woj/nsjail
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cpu: even better LOG_Ds

Browse Source
This commit is contained in:
Robert Swiecki 2022-08-05 19:15:18 +02:00
parent a33f3a81ca
commit 0d292e7be7
1 changed files with 20 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
cpu.cc
View File

@ -35,11 +35,13 @@
namespace cpu {
static std::string listCpusInSet(cpu_set_t* mask) {
std::string ret = "[ ";
std::string ret = "[";
for (size_t i = 0; i < CPU_SETSIZE; i++) {
if (CPU_ISSET(i, mask)) {
if (ret.length() != 1) {
ret.append(",");
}
ret.append(std::to_string(i));
ret.append(" ");
}
}
ret.append("]");
@ -55,24 +57,25 @@ static size_t getNthOnlineCpu(cpu_set_t* mask, size_t n) {
j++;
}
}
LOG_F("No CPU #%zu found, yet there should be %zu left", n, (size_t)CPU_COUNT(mask));
LOG_F("No CPU #%zu found, yet there should be %zu left in the mask %s", n,
(size_t)CPU_COUNT(mask), listCpusInSet(mask).c_str());
return 0;
}
static void setRandomCpu(cpu_set_t* original_mask, cpu_set_t* new_mask) {
size_t cpus_left = CPU_COUNT(original_mask);
static void setRandomCpu(cpu_set_t* orig_mask, cpu_set_t* new_mask) {
size_t cpus_left = CPU_COUNT(orig_mask);
if (cpus_left == 0) {
LOG_F("There are no more CPUs left to use, and there should be at least 1 left");
}
size_t n = util::rnd64() % cpus_left;
n = getNthOnlineCpu(original_mask, n);
LOG_D(
"Setting allowed CPU#:%zu from the set of %s", n, listCpusInSet(original_mask).c_str());
n = getNthOnlineCpu(orig_mask, n);
CPU_SET(n, new_mask);
CPU_CLR(n, original_mask);
LOG_D("Updating allowed CPU#:%zu from the set of %s (size=%zu), new mask %s (size=%zu)", n,
listCpusInSet(orig_mask).c_str(), (size_t)CPU_COUNT(orig_mask),
listCpusInSet(new_mask).c_str(), (size_t)CPU_COUNT(new_mask));
CPU_CLR(n, orig_mask);
}
bool initCpu(nsjconf_t* nsjconf) {
@ -81,19 +84,19 @@ bool initCpu(nsjconf_t* nsjconf) {
return true;
}
std::unique_ptr<cpu_set_t> original_mask(new cpu_set_t);
if (!original_mask) {
std::unique_ptr<cpu_set_t> orig_mask(new cpu_set_t);
if (!orig_mask) {
PLOG_W("Failure allocating cpu_set_t");
return false;
}
if (sched_getaffinity(0, CPU_ALLOC_SIZE(CPU_SETSIZE), original_mask.get()) == -1) {
if (sched_getaffinity(0, CPU_ALLOC_SIZE(CPU_SETSIZE), orig_mask.get()) == -1) {
PLOG_W("sched_getaffinity(0, mask_size=%zu)", (size_t)CPU_ALLOC_SIZE(CPU_SETSIZE));
return false;
}
size_t available_cpus = CPU_COUNT(original_mask.get());
size_t available_cpus = CPU_COUNT(orig_mask.get());
LOG_D("Original CPU set: %s, with %zu allowed CPUs",
listCpusInSet(original_mask.get()).c_str(), available_cpus);
LOG_D("Original CPU set: %s, with %zu allowed CPUs", listCpusInSet(orig_mask.get()).c_str(),
available_cpus);
if (nsjconf->max_cpus > available_cpus) {
LOG_W(
@ -114,7 +117,7 @@ bool initCpu(nsjconf_t* nsjconf) {
CPU_ZERO(new_mask.get());
for (size_t i = 0; i < nsjconf->max_cpus; i++) {
setRandomCpu(original_mask.get(), new_mask.get());
setRandomCpu(orig_mask.get(), new_mask.get());
}
LOG_D("Setting new CPU mask: %s with %zu allowed CPUs",