acpi/ospm/processor/pr_osl.c Sun Jul 8 23:26:35 2001
+++ linux/drivers/acpi/ospm/processor/pr_osl.c Tue Jul 10 00:22:20 2001
@@ -29,6 +29,7 @@
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
+#include <asm/uaccess.h>
#include <acpi.h>
#include <bm.h>
#include "pr.h"
@@ -90,6 +91,32 @@
return(len);
}

+int
+pr_osl_proc_write_status(struct file *file, const char *buffer,
+ unsigned long count, void *context)
+{
+ PR_CONTEXT *processor = NULL;
+ int len = 0;
+ char buf[256], buf2[256];
+
+ processor = (PR_CONTEXT*)context;
+
+ if (count > 250)
+ return -EPERM;
+ if (copy_from_user(buf, buffer, count))
+ return -EFAULT;
+ buf[count] = 0;
+ printk("pr_osl_write_status: %s...", buf);
+ if (!strncmp(buf, "limit", 5)) {
+ char *s;
+ int i = simple_strtoul(buf+5, &s, 0);
+ pr_perf_set_state(processor, i);
+ }
+
+ return -EL3RST;
+}
+
+

/****************************************************************************
*
@@ -108,7 +135,7 @@
{
PR_CONTEXT *processor = NULL;
char *p = page;
- int len = 0;
+ int len = 0, i;

if (!context || (off != 0)) {
goto end;
@@ -116,7 +143,12 @@

processor = (PR_CONTEXT*)context;

- p += sprintf(p, "<TBD>\n");
+ p += sprintf(p, "Throttling states: %d\n", processor->performance.state_count);
+ p += sprintf(p, "Power states: %d\n", processor->power.state_count);
+ for (i=0; i<4; i++) {
+ p += sprintf(p, " C%d valid: %d\n", i, processor->power.state[i].is_valid);
+ p += sprintf(p, " C%d latency: %d us\n", i, processor->power.state[i].latency);
+ }

end:
len = (p - page);
@@ -141,7 +173,7 @@
PR_CONTEXT *processor)
{
u32 i = 0;
- struct proc_dir_entry *proc_entry = NULL;
+ struct proc_dir_entry *proc_entry = NULL, *proc;
char processor_uid[16];

if (!processor) {
@@ -164,15 +196,19 @@
sprintf(processor_uid, "%d", processor->uid);

proc_entry = proc_mkdir(processor_uid, pr_proc_root);
- if (!proc_entry) {
+ if (!proc_entry)
return(AE_ERROR);
- }

- create_proc_read_entry(PR_PROC_STATUS, S_IFREG | S_IRUGO,
- proc_entry, pr_osl_proc_read_status, (void*)processor);
+ proc = create_proc_read_entry(PR_PROC_STATUS, S_IFREG | S_IRUGO,
+ proc_entry, pr_osl_proc_read_status, (void*)processor);
+ if (!proc_entry)
+ return(AE_ERROR);
+ proc->write_proc = pr_osl_proc_write_status;

- create_proc_read_entry(PR_PROC_INFO, S_IFREG | S_IRUGO,
- proc_entry, pr_osl_proc_read_info, (void*)processor);
+ proc = create_proc_read_entry(PR_PROC_INFO, S_IFREG | S_IRUGO,
+ proc_entry, pr_osl_proc_read_info, (void*)processor);
+ if (!proc_entry)
+ return(AE_ERROR);

return(AE_OK);
}
--
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org
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