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PMCTrack: an OS-oriented performance monitoring tool for Linux

Home Page: https://pmctrack-linux.github.io/

License: GNU General Public License v2.0

Shell 1.54% Makefile 1.01% C 80.42% C++ 3.08% Python 13.95%

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pmctrack's Issues

ftrace - set filter for finish_task_switch failed. error code -22

I successfully build on kernel 5.15.30-051530-generic but it fails on insod module. dmesg when checking the info it says
[49232.363857] ftrace - set filter for finish_task_switch failed. error code -22

if the kernel version I use is 5.15.0,tool is v.2.0,whether I need to do patching to the kernel?

What is the `metric_id` in `pmcs_get_current_metric_value`

I want to measure the LLC misses at kernel level. I see you mention to use int pmcs_get_current_metric_value( struct task_struct* task, int metric_id, uint64_t* value ) function after setting prof_enabled to 1 in tast_struct. But I can't find valid values for metric_id.

PMCTrack for Odroid Smart Power

Hi,
Is there any documentation of how to get energy/power samples periodically from an Odroid Smart Power2 board using pmctrack?
Thank you,
Anwesha

patch for odroid xu4 linux kernel 4.9.y

Is there a patch of linux kernel 4.9.y for odroid xu4?

How to export virtual counters from monitoring module

I have written a monitoring module which periodically reads LLC misses and cycles, and computes a first metric, i.e. rate. I also have a second metric which is only the value of LLC misses counted. I can successfully use these values in my custom scheduler, which is great ! Then I also wrote a multi-threaded user-space application which uses libpmctrack to count the LLC misses, as in the example in test/test_libpmctrack/basic-test-libpmctrack. If the dummy monitoring module is active I can read some values, however if I activate my monitoring module by echoing the respective index in /proc/pmc/mm_manager I do not read any value and the libpmctrack functions failed in trying to read /proc/pmc/config file. This should happen because I haven't exported the counters as virtual counters. Looking at the dummy monitoring module and at the ipc_sampling module, I added a callback mymodule_counter_usage(), which sets the following fields in the usage structure:

usage->hwpmc_mask = 0x0;
usage->nr_virtual_counters = 1;
usage->nr_experiments = 1;
usage->vcounter_desc[0] = "LLC miss count"

Also I added the following lines in mymodule_on_new_sample() callback to update the virtual counters:
if ((prof->virt_counter_mask & 0x1)) { sample->virt_mask |= 0x1; sample->nr_virt_counts++; sample->virtual_counts[0] = llc_data->llc_misses; }

In this way I can get some values, but I am not sure what I am actually reading as well as I would like to know more on how to properly export the counters and therefore be able to gather counter values from user applications with libpmctrack that are running on a system which uses at the same time my monitoring module in its scheduler.

Thank you in advance for you help and for pmctrack !

Error when setting up PMCTrack on XU3

Hi. When I was following the guide to patch the kernel in the xu3, I came across the following error.
The error states that the following patch was rejected.
Is this something I should be concerned about?

==============================================================

--- arch/arm/boot/dts/exynos5422_evt0.dtsi
+++ arch/arm/boot/dts/exynos5422_evt0.dtsi
@@ -91,6 +91,17 @@
                };
        };

+       arm-pmu {
+                       compatible = "arm,cortex-a15-pmu";
+                       interrupt-parent = <&combiner>;
+                       interrupts = <1 2>, <7 0>, <16 6>, <19 2>;
+       /*
+                       compatible = "arm,cortex-a7-pmu";
+                       interrupt-parent = <&gic>;
+                       interrupts = <0 192 4>, <0 193 4>, <0 194 4>, <0 195 4>;
+       */
+       };
+
        watchdog@10020000 {
                compatible = "samsung,s3c2410-wdt";
                reg = <0x101D0000 0x100>;

==============================================================

how to generate MRC curve

Hi. Can PMCtrack generate MRC curve of SPEC CPU2017?
I have equppied CMT, but I do not kown what the correct command I should input.
I first bind one benchmark on core 2, and here are the "htop" shows:

Then I input commands as follows:

What the correct command is? Please help me! Thanks!

Obtaining zeroes when capturing pmc

Hi,

I am using XU3 with PMCTrack. I followed your guide on getting PMCTrack on the XU3.
Mostly it works, except for a small error during patching where heap #1 was not successful.

However, everything else worked and compiled.
Early test seem to point that pmctrack works but when I start using larger benchmark applications (e.g. parboil) I start getting zeroes in my data. (see example below)

I have tried setting the mm_manager to 1, but i get an error and I found a post in odroid forum that advises to set it to 0.

I hope someone can advise me what I am doing wrong.
Or better still have a working image for XU3.
I would like to obtain performance counters and energy reading of an application for my research work and pmctrack+odroid-xu3 seem to be my best bet.

odroid@odroid:~/PB/parboil$ pmctrack -T 1 -c instr,cycles,llc_misses ./parboil r un cutcp base small
[Event-to-counter mappings]
pmc1=instr
pmc2=cycles
pmc3=llc_misses
[Event counts]
nsample pid event pmc1 pmc2 pmc3
Parboil parallel benchmark suite, version 0.2

read 5943 atoms from file '/home/odroid/PB/parboil/datasets/cutcp/small/input/wa tbox.sl40.pqr'
extent of domain is:
minimum -19.998 -19.941 -19.961
maximum 19.974 20 19.974
padding domain by 0.5 Angstroms
domain lengths are 40.972 by 40.941 by 40.935

  1   4158       tick      45426348      68833709         78206
  2   4158       tick             0             0             0
  3   4158       tick             0             0             0
  4   4158       tick             0             0             0
  5   4158       tick             0             0             0
  6   4158       tick             0             0             0
  7   4158       tick             0             0             0
  8   4158       tick             0             0             0
  9   4158       tick             0             0             0
 10   4158       tick             0             0             0
 11   4158       tick             0             0             0
 12   4158       tick             0             0             0
 13   4158       tick             0             0             0
 14   4158       tick             0             0             0
 15   4158       tick             0             0             0
 16   4158       tick             0             0             0
 17   4158       tick             0             0             0
 18   4158       tick             0             0             0
 19   4158       tick             0             0             0
 20   4158       tick             0             0             0
 21   4158       tick             0             0             0
 22   4158       tick             0             0             0
 23   4158       tick             0             0             0
 24   4158       tick             0             0             0
 25   4158       tick             0             0             0
 26   4158       tick             0             0             0
 27   4158       tick             0             0             0
 28   4158       tick             0             0             0
 29   4158       tick             0             0             0
 30   4158       tick             0             0             0
 31   4158       tick             0             0             0
 32   4158       tick             0             0             0
 33   4158       tick             0             0             0

IO : 0.035814
Compute : 32.895776
Timer Wall Time: 32.931599
Pass
34 4158 migration 173104 654628 2465
35 4158 exit 4209084 13617505 58913
odroid@odroid:~/PB/parboil$

Monitoring multiple application concurrently

Hi,

Would it be possible to concurrently obtain 5 applications pmc separately?
E.g. I have 5 applications that needs to run concurrently, but I need to obtain the pmc counts for each application.

Patch for kernel 4.17-x86

Hi,

Is there any patch for kernel v4.17-x86? How can I use PMCTrack on this kernel?

Thanks

recording more than 4 event counters

Hi, I am trying to get stats for multiple counters. I am getting the following in the output file:

[Event-to-counter mappings]

pmc1=instr(0),llc_misses(1)

pmc2=cycles(0),bus_accesses(1)

pmc3=l2_cache_accesses(0)

pmc4=l1_data_accesses(0)

[Event counts]

nsample    cpu coretype expid      event          pmc1          pmc2          pmc3          pmc4

      1      0        0     0       tick         16201        122948          2471          5695 

      2      1        0     0       tick        897005       4291915         11347        206329 

      3      2        0     0       tick         10178         83281          1693          4096 

      4      3        0     0       tick       1626577       5142808         69491        685774 

      5      4        1     0       tick         17712         67290          2093          8100 

      6      5        1     0       tick           115          1929            78            44 

      7      6        1     0       tick         46568        167465          4011         17111 

      8      7        1     0       tick             0             0             0             0 

      9      0        0     1       tick             0             0             -             - 

     10      1        0     1       tick          3331         82381             -             - 

     11      2        0     1       tick             0             0             -             - 

     12      3        0     1       tick          4179         18810             -             - 

     13      4        1     1       tick           106           493             -             - 

     14      5        1     1       tick             0             0             -             - 

     15      6        1     1       tick           486          3060             -             - 

     16      7        1     1       tick             0             0             -             - 

     17      0        0     0       tick             0             0             0             0 

     18      1        0     0       tick       2372160      10162903         50591        540864 

     19      2        0     0       tick             0             0             0             0 

     20      3        0     0       tick        646372       1332981         15585        228872 

     21      4        1     0       tick         50142         69657          1440         20128 

     22      5        1     0       tick             0             0             0             0 

     23      6        1     0       tick        189017        381921         14571         55095 

     24      7        1     0       tick             0             0             0             0 

     25      0        0     1       tick             0             0             -             - 

     26      1        0     1       tick          1239        499002             -             - 

     27      2        0     1       tick             0             0             -             - 

     28      3        0     1       tick             0             0             -             - 

     29      4        1     1       tick            45           208             -             - 

     30      5        1     1       tick             0             0             -             - 

     31      6        1     1       tick           757          4199             -             - 

     32      7        1     1       tick             0             0             -             -

Does this mean that I can not record more than 4 counters at one particular instant?
Or expid 0 and 1 both are recorded at the same time but displayed separately? what does expid represent?
Can you please explain how to interpret this output?
Thank you.

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