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Full Discussion: Profiling results and SMP
Top Forums Programming Profiling results and SMP Post 302904555 by migurus on Wednesday 4th of June 2014 05:16:40 PM
Old 06-04-2014
Profiling results and SMP
The SCO OSR 5.7 system was migrated from older HP DL360 to new DL380 G7. The SMP feature was not activated on older box, it is activated now on this 4 core Xeon.

A s/w we maintain has been copied without any change over to the new box. I noticed that the application profiling does not show any Seconds and Cumulative seconds for our functions.

results from old system:
Code:
 %Time Seconds Cumsecs  #Calls   msec/call  Name
   3.8    0.32    4.21 4464168      0.0001  my_func1
   3.5    0.30    4.51 4315824      0.0001  my_func2
   3.4    0.29    4.80 1973552      0.0001  my_func4

results from new system:
Code:
 %Time Seconds Cumsecs  #Calls   msec/call  Name
   0.0    0.00    0.00 4464168      0.0001  my_func1
   0.0    0.00    0.00 4315824      0.0001  my_func2
   0.0    0.00    0.00 1973552      0.0001  my_func4

One more note: the last line on the prof output in Cumsecs in the old system would show pretty much the time it took to execute, on the new system it shows a number roughly ten times smaller than actual execution time.


It is static COEFF binary built with the same make file with same compiler, nothing changed between old and new environment, except SMP. The system (old and new) is pretty much one user system idle 99.9% of the time.

I guess the SMP feature is the reason for the skewed profiling. Does anybody know about this issue? Any ideas?

Thanks in advance.
 

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LEARN ABOUT DEBIAN

dahdi_hardware

DAHDI_HARDWARE(8)					User Contributed Perl Documentation					 DAHDI_HARDWARE(8)

NAME

       dahdi_hardware - Shows Dahdi hardware devices.

SYNOPSIS

       dahdi_hardware [-v][-x]

OPTIONS

       -v  Verbose ouput - show spans used by each device etc. Currently only implemented for the Xorcom Astribank.

       -x  Show disconnected Astribank unit, if any.

DESCRIPTION

       Show all dahdi hardware devices. Devices are recognized according to lists of PCI and USB IDs in Dahdi::Hardware::PCI.pm and
       Dahdi::Hardware::USB.pm . For PCI it is possible to detect by sub-vendor and sub-product ID as well.

       The first output column is the connector: a bus specific field that shows where this device is.

       The second field shows which driver should handle the device. a "-" sign marks that the device is not yet handled by this driver. A "+"
       sign means that the device is handled by the driver.

       For the Xorcom Astribank (and in the future: for other Dahdi devices) some further information is provided from the driver. Those extra
       lines always begin with spaces.

       Example output:

       Without drivers loaded:

	 usb:001/002	    xpp_usb-	 e4e4:1152 Astribank-multi FPGA-firmware
	 usb:001/003	    xpp_usb-	 e4e4:1152 Astribank-multi FPGA-firmware
	 pci:0000:01:0b.0   wctdm-	 e159:0001 Wildcard TDM400P REV H

       With drivers loaded, without -v:
	 usb:001/002	    xpp_usb+	 e4e4:1152 Astribank-multi FPGA-firmware
	 usb:001/003	    xpp_usb+	 e4e4:1152 Astribank-multi FPGA-firmware
	 pci:0000:01:0b.0   wctdm+	 e159:0001  Wildcard TDM400P REV E/F

       With drivers loaded, with -v:
	 usb:001/002	    xpp_usb+	 e4e4:1152 Astribank-multi FPGA-firmware
	  LABEL=[usb:123] CONNECTOR=usb-0000:00:1d.7-1
		 XBUS-00/XPD-00: FXS	  Span 2
		 XBUS-00/XPD-10: FXS	  Span 3
		 XBUS-00/XPD-20: FXS	  Span 4
		 XBUS-00/XPD-30: FXS	  Span 5
	 usb:001/003	    xpp_usb+	 e4e4:1152 Astribank-multi FPGA-firmware
	  LABEL=[usb:4567] CONNECTOR=usb-0000:00:1d.7-4
		 XBUS-01/XPD-00: FXS	  Span 6 XPP-SYNC
		 XBUS-01/XPD-10: FXO	  Span 7
		 XBUS-01/XPD-20: FXO	  Span 8
		 XBUS-01/XPD-30: FXO	  Span 9
	 pci:0000:01:0b.0   wctdm+	 e159:0001  Wildcard TDM400P REV E/F

perl v5.14.2							    2009-04-20							 DAHDI_HARDWARE(8)
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