[Xen-devel] [PATCH] [xentop] fix abnormal value cpu(%) when domain shutdown.

[Atsushi SAKAI <sakaia@xxxxxxxxxxxxxx>]

Hi,

  This patch intends to fix the xentop cpu(%).
If we test multiple domain create/shutdown many times.
sometimes abnormal values of cpu(%) are appeared.
This is because shutdown domain remove failure.
(in other words, memory corruption of struct )
This corruption makes abnormal cpu(%) values are shown xentop
sometimes.

Signed-off-by: Atsushi SAKAI <sakaia@xxxxxxxxxxxxxx>

===example of problem===

      NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) 
VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSID
  Domain-0 -----r        332   0.7     988128   11.8    1048576      
12.5     4    0        0        0    0        0        0        0    0
PVdomain.1 -----r        101  100.5     988160   11.8    1048576      
12.5     4    0        0        0    1        0        0        0    0
PVdomain.2 -----r        149  200.4     988160   11.8    1048576      
12.5     4    0        0        0    1        0       12        0    0    
temp.1 -----r         35  100.5     463872    5.5     524288       6.3     4  
  0        0        0    1        0        0        0    0   
temp.2 -----r         19  200.4     463872    5.5     524288       6.3     4  
  0        0        0    1        0       12        0    0      
      NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) 
VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSID
  Domain-0 -----r        333  26.7     988128   11.8    1048576      12.5     
4    0        0        0    0        0        0        0    0
======Problem event
***PVdomain.1 d-----        103 529379705092.7         16    0.0    1048576   
   12.5     4    0        0        0    1        0       12        0    0
======Problem event
PVdomain.2 -----r        156  200.9     988160   11.8    1048576      12.5    
 4    0        0        0    0        0        0        0    0    
temp.1 -----r         39  101.4     463872    5.5     524288       6.3     4  
  0        0        0    1        0        0        0    0      
NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) VCPUS 
NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSID
  Domain-0 -----r        334   33.7     988128   11.8    1048576      12.5    
 4    0        0        0    0        0        0        0    0
PVdomain.2 -----r        162 1890.8     988160   11.8    1048576      12.5    
 4    0        0        0    1        0       12        0    0    
temp.1 -----r         42  100.8     463872    5.5     524288       6.3     4  
  0        0        0    1        0        0        0    0
temp.2 -----r         32    0.0     463872    5.5     524288       6.3     
4    0        0        0    1        0       12        0    0



Thanks
Atsushi SAKAI

Attachment: fix_xentop_abnomal_cpu_pct.patch
Description: Binary data

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