HP Caliper 5.3 User Guide (5900-1558, February 2011)

• Function
• Source statement
• Instruction
Table 22 Information in dtlb Measurement Reports
DescriptionColumn
Percent of the total for <metric> attributable to a given program object. The <metric> is the same
as the <metric> HP Caliper uses for sorting, except when the sort metric is address, in which case
sampled misses is used.
% Total <metric>
Running sum of the percent of total for <metric> accounted for by the given program object and
those listed above it.
Cumulat % of
Total
Total number of sampled data TLB misses attributed to the given program object.Sampled DTLB
Misses
Number of sampled data TLB misses that hit the L2 data TLB for the given program object.DTLB L2 Fills
Number of sampled data TLB misses that were handled by the hardware page walker (HPW) for
the given program object.
DTLB HPW Fills
Number of sampled data TLB misses that were handled by software for the given program object.DTLB Soft Fills
Percent of sampled data TLB misses that hit the L2 data TLB for the given program object.% DTLB L2 Fill
Percent of sampled data TLB misses that were handled by the hardware page table walker (HPW)
for the given program object.
% DTLB HPW Fill
Percent of sampled data TLB misses that were handled by software for the given program object.% DTLB Soft Fill
Kernel Thread ID suffixed with the the name of the routine that the thread will execute once it is
created.
Kernel Thread
Identification
Number.
Shared library or the main executable.Load Module
Routine from your application.Function
Source file associated with a function.File
The column contains one of these:
• A source-code line number for rows showing statements
• An instruction slot number for rows showing instructions not on a bundle boundary
• A source-code column number followed by an offset from the beginning address of a function
for rows showing instructions on a bundle boundary
Column and line numbers are preceded by “~” when they are approximate due to optimization.
Line |
Slot |
Col,Offset
The column contains either a source statement, preceded by “>”, or a disassembled instruction.
Statements that are out of order due to optimization are preceded by “*>”.
>Statement |
Instruction
How Data TLB Metrics Are Obtained
HP Caliper obtains L1 data TLB metrics from the processor's performance monitoring unit (PMU).
Exact counts are obtained from the PMU's set of performance monitor configuration
(PMC)/performance monitor data (PMD) register pairs. Sampled data TLB metrics are obtained
from the PMU's data event address register (D-EAR).
HP Caliper takes samples every Nth data TLB miss, where N is defined in the dtlb measurement
configuration file in the HP Caliper home directory config subdirectory. At each sample point,
HP Caliper records both the instruction that resulted in an L1 data TLB miss and the level of the TLB
196 Descriptions of Measurement Reports