x86: Add xenpm utility to list CPU power info.

Signed-off-by: Lu Guanqun <guanqun.lu@intel.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

1 files changed, 197 insertions, 0 deletions

diff --git a/tools/misc/xenpm.c b/tools/misc/xenpm.c
new file mode 100644
index 0000000000..b705f0a6fa
--- /dev/null
+++ b/tools/misc/xenpm.c
@@ -0,0 +1,197 @@
+/*
+ * xenpm.c: list the power information of the available processors
+ * Copyright (c) 2008, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <errno.h>
+
+#include <xenctrl.h>
+#include <inttypes.h>
+
+int main(int argc, char **argv)
+{
+    int xc_fd;
+    int i, j, ret = 0;
+    int cinfo = 0, pinfo = 0;
+    int ch;
+    xc_physinfo_t physinfo = { 0 };
+
+    while ( (ch = getopt(argc, argv, "cp")) != -1 )
+    {
+        switch ( ch )
+        {
+        case 'c':
+            cinfo = 1;
+            break;
+        case 'p':
+            pinfo = 1;
+            break;
+        default:
+            fprintf(stderr, "%s [-p] [-c]\n", argv[0]);
+            return -1;
+        }
+    }
+
+    if ( !cinfo && !pinfo )
+    {
+        cinfo = 1;
+        pinfo = 1;
+    }
+
+    xc_fd = xc_interface_open();
+    if ( xc_fd < 0 )
+    {
+        fprintf(stderr, "failed to get the handler\n");
+        return xc_fd;
+    }
+
+    ret = xc_physinfo(xc_fd, &physinfo);
+    if ( ret )
+    {
+        fprintf(stderr, "failed to get the processor information\n");
+        xc_interface_close(xc_fd);
+        return ret;
+    }
+
+    /* print out the C state information */
+    if ( cinfo )
+    {
+        int max_cx_num = 0;
+        struct xc_cx_stat cxstatinfo, *cxstat = &cxstatinfo;
+
+        for ( i = 0; i < physinfo.nr_cpus; i++ )
+        {
+            ret = xc_pm_get_max_cx(xc_fd, i, &max_cx_num);
+            if ( ret )
+            {
+                if ( errno == ENODEV )
+                    fprintf(stderr, "Xen cpuidle is not enabled!\n");
+                else
+                    fprintf(stderr, "failed to get max C-state\n");
+
+                break;
+            }
+
+            cxstat->triggers = malloc(max_cx_num * sizeof(uint64_t));
+            if ( !cxstat->triggers )
+            {
+                fprintf(stderr, "failed to malloc for C-states triggers\n");
+                break;
+            }
+            cxstat->residencies = malloc(max_cx_num * sizeof(uint64_t));
+            if ( !cxstat->residencies )
+            {
+                fprintf(stderr, "failed to malloc for C-states residencies\n");
+                free(cxstat->triggers);
+                break;
+            }
+
+            ret = xc_pm_get_cxstat(xc_fd, i, cxstat);
+            if( ret )
+            {
+                fprintf(stderr, "failed to get C-states statistics information\n");
+                free(cxstat->triggers);
+                free(cxstat->residencies);
+                break;
+            }
+
+            printf("cpu id               : %d\n", i);
+            printf("total C-states       : %d\n", cxstat->nr);
+            printf("idle time(ms)        : %"PRIu64"\n", cxstat->idle_time/1000000UL);
+            for ( j = 0; j < cxstat->nr; j++ )
+            {
+                printf("C%d                   : transition [%020"PRIu64"]\n",
+                       j, cxstat->triggers[j]);
+                printf("                       residency  [%020"PRIu64" ms]\n",
+                       cxstat->residencies[j]*1000000UL/3579/1000000UL);
+            }
+
+            free(cxstat->triggers);
+            free(cxstat->residencies);
+
+            printf("\n");
+        }
+    }
+
+    /* print out P state information */
+    if ( pinfo )
+    {
+        int max_px_num = 0;
+        struct xc_px_stat pxstatinfo, *pxstat = &pxstatinfo;
+
+        for ( i = 0; i < physinfo.nr_cpus; i++ )
+        {
+            ret = xc_pm_get_max_px(xc_fd, i, &max_px_num);
+            if ( ret ) {
+                if ( errno == ENODEV )
+                    printf("Xen cpufreq is not enabled!\n");
+                else
+                    fprintf(stderr, "failed to get max P-state\n");
+
+                break;
+            }
+
+            pxstat->trans_pt = malloc(max_px_num * max_px_num * sizeof(uint64_t));
+            if ( !pxstat->trans_pt )
+            {
+                fprintf(stderr, "failed to malloc for P-states transition table\n");
+                break;
+            }
+            pxstat->pt = malloc(max_px_num * sizeof(struct xc_px_val));
+            if ( !pxstat->pt )
+            {
+                fprintf(stderr, "failed to malloc for P-states table\n");
+                free(pxstat->pt);
+                break;
+            }
+
+            ret = xc_pm_get_pxstat(xc_fd, 0, pxstat);
+            if( ret ) {
+                fprintf(stderr, "failed to get P-states statistics information\n");
+                free(pxstat->trans_pt);
+                free(pxstat->pt);
+                break;
+            }
+
+            printf("cpu id               : %d\n", i);
+            printf("total P-states       : %d\n", pxstat->total);
+            printf("usable P-states      : %d\n", pxstat->usable);
+            printf("current frequency    : %"PRIu64" MHz\n", pxstat->pt[pxstat->cur].freq);
+            for ( j = 0; j < pxstat->total; j++ )
+            {
+                if ( pxstat->cur == j )
+                    printf("*P%d", j);
+                else
+                    printf("P%d ", j);
+                printf("                  : freq       [%04"PRIu64" MHz]\n", pxstat->pt[j].freq);
+                printf("                       transition [%020"PRIu64"]\n", pxstat->pt[j].count);
+                printf("                       residency  [%020"PRIu64" ms]\n", pxstat->pt[j].residency/1000000UL);
+            }
+
+            free(pxstat->trans_pt);
+            free(pxstat->pt);
+
+            printf("\n");
+        }
+    }
+
+    xc_interface_close(xc_fd);
+    return ret;
+}
+