| orig_default | gcc_default | armclang_6 | gcc_5 |
|---|---|---|---|
[ 3 / 3 ] Host configuration allows retrieval of all necessary metrics. | [ 3 / 3 ] Host configuration allows retrieval of all necessary metrics. | [ 3 / 3 ] Host configuration allows retrieval of all necessary metrics. | [ 3 / 3 ] Host configuration allows retrieval of all necessary metrics. |
[ 3 / 3 ] Most of time spent in analyzed modules comes from functions with source/debug info -g option gives access to debugging informations, such are source locations. | [ 3 / 3 ] Most of time spent in analyzed modules comes from functions with source/debug info -g option gives access to debugging informations, such are source locations. | [ 3 / 3 ] Most of time spent in analyzed modules comes from functions with source/debug info -g option gives access to debugging informations, such are source locations. | [ 3 / 3 ] Most of time spent in analyzed modules comes from functions with source/debug info -g option gives access to debugging informations, such are source locations. |
[ 0 / 3 ] Most of time spent in analyzed modules comes from functions without compilation options informations Functions without compilation options information cumulate 97.25% of the time spent in analyzed modules. For exec, check that both -g and -frecord-command-line are present. Remark: if such options are 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. | [ 3 / 3 ] Most of time spent in analyzed modules comes from functions with compilation options informations and -fno-omit-frame-pointer is present -fno-omit-frame-pointer improves the accuracy of callchains found during the application profiling. | [ 0 / 3 ] Most of time spent in analyzed modules comes from functions without compilation options informations Functions without compilation options information cumulate 97.33% of the time spent in analyzed modules. For exec, check that both -g and -frecord-command-line are present. Remark: if such options are 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. | [ 3 / 3 ] Most of time spent in analyzed modules comes from functions with compilation options informations and -fno-omit-frame-pointer is present -fno-omit-frame-pointer improves the accuracy of callchains found during the application profiling. |
[ 2 / 2 ] Application is correctly profiled ("Others" category represents 0.00 % 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 0.00 % 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 0.00 % 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 0.00 % 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 |
[ 0 / 3 ] Optimization level is unknown for some functions (compilation options info are not available) 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. | [ 3 / 3 ] Optimization level option is correctly used | [ 0 / 3 ] Optimization level is unknown for some functions (compilation options info are not available) 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. | [ 3 / 3 ] Optimization level option is correctly used |
[ 0 / 3 ] Architecture specific options are unknown for some functions (compilation options info are not available) Architecture specific options are needed to produce efficient code for a specific processor ( -mcpu=native ). | [ 3 / 3 ] Architecture specific option -mcpu is used | [ 0 / 3 ] Architecture specific options are unknown for some functions (compilation options info are not available) Architecture specific options are needed to produce efficient code for a specific processor ( -mcpu=native ). | [ 3 / 3 ] Architecture specific option -mcpu is used |
[ 4 / 4 ] Application profile is long enough (136.59 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 (132.62 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 (136.40 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 (130.90 s) To have good quality measurements, it is advised that the application profiling time is greater than 10 seconds. |
Not available for this run | [ 0 / 0 ] Fastmath not used Consider to add ffast-math to compilation flags (or replace -O3 with -Ofast) to unlock potential extra speedup by relaxing floating-point computation consistency. Warning: floating-point accuracy may be reduced and the compliance to IEEE/ISO rules/specifications for math functions will be relaxed, typically 'errno' will no longer be set after calling some math functions. | Not available for this run | Not available for this run |
[ 1 / 1 ] Lstopo present. The Topology lstopo report will be generated. | [ 1 / 1 ] Lstopo present. The Topology lstopo report will be generated. | [ 1 / 1 ] Lstopo present. The Topology lstopo report will be generated. | [ 1 / 1 ] Lstopo present. The Topology lstopo report will be generated. |
| orig_default | gcc_default | armclang_6 | gcc_5 |
|---|---|---|---|
[ 4 / 4 ] CPU activity is good CPU cores are active 99.85% of time | [ 4 / 4 ] CPU activity is good CPU cores are active 98.91% of time | [ 4 / 4 ] CPU activity is good CPU cores are active 99.85% of time | [ 4 / 4 ] CPU activity is good CPU cores are active 98.90% of time |
[ 4 / 4 ] Affinity is good (99.95%) Threads are not migrating to CPU cores: probably successfully pinned | [ 4 / 4 ] Affinity is good (99.92%) Threads are not migrating to CPU cores: probably successfully pinned | [ 4 / 4 ] Affinity is good (99.95%) Threads are not migrating to CPU cores: probably successfully pinned | [ 4 / 4 ] Affinity is good (99.92%) Threads are not migrating to CPU cores: probably successfully pinned |
[ 3 / 3 ] Functions mostly use all threads Functions running on a reduced number of threads (typically sequential code) cover less than 10% of application walltime (1.08%) | [ 3 / 3 ] Functions mostly use all threads Functions running on a reduced number of threads (typically sequential code) cover less than 10% of application walltime (0.84%) | [ 3 / 3 ] Functions mostly use all threads Functions running on a reduced number of threads (typically sequential code) cover less than 10% of application walltime (0.86%) | [ 3 / 3 ] Functions mostly use all threads Functions running on a reduced number of threads (typically sequential code) cover less than 10% of application walltime (0.84%) |
[ 3 / 3 ] Cumulative Outermost/In between loops coverage (45.36%) lower than cumulative innermost loop coverage (51.74%) 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 (0.06%) lower than cumulative innermost loop coverage (97.85%) 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 (28.23%) lower than cumulative innermost loop coverage (68.94%) 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 (0.05%) lower than cumulative innermost loop coverage (97.82%) Having cumulative Outermost/In between loops coverage greater than cumulative innermost loop coverage will make loop optimization more complex |
[ 4 / 4 ] Threads activity is good On average, more than 97.43% of observed threads are actually active | [ 4 / 4 ] Threads activity is good On average, more than 97.07% of observed threads are actually active | [ 4 / 4 ] Threads activity is good On average, more than 97.41% of observed threads are actually active | [ 4 / 4 ] Threads activity is good On average, more than 96.93% of observed threads are actually active |
[ 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. | [ 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 (51.74%) 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 (97.85%) 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 (68.94%) 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 (97.82%) 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 | [ 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) | [ 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 ] Loop profile is not flat At least one loop coverage is greater than 4% (7.91%), representing an hotspot for the application | [ 4 / 4 ] Loop profile is not flat At least one loop coverage is greater than 4% (8.00%), representing an hotspot for the application | [ 4 / 4 ] Loop profile is not flat At least one loop coverage is greater than 4% (8.02%), representing an hotspot for the application | [ 4 / 4 ] Loop profile is not flat At least one loop coverage is greater than 4% (8.15%), representing an hotspot for the application |
[ 4 / 4 ] Enough time of the experiment time spent in analyzed loops (97.10%) 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 (97.90%) 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 (97.17%) 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 (97.86%) If the time spent in analyzed loops is less than 30%, standard loop optimizations will have a limited impact on application performances. |
| Analysis | r0 | r1 | r2 | r3 | |
|---|---|---|---|---|---|
| Loop Computation Issues | Presence of expensive FP instructions | 9 | 9 | 9 | 9 |
| Less than 10% of the FP ADD/SUB/MUL arithmetic operations are performed using FMA | 1 | 4 | 2 | 2 | |
| Presence of a large number of scalar integer instructions | 2 | 2 | 2 | 1 | |
| Control Flow Issues | Presence of 2 to 4 paths | 1 | 2 | 1 | 1 |
| Non-innermost loop | 2 | 0 | 1 | 0 | |
| Data Access Issues | Presence of constant non-unit stride data access | 3 | 9 | 3 | 9 |
| Presence of indirect access | 5 | 1 | 8 | 0 | |
| Vectorization Roadblocks | Presence of 2 to 4 paths | 1 | 2 | 1 | 1 |
| Presence of more than 4 paths | 3 | 0 | 1 | 0 | |
| Non-innermost loop | 2 | 0 | 1 | 0 | |
| Presence of constant non-unit stride data access | 3 | 9 | 3 | 9 | |
| Presence of indirect access | 5 | 1 | 8 | 0 | |