[xen staging] xenperf: omit meaningless trailing zeroes from output

[patchbot@xxxxxxx]

commit af0c5430a82c77432729d61c9b409dd32c477b20
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Jan 4 10:21:12 2022 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Jan 4 10:21:12 2022 +0100

    xenperf: omit meaningless trailing zeroes from output
    
    There's no point producing a long chain of zeroes when the previously
    calculated total value was zero. To guard against mistakenly skipping
    non-zero individual fields, widen "sum" to "unsigned long long".
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/misc/xenperf.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/misc/xenperf.c b/tools/misc/xenperf.c
index a74fd85b71..6e5f8675d4 100644
--- a/tools/misc/xenperf.c
+++ b/tools/misc/xenperf.c
@@ -86,7 +86,7 @@ int main(int argc, char *argv[])
     DECLARE_HYPERCALL_BUFFER(xc_perfc_val_t, pcv);
     xc_perfc_val_t  *val;
     int num_desc, num_val;
-    unsigned int    sum, reset = 0, full = 0, pretty = 0;
+    unsigned int     reset = 0, full = 0, pretty = 0;
     char hypercall_name[36];
 
     if ( argc > 1 )
@@ -168,14 +168,15 @@ int main(int argc, char *argv[])
     val = pcv;
     for ( i = 0; i < num_desc; i++ )
     {
+        unsigned long long sum = 0;
+
         printf ("%-35s ", pcd[i].name);
         
-        sum = 0;
         for ( j = 0; j < pcd[i].nr_vals; j++ )
             sum += val[j];
-        printf ("T=%10u ", (unsigned int)sum);
+        printf("T=%10llu ", sum);
 
-        if ( full || (pcd[i].nr_vals <= 4) )
+        if ( sum && (full || (pcd[i].nr_vals <= 4)) )
         {
             if ( pretty && (strcmp(pcd[i].name, "hypercalls") == 0) )
             {
--
generated by git-patchbot for /home/xen/git/xen.git#staging