mirror of
https://github.com/mmueller41/genode.git
synced 2026-01-21 12:32:56 +01:00
Added simple example for using the performance counter syscalls in EalánOS.
This commit is contained in:
Michael Mueller
80
repos/mml/run/hpc_test.run
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80
repos/mml/run/hpc_test.run
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set build_components {
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core init timer app/hpc_test
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}
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source ${genode_dir}/repos/base/run/platform_drv.inc
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append_platform_drv_build_components
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build $build_components
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create_boot_directory
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set config {
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<config>
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<parent-provides>
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<service name="LOG"/>
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<service name="PD"/>
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<service name="CPU"/>
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<service name="ROM"/>
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<service name="RAM"/>
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<service name="IRQ"/>
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<service name="IO_MEM"/>
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<service name="IO_PORT"/>
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<service name="CAP"/>
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<service name="RM"/>
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<service name="SIGNAL"/>
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<service name="TOPO"/>
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</parent-provides>
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<default-route>
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<any-service><parent/><any-child/></any-service>
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</default-route>
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<default caps="200"/>
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<start name="timer">
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<resource name="RAM" quantum="16M"/>
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<provides><service name="Timer"/></provides>
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<route>
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<any-service><parent/><any-child/></any-service>
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</route>
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</start>
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}
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append config {
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<start name="hpc_test1">
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<binary name="hpc_test"/>
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<resource name="RAM" quantum="64M"/>
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<config>
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<vfs> <dir name="dev"> <log/> <inline name="rtc">2022-07-20 14:30</inline> </dir> </vfs>
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<libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/rtc"/>
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</config>
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<route>
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<service name="Timer"><child name="timer"/></service>
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<any-service><parent/><any-child/></any-service>
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</route>
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</start>
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<start name="hpc_test2">
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<binary name="hpc_test"/>
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<resource name="RAM" quantum="64M"/>
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<config>
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<vfs> <dir name="dev"> <log/> <inline name="rtc">2022-07-20 14:30</inline> </dir> </vfs>
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<libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/rtc"/>
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</config>
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<route>
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<service name="Timer"><child name="timer"/></service>
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<any-service><parent/><any-child/></any-service>
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</route>
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</start>
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</config>
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}
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install_config $config
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set boot_modules {
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core init timer vfs.lib.so ld.lib.so posix.lib.so libc.lib.so libm.lib.so stdcxx.lib.so hpc_test
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}
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append_platform_drv_boot_modules
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build_boot_image $boot_modules
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append qemu_args "-nographic "
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run_genode_until forever
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89
repos/mml/src/app/hpc_test/main.cc
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89
repos/mml/src/app/hpc_test/main.cc
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/**
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* @file main.cc
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* @author Michael Müller (michael.mueller@uos.de)
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* @brief Some test for programing hardware performance counters in NOVA
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* @version 0.1
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* @date 2022-12-14
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*
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* @copyright Copyright (c) 2022
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*
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*/
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#include <nova/syscall-generic.h>
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#include <nova/syscalls.h>
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#include <iostream>
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#include <chrono>
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#include <thread>
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#include <x86intrin.h>
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int main(void)
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{
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Nova::mword_t event = 0x26;
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Nova::mword_t mask = 0x00;
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Nova::mword_t flags = 0x70000;
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Nova::uint8_t rc;
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if ((rc = Nova::hpc_ctrl(Nova::HPC_SETUP, 0, 1, event, mask, flags)) != Nova::NOVA_OK) {
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std::cerr << "Failed to setup performance counter 0" << std::endl;
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return -1;
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}
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std::cout << "Counter 0 setup" << std::endl;
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event = 0x60;
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mask = 0xfe;
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if ((rc = Nova::hpc_ctrl(Nova::HPC_SETUP, 1, 1, event, mask, flags)) != Nova::NOVA_OK)
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{
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std::cerr << "Failed to setup performance counter 1, rc = " << static_cast<Nova::uint32_t>(rc) << std::endl;
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return -1;
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}
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event = 0x62;
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mask = 0x1;
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if ((rc = Nova::hpc_ctrl(Nova::HPC_SETUP, 2, 1, event, mask, flags)) != Nova::NOVA_OK)
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{
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std::cerr << "Failed to setup performance counter 2, rc = " << static_cast<Nova::uint32_t>(rc) << std::endl;
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return -1;
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}
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if ((rc = Nova::hpc_start(0, 1)) != Nova::NOVA_OK) {
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std::cerr << "Failed to start counter 0" << std::endl;
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return -2;
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}
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if ((rc = Nova::hpc_start(1, 1)) != Nova::NOVA_OK) {
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std::cerr << "Failed to start counter 0" << std::endl;
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return -2;
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}
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if ((rc = Nova::hpc_start(2, 1)) != Nova::NOVA_OK) {
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std::cerr << "Failed to start counter 0" << std::endl;
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return -2;
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}
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for (;;) {
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std::this_thread::sleep_for(std::chrono::milliseconds(2000));
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Nova::mword_t count = 0;
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_mm_clflush(&count);
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if ((rc = Nova::hpc_read(0, 1, count)) != Nova::NOVA_OK)
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{
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std::cerr << "Failed to read counter 0" << std::endl;
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}
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std::cout << count << " cache line flushes" << std::endl;
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Nova::mword_t latency = 0;
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if ((rc = Nova::hpc_read(2, 1, latency)) != Nova::NOVA_OK)
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{
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std::cerr << "Failed to read counter 1" << std::endl;
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}
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Nova::mword_t l2_requests = 0;
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if ((rc = Nova::hpc_read(1, 1, l2_requests)) != Nova::NOVA_OK)
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{
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std::cerr << "Failed to read counter 1" << std::endl;
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}
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count = (latency * 4) / l2_requests;
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std::cout << "L2 latency:" << count << " cycles" << std::endl;
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}
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return 0;
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}
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5
repos/mml/src/app/hpc_test/target.mk
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5
repos/mml/src/app/hpc_test/target.mk
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@@ -0,0 +1,5 @@
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TARGET = hpc_test
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SRC_CC = trace_pfc.cc
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LIBS += base posix libm libc stdcxx
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CC_OPT += -Wno-error -Wno-permissive -fpermissive -Wno-error=conversion
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105
repos/mml/src/app/hpc_test/trace_pfc.cc
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105
repos/mml/src/app/hpc_test/trace_pfc.cc
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/**
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* @file trace_pfc.cc
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* @author Michael Müller (michael.mueller@uos.de)
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* @brief Tests for Genode wrappers around Performance counter syscalls in NOVA
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* @version 0.1
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* @date 2022-12-15
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*
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* @copyright Copyright (c) 2022
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*
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*/
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#include <base/trace/perf.h>
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#include <iostream>
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#include <chrono>
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#include <thread>
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#include <x86intrin.h>
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using namespace Genode;
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int main(void)
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{
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Trace::Performance_counter::Counter ctr_clflush, ctr_l2_latency, ctr_l2_requests, /*ctr_l3_miss,*/ ctr_l2_prefetch;
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try {
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ctr_clflush = Trace::Performance_counter::alloc_core();
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ctr_l2_latency = Trace::Performance_counter::alloc_core();
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ctr_l2_requests = Trace::Performance_counter::alloc_core();
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ctr_l2_prefetch = Trace::Performance_counter::acquire(Trace::Performance_counter::Type::CORE);
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// ctr_l3_miss = Trace::Performance_counter::alloc_cbo();
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}
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catch (Trace::Pfc_no_avail)
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{
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std::cout << "Unable to allocate performance counters." << std::endl;
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return -1;
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}
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std::cout << "Performance counter allocation successful." << std::endl;
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try {
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Trace::Performance_counter::setup(ctr_clflush, 0x26, 0x00, 0x70000);
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Trace::Performance_counter::setup(ctr_l2_latency, 0x62, 0x01, 0x30000);
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Trace::Performance_counter::setup(ctr_l2_requests, 0x60, 0xfe, 0x30000);
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Trace::Performance_counter::setup(ctr_l2_prefetch, 0xc0, 0x00, 0x30000);
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//Trace::Performance_counter::setup(ctr_l3_miss, 0x6, 0xff, 0x550f000000000000);
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} catch (Trace::Pfc_access_error &e) {
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std::cerr << "PFC access failed. rc=" << e.error_code() << std::endl;
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return -1;
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}
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std::cout << "Performance counters successfully set up." << std::endl;
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try {
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Trace::Performance_counter::start(ctr_clflush);
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Trace::Performance_counter::start(ctr_l2_latency);
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Trace::Performance_counter::start(ctr_l2_requests);
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Trace::Performance_counter::start(ctr_l2_prefetch);
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//Trace::Performance_counter::start(ctr_l3_miss);
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} catch (Trace::Pfc_access_error &e) {
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std::cerr << "PFC access failed. rc=" << e.error_code() << std::endl;
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return -1;
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}
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std::cout << "Performance counters started." << std::endl;
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for (;;) {
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Genode::uint64_t clflushes, latency, requests, /*l3_misses,*/ l2_prefetches;
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clflushes = latency = requests = l2_prefetches = 0;
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std::this_thread::sleep_for(std::chrono::seconds(2));
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_mm_clflush(&clflushes);
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_mm_clflush(&clflushes);
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try {
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clflushes = Trace::Performance_counter::read(ctr_clflush);
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latency = Trace::Performance_counter::read(ctr_l2_latency);
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requests = Trace::Performance_counter::read(ctr_l2_requests);
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l2_prefetches = Trace::Performance_counter::read(ctr_l2_prefetch);
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//l3_misses = Trace::Performance_counter::read(ctr_l3_miss);
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} catch (Trace::Pfc_access_error &e) {
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std::cerr << "PFC access failed. rc=" << e.error_code() << std::endl;
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return 1;
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}
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std::cout << clflushes << " cache line flushes." << std::endl;
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//std::cout << "L2 latency: " << (latency * 4) / requests << " cycles." << std::endl;
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std::cout << l2_prefetches << " L2 prefetch requests." << std::endl;
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/*
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try {
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Trace::Performance_counter::stop(ctr_l2_prefetch);
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Trace::Performance_counter::reset(ctr_l2_prefetch, 0xdeadbeef);
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Trace::Performance_counter::start(ctr_l2_prefetch);
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std::cout << Trace::Performance_counter::read(ctr_l2_prefetch) << " L2 prefetches after context-switch" << std::endl;
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Trace::Performance_counter::stop(ctr_l2_prefetch);
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Trace::Performance_counter::reset(ctr_l2_prefetch, l2_prefetches);
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Trace::Performance_counter::start(ctr_l2_prefetch);
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} catch (Trace::Pfc_access_error &e) {
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std::cerr << "PFC access failed. rc=" << e.error_code() << std::endl;
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}
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*/
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// std::cout << l3_misses << " L3 misses" << std::endl;
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}
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return 0;
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}
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