HP UX Caliper Software manual Dcache Measurement Report Description

Example 5 Example of a dcache Report for an rx4640 Integrity server

Function Details

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% Total			Avg.	---Latency buckets as % Misses			--
Dcache	Sampled	Dcache	Dcache	L2	--L3	-- ------Memory-------		Line
Latency	Dcache	Latency	Laten.					Slot	>Statement
Cycles	Misses	Cycles	Cycles	7	14	64 150 250 350 450	>	Col,Offset	Instruction

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84.29[a.out::goo, 0x4000af0, liby.c]

541	8989	16.6	92 0 1 5 0 1 0 0								19	Function Totals
------------------------------------------------------------------------------------------
[/home/vm/tmp/liby.c]
(93)	(1719)	(18.5)	91	0	0	6	1	1	0	0	24	>	a[i] += i;
											5,0x0030:0	M	ld8
r10=[r9]
											:1	I_	nop.i
0 ;;
											:2	I_	addp4
r8=r8,r10 ;;
93	1719	18.5	91	0	0	6	1	1	0	0	5,0x0040:0	M	ld4
r9=[r8]
0	0										:1	I_	nop.i
0 ;;
0	0										:2	I_	add
r9=r9,r32 ;;
											5,0x0050:0	M	st4
[r8]=r9
											:1	L
											:2	X	movl

Example 6 shows a portion of an example dcache report for a Superdome Integrity server. Example 6 Example of a dcache Report for a Superdome Integrity Server

Function Details

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% Total

Avg.

---Latency

buckets

as % Misses---

Dcache

Sampled

Dcache

Dcache

L2 --

L3--

loc

loc

1

2

1&2

Line

Latency

Dcache

Latency

Laten.

c2c

mem hop

hop

c2c

Slot

>Statement

Cycles

Misses

Cycles

Cycles

Col,Offset

Instruction

714 64 150 350 650 800 >800

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56.19[caliper::ipack_encode_chain, 0x4000000000335900, ipack.c]

321018	9111771	28.3	23	12	11	8	12	14	10	10	~4518	Function Totals
-------------------------------------------------------------
[/CLO/Components/Caliper/Src/encode/ipack.c]
(262028)	(8464760)	(32.3)	20 22	10		8	9 14	6	11		278 >	instr = instr->next;
0	0										5,0x00e0:0	M_	adds
r8=8,r35 ;;
262028	8464760	32.3	20	22	10	8	9	14	6	11	:1	M	ld8
r35=[r8]
0	0										:2	I	nop.i	0
											5,0x00f0:0	M	nop.m	0
											:1	M	nop.m	0
											:2	B_	br.dptk
{self}+0x920 ;;

Using the --dcache-data-profile Option to Produce a Data Summary

To get a Data Summary output, you need to use the --dcache-data-profileoption. The dcache measurement does not produce the Data Summary by default.

The Data Summary shows a histogram of data accessed by location. Each sample records the data address that is accessed. If a data address belongs to a global variable, the sample is attributed to the global variable. Otherwise, the data address is mapped to a process region such as text, data, heap, stack, and so forth.

If a data address cannot be determined to belong to a global variable or a process region, it is shown as an unknown sample. The data address is appended to the symbol name. An example entry might be *unknown_0x9fffffffbf789378*, where the data address 0x9fffffffbf789378 was a data cache miss, but it was not assigned to any global variable or process region.

An example of Data Summary output is shown below:

dcache Measurement Report Description 191