Xen devel - Jul 2011 - [PATCH] xenalyze: Add --report-pcpu option to report physical cpu utilization

Designed to help XenRT (Citrix''s testing infrastructure) to determine
if a given test has utilized all of the available cores.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>

diff -r 1d7a842aecc5 -r 405fc96c0ec2 xenalyze.c
--- a/xenalyze.c	Tue Jul 12 14:14:21 2011 +0200
+++ b/xenalyze.c	Thu Jul 14 12:55:17 2011 +0100
@@ -161,6 +161,7 @@ struct {
         progress:1,
         svm_mode:1,
         summary:1,
+        report_pcpu:1,
         tsc_loop_fatal:1,
         summary_info;
     long long cpu_hz;
@@ -233,6 +234,7 @@ struct {
     .progress = 0,
     .svm_mode = 0,
     .summary = 0,
+    .report_pcpu = 0,
     .tsc_loop_fatal = 0,
     .cpu_hz = DEFAULT_CPU_HZ,
     .default_guest_paging_levels = 2,
@@ -1840,6 +1842,12 @@ struct pcpu_info {
         unsigned buffer_size;
         struct trace_volume total, last_buffer;
     } volume;
+
+    /* Time report */
+    struct {
+        tsc_t tsc;
+        struct cycle_summary idle, running, lost;
+    } time;
 };
 
 void __fill_in_record_info(struct pcpu_info *p);
@@ -6661,6 +6669,18 @@ struct vcpu_data * vcpu_find(int did, in
     return v;
 }
 
+void pcpu_runstate_update(struct pcpu_info *p, tsc_t tsc)
+{
+    if ( p->time.tsc )
+    {
+        if ( p->current->d->did == IDLE_DOMAIN )
+            update_cycles(&p->time.idle, tsc - p->time.tsc);
+        else
+            update_cycles(&p->time.running, tsc - p->time.tsc);
+        p->time.tsc = 0;
+    }
+}
+
 void vcpu_prev_update(struct pcpu_info *p, struct vcpu_data *prev,
                       tsc_t tsc, int new_runstate)
 {
@@ -6700,6 +6720,7 @@ void vcpu_prev_update(struct pcpu_info *
     }
 
 set:
+    pcpu_runstate_update(p, tsc);
     p->current = NULL;
     runstate_update(prev, new_runstate, tsc);
 }
@@ -6782,6 +6803,7 @@ void vcpu_next_update(struct pcpu_info *
 
     next->p = p;
     p->current = next;
+    p->time.tsc = tsc;
     p->lost_record.seen_valid_schedule = 1;
 }
 
@@ -6817,6 +6839,7 @@ void vcpu_start(struct pcpu_info *p, str
 
     /* Simulate the time since the first tsc */
     runstate_update(v, RUNSTATE_RUNNING, p->first_tsc);
+    p->time.tsc = p->first_tsc;
     p->current = v;
     v->p = p;
 }
@@ -7839,6 +7862,9 @@ void process_lost_records_end(struct pcp
         if(opt.dump_cooked || opt.dump_all)
             printf("               %s lost_records end ---\n",
                    pcpu_string(p->pid));
+
+        update_cycles(&p->time.lost, ri->tsc -
p->lost_record.tsc);
+
         if(p->lost_record.domain_valid) {
             int did = p->lost_record.did,
                 vid = p->lost_record.vid;
@@ -8001,6 +8027,8 @@ void deactivate_pcpu(struct pcpu_info *p
 {
     if ( p->current )
     {
+        pcpu_runstate_update(p, p->last_tsc);
+
         fprintf(warn, "%s: setting d%dv%d to state LOST\n",
                 __func__, p->current->d->did,
                 p->current->vid);
@@ -8750,6 +8778,27 @@ void summary(void) {
     domain_summary();
 }
 
+void report_pcpu(void) {
+    int i, active=0;
+
+    for(i=0; i<MAX_CPUS; i++)
+    {
+        struct pcpu_info *p = P.pcpu+i;
+        if(!p->summary)
+            continue;
+        printf("pcpu %d\n", i);
+        
+        print_cycle_summary(&p->time.running, " running");
+        print_cycle_summary(&p->time.idle,    "    idle");
+        print_cycle_summary(&p->time.lost,    "    lost");
+
+        if ( p->time.running.count )
+            active++;
+    }
+    printf("Total active cpus: %d\n", active);
+    
+}
+
 void init_pcpus(void) {
     int i=0;
     loff_t offset = 0;
@@ -8818,6 +8867,7 @@ enum {
     /* Summary info */
     OPT_SHOW_DEFAULT_DOMAIN_SUMMARY,
     OPT_SAMPLE_SIZE,
+    OPT_REPORT_PCPU,
     /* Guest info */
     OPT_DEFAULT_GUEST_PAGING_LEVELS,
     OPT_SYMBOL_FILE,
@@ -9238,6 +9288,11 @@ error_t cmd_parser(int key, char *arg, s
         opt.summary_info = 1;
         G.output_defined = 1;
         break;
+    case OPT_REPORT_PCPU:
+        opt.report_pcpu = 1;
+        //opt.summary_info = 1;
+        G.output_defined = 1;
+        break;
         /* Guest info group */
     case OPT_DEFAULT_GUEST_PAGING_LEVELS:
     {
@@ -9532,6 +9587,11 @@ const struct argp_option cmd_opts[] =  {
       .group = OPT_GROUP_SUMMARY,
       .doc = "Output a summary", },
     
+    { .name = "report-pcpu",
+      .key = OPT_REPORT_PCPU,
+      .group = OPT_GROUP_SUMMARY,
+      .doc = "Report utilization for pcpus", },
+    
     /* Guest info */
     { .name = "default-guest-paging-levels",
       .key = OPT_DEFAULT_GUEST_PAGING_LEVELS,
@@ -9621,6 +9681,9 @@ int main(int argc, char *argv[]) {
     if(opt.summary)
         summary();
 
+    if(opt.report_pcpu)
+        report_pcpu();
+
     if(opt.progress)
         progress_finish();
               

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