cpupowerutils - cpufrequtils extended with quite some features

CPU power consumption vs performance tuning is no longer
limited to CPU frequency switching anymore: deep sleep states,
traditional dynamic frequency scaling and hidden turbo/boost
frequencies are tied close together and depend on each other.
The first two exist on different architectures like PPC, Itanium and
ARM, the latter (so far) only on X86. On X86 the APU (CPU+GPU) will
only run most efficiently if CPU and GPU has proper power management
in place.

Users and Developers want to have *one* tool to get an overview what
their system supports and to monitor and debug CPU power management
in detail. The tool should compile and work on as many architectures
as possible.

Once this tool stabilizes a bit, it is intended to replace the
Intel-specific tools in tools/power/x86

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 196 insertions, 0 deletions

diff --git a/tools/power/cpupower/debug/i386/dump_psb.c b/tools/power/cpupower/debug/i386/dump_psb.c
new file mode 100644
index 000000000000..8d6a47514253
--- /dev/null
+++ b/tools/power/cpupower/debug/i386/dump_psb.c
@@ -0,0 +1,196 @@
+/*
+ * dump_psb. (c) 2004, Dave Jones, Red Hat Inc.
+ * Licensed under the GPL v2.
+ */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+#include <sys/mman.h>
+
+#define LEN (0x100000 - 0xc0000)
+#define OFFSET (0xc0000)
+
+#ifndef __packed
+#define __packed __attribute((packed))
+#endif
+
+static long relevant;
+
+static const int fid_to_mult[32] = {
+	110, 115, 120, 125, 50, 55, 60, 65,
+	70, 75, 80, 85, 90, 95, 100, 105,
+	30, 190, 40, 200, 130, 135, 140, 210,
+	150, 225, 160, 165, 170, 180, -1, -1,
+};
+
+static const int vid_to_voltage[32] = {
+	2000, 1950, 1900, 1850, 1800, 1750, 1700, 1650,
+	1600, 1550, 1500, 1450, 1400, 1350, 1300, 0,
+	1275, 1250, 1225, 1200, 1175, 1150, 1125, 1100,
+	1075, 1050, 1024, 1000, 975, 950, 925, 0,
+};
+
+struct psb_header {
+	char signature[10];
+	u_char version;
+	u_char flags;
+	u_short settlingtime;
+	u_char res1;
+	u_char numpst;
+} __packed;
+
+struct pst_header {
+	u_int32_t cpuid;
+	u_char fsb;
+	u_char maxfid;
+	u_char startvid;
+	u_char numpstates;
+} __packed;
+
+static u_int fsb;
+static u_int sgtc;
+
+static int
+decode_pst(char *p, int npstates)
+{
+	int i;
+	int freq, fid, vid;
+
+	for (i = 0; i < npstates; ++i) {
+		fid = *p++;
+		vid = *p++;
+		freq = 100 * fid_to_mult[fid] * fsb;
+
+		printf("   %2d %8dkHz  FID %02x (%2d.%01d)  VID %02x (%4dmV)\n",
+		       i,
+		       freq,
+		       fid, fid_to_mult[fid]/10, fid_to_mult[fid]%10,
+		       vid, vid_to_voltage[vid]);
+	}
+
+	return 0;
+}
+
+static
+void decode_psb(char *p, int numpst)
+{
+	int i;
+	struct psb_header *psb;
+	struct pst_header *pst;
+
+	psb = (struct psb_header*) p;
+
+	if (psb->version != 0x12)
+		return;
+
+	printf("PSB version: %hhx flags: %hhx settling time %hhuus res1 %hhx num pst %hhu\n",
+			psb->version,
+			psb->flags,
+			psb->settlingtime,
+			psb->res1,
+			psb->numpst);
+	sgtc = psb->settlingtime * 100;
+
+	if (sgtc < 10000)
+		sgtc = 10000;
+
+	p = ((char *) psb) + sizeof(struct psb_header);
+
+	if (numpst < 0)
+		numpst = psb->numpst;
+	else
+		printf("Overriding number of pst :%d\n", numpst);
+
+	for (i = 0; i < numpst; i++) {
+		pst = (struct pst_header*) p;
+
+		if (relevant != 0) {
+			if (relevant!= pst->cpuid)
+				goto next_one;
+		}
+
+		printf("  PST %d  cpuid %.3x fsb %hhu mfid %hhx svid %hhx numberstates %hhu\n",
+				i+1,
+				pst->cpuid,
+				pst->fsb,
+				pst->maxfid,
+				pst->startvid,
+				pst->numpstates);
+
+		fsb = pst->fsb;
+		decode_pst(p + sizeof(struct pst_header), pst->numpstates);
+
+next_one:
+		p += sizeof(struct pst_header) + 2*pst->numpstates;
+	}
+
+}
+
+static struct option info_opts[] = {
+	{.name = "numpst",	.has_arg=no_argument,	.flag=NULL, .val='n'},
+};
+
+void print_help(void)
+{
+	printf ("Usage: dump_psb [options]\n");
+	printf ("Options:\n");
+	printf ("  -n, --numpst     Set number of PST tables to scan\n");
+	printf ("  -r, --relevant   Only display PSTs relevant to cpuid N\n");
+}
+
+int
+main(int argc, char *argv[])
+{
+	int fd;
+	int numpst=-1;
+	int ret=0, cont=1;
+	char *mem = NULL;
+	char *p;
+
+	do {
+		ret = getopt_long(argc, argv, "hr:n:", info_opts, NULL);
+		switch (ret){
+		case '?':
+		case 'h':
+			print_help();
+			cont = 0;
+			break;
+		case 'r':
+			relevant = strtol(optarg, NULL, 16);
+			break;
+		case 'n':
+			numpst = strtol(optarg, NULL, 10);
+			break;
+		case -1:
+			cont = 0;
+			break;
+		}
+
+	} while(cont);
+
+	fd = open("/dev/mem", O_RDONLY);
+	if (fd < 0) {
+		printf ("Couldn't open /dev/mem. Are you root?\n");
+		exit(1);
+	}
+
+	mem = mmap(mem, 0x100000 - 0xc0000, PROT_READ, MAP_SHARED, fd, 0xc0000);
+	close(fd);
+
+	for (p = mem; p - mem < LEN; p+=16) {
+		if (memcmp(p, "AMDK7PNOW!", 10) == 0) {
+			decode_psb(p, numpst);
+			break;
+		}
+	}
+
+	munmap(mem, LEN);
+	return 0;
+}