options

Stylizer

engine_NEON1M11-0001_o1_m52_ifort_full_bunch/engine_NEON1M11-0001_o1_m52_ifx_full_bunch/

[ 2.78 / 3 ] Architecture specific option -xCORE is used

[ 0 / 3 ] Compilation of some functions is not optimized for the target processor

Architecture specific options are needed to produce efficient code for a specific processor ( -x(target) or -ax(target) ).

[ 2.78 / 3 ] Most of time spent in analyzed modules comes from functions compiled with -g and -fno-omit-frame-pointer

-g option gives access to debugging informations, such are source locations. -fno-omit-frame-pointer improve the accuracy of callchains found during the application profiling.

[ 0 / 3 ] Most of time spent in analyzed modules comes from functions without compilation information

Functions without compilation information (typically not compiled with -g) cumulate 100.00% of the time spent in analyzed modules. Check that -g is present. Remark: if -g is indeed used, this can also be due to some compiler built-in functions (typically math) or statically linked libraries. This warning can be ignored in that case.

[ 2 / 2 ] Application is correctly profiled ("Others" category represents 0.70 % of the execution time)

To have a representative profiling, it is advised that the category "Others" represents less than 20% of the execution time in order to analyze as much as possible of the user code

[ 2 / 2 ] Application is correctly profiled ("Others" category represents 0.70 % of the execution time)

To have a representative profiling, it is advised that the category "Others" represents less than 20% of the execution time in order to analyze as much as possible of the user code

[ 2.80 / 3 ] Optimization level option is correctly used

[ 0 / 3 ] Some functions are compiled with a low optimization level (O0 or O1)

To have better performances, it is advised to help the compiler by using a proper optimization level (-O2 of higher). Warning, depending on compilers, faster optimization levels can decrease numeric accuracy.

[ 4 / 4 ] Application profile is long enough (3139.05 s)

To have good quality measurements, it is advised that the application profiling time is greater than 10 seconds.

[ 4 / 4 ] Application profile is long enough (1879.77 s)

To have good quality measurements, it is advised that the application profiling time is greater than 10 seconds.

Strategizer

engine_NEON1M11-0001_o1_m52_ifort_full_bunch/engine_NEON1M11-0001_o1_m52_ifx_full_bunch/

[ 4 / 4 ] Loop profile is not flat

At least one loop coverage is greater than 4% (10.02%), representing an hotspot for the application

[ 4 / 4 ] Loop profile is not flat

At least one loop coverage is greater than 4% (10.18%), representing an hotspot for the application

[ 2 / 2 ] Less than 10% (0.00%) is spend in BLAS2 operations

BLAS2 calls usually could make a poor cache usage and could benefit from inlining.

[ 2 / 2 ] Less than 10% (0.00%) is spend in BLAS2 operations

BLAS2 calls usually could make a poor cache usage and could benefit from inlining.

[ 4 / 4 ] Enough time of the experiment time spent in analyzed innermost loops (77.10%)

If the time spent in analyzed innermost loops is less than 15%, standard innermost loop optimizations such as vectorisation will have a limited impact on application performances.

[ 4 / 4 ] Enough time of the experiment time spent in analyzed innermost loops (77.71%)

If the time spent in analyzed innermost loops is less than 15%, standard innermost loop optimizations such as vectorisation will have a limited impact on application performances.

[ 3 / 3 ] Less than 10% (0.00%) is spend in BLAS1 operations

It could be more efficient to inline by hand BLAS1 operations

[ 3 / 3 ] Less than 10% (0.00%) is spend in BLAS1 operations

It could be more efficient to inline by hand BLAS1 operations

[ 2 / 2 ] Less than 10% (0.00%) is spend in Libm/SVML (special functions)

[ 2 / 2 ] Less than 10% (0.00%) is spend in Libm/SVML (special functions)

[ 4 / 4 ] Enough time of the experiment time spent in analyzed loops (80.72%)

If the time spent in analyzed loops is less than 30%, standard loop optimizations will have a limited impact on application performances.

[ 4 / 4 ] Enough time of the experiment time spent in analyzed loops (82.14%)

If the time spent in analyzed loops is less than 30%, standard loop optimizations will have a limited impact on application performances.

[ 3 / 3 ] Cumulative Outermost/In between loops coverage (3.63%) lower than cumulative innermost loop coverage (77.10%)

Having cumulative Outermost/In between loops coverage greater than cumulative innermost loop coverage will make loop optimization more complex

[ 3 / 3 ] Cumulative Outermost/In between loops coverage (4.44%) lower than cumulative innermost loop coverage (77.71%)

Having cumulative Outermost/In between loops coverage greater than cumulative innermost loop coverage will make loop optimization more complex

Optimizer

Analysisr_1r_2
Loop Computation IssuesPresence of expensive FP instructions10
Less than 10% of the FP ADD/SUB/MUL arithmetic operations are performed using FMA66
Presence of a large number of scalar integer instructions55
Control Flow IssuesPresence of 2 to 4 paths22
Presence of more than 4 paths10
Data Access IssuesPresence of constant non-unit stride data access12
Presence of indirect access22
More than 10% of the vector loads instructions are unaligned01
Presence of expensive instructions: scatter/gather01
Presence of special instructions executing on a single port02
More than 20% of the loads are accessing the stack54
Vectorization RoadblocksPresence of 2 to 4 paths22
Presence of more than 4 paths10
Presence of constant non-unit stride data access12
Presence of indirect access22
Out of user code01
Inefficient VectorizationPresence of expensive instructions: scatter/gather01
Presence of special instructions executing on a single port02
Use of masked instructions01
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