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regular filesystems + ZFS

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This commit is contained in:
Jos Dehaes 2021-11-21 21:36:44 +01:00
parent 70d9777908
commit 7c433be4a6
1 changed files with 68 additions and 42 deletions
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110
src/freebsd/btop_collect.cpp
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@ -45,6 +45,7 @@ tab-size = 4
#include <paths.h>
#include <fcntl.h>
#include <unistd.h>
#include <devstat.h>
#include <stdexcept>
#include <cmath>
@ -472,30 +473,82 @@ namespace Mem {
return Shared::totalMem;
}
class dataset {
public:
uint64_t nread;
uint64_t nwritten;
string name;
};
void assign_values(auto& disk, int64_t readBytes, int64_t writeBytes) {
if (disk.io_read.empty())
disk.io_read.push_back(0);
else
disk.io_read.push_back(max((int64_t)0, (readBytes - disk.old_io.at(0))));
disk.old_io.at(0) = readBytes;
while (cmp_greater(disk.io_read.size(), width * 2)) disk.io_read.pop_front();
void collect_disk(unordered_flat_map<string, disk_info> &disks) {
if (disk.io_write.empty())
disk.io_write.push_back(0);
else
disk.io_write.push_back(max((int64_t)0, (writeBytes - disk.old_io.at(1))));
disk.old_io.at(1) = writeBytes;
while (cmp_greater(disk.io_write.size(), width * 2)) disk.io_write.pop_front();
// no io times
if (disk.io_activity.empty())
disk.io_activity.push_back(0);
else
disk.io_activity.push_back(clamp((long)round((double)(disk.io_write.back() + disk.io_read.back()) / (1 << 20)), 0l, 100l));
while (cmp_greater(disk.io_activity.size(), width * 2)) disk.io_activity.pop_front();
}
void collect_disk(unordered_flat_map<string, disk_info> &disks, unordered_flat_map<string, string> &mapping) {
// this bit is for 'regular' mounts
static struct statinfo cur, last;
long double etime = 0;
uint64_t total_bytes_read;
uint64_t total_bytes_write;
static std::unique_ptr<struct devinfo, decltype(std::free)*> curDevInfo (reinterpret_cast<struct devinfo*>(std::calloc(1, sizeof(struct devinfo))), std::free);
static std::unique_ptr<struct devinfo, decltype(std::free)*> lastDevInfo (reinterpret_cast<struct devinfo*>(std::calloc(1, sizeof(struct devinfo))), std::free);
cur.dinfo = curDevInfo.get();
last.dinfo = lastDevInfo.get();
if (devstat_getdevs(NULL, &cur) != -1) {
for (int i = 0; i < cur.dinfo->numdevs; i++) {
auto d = cur.dinfo->devices[i];
string devStatName = "/dev/" + string(d.device_name) + std::to_string(d.unit_number);
for (auto& [ignored, disk] : disks) { // find matching mountpoints - could be multiple as d.device_name is only ada (and d.unit_number is the device number), while the disk.dev is like /dev/ada0s1
if (disk.dev.string().rfind(devStatName, 0) == 0) {
devstat_compute_statistics(&d, NULL, etime, DSM_TOTAL_BYTES_READ, &total_bytes_read, DSM_TOTAL_BYTES_WRITE, &total_bytes_write, DSM_NONE);
assign_values(disk, total_bytes_read, total_bytes_write);
string mountpoint = mapping.at(disk.dev);
Logger::debug("dev " + devStatName + " -> " + mountpoint + " read=" + std::to_string(total_bytes_read) + " write=" + std::to_string(total_bytes_write));
}
}
}
Logger::debug("");
}
// this code is for ZFS mounts
FILE *f = popen("sysctl kstat.zfs.zroot.dataset", "r");
unordered_flat_map<string, dataset> datasets;
if (f) {
size_t len = 512;
char buf[512];
while (not std::feof(f)) {
uint64_t nread, nwritten;
string datasetname;
string datasetname; // this is the zfs volume, like 'zroot/usr/home' -> this maps onto the device we get back from getmntinfo(3)
if (fgets(buf, len, f)) {
char *name = std::strtok(buf, ": \n");
char *value = std::strtok(NULL, ": \n");
if (string(name).find("dataset_name") != string::npos) {
// create entry if datasetname matches with anything in mapping
// relies on the fact that the dataset name is last value in the list
// alternatively you could parse the objset-0x... when this changes, you have a new entry
datasetname = string(value);
dataset d{nread, nwritten, datasetname};
datasets[datasetname] = d; //relies on the fact that the dataset name is last value in the list -- alternatively you could parse the objset-0x... when this changes, you have a new entry
Logger::debug("created " + d.name + "(" + std::to_string(d.nread) + "," + std::to_string(d.nwritten) + ")");
if (mapping.contains(datasetname)) {
string mountpoint = mapping.at(datasetname);
if (disks.contains(mountpoint)) {
auto& disk = disks.at(mountpoint);
assign_values(disk, nread, nwritten);
}
}
Logger::debug("created " + datasetname + " with (" + std::to_string(nread) + "," + std::to_string(nwritten) + ")");
} else if (string(name).find("nread") != string::npos) {
nread = atoll(value);
} else if (string(name).find("nwritten") != string::npos) {
@ -506,34 +559,6 @@ namespace Mem {
std::fclose(f);
}
for (auto &[mountpoint, disk] : disks) {
if (datasets.contains(disk.dev)) {
Logger::debug("checking dev " + string(disk.dev));
int64_t readBytes = datasets[disk.dev].nread;
if (disk.io_read.empty())
disk.io_read.push_back(0);
else
disk.io_read.push_back(max((int64_t)0, (readBytes - disk.old_io.at(0))));
disk.old_io.at(0) = readBytes;
while (cmp_greater(disk.io_read.size(), width * 2)) disk.io_read.pop_front();
int64_t writeBytes = datasets[disk.dev].nwritten;
if (disk.io_write.empty())
disk.io_write.push_back(0);
else
disk.io_write.push_back(max((int64_t)0, (writeBytes - disk.old_io.at(1))));
disk.old_io.at(1) = writeBytes;
while (cmp_greater(disk.io_write.size(), width * 2)) disk.io_write.pop_front();
// no io times
if (disk.io_activity.empty())
disk.io_activity.push_back(0);
else
disk.io_activity.push_back(clamp((long)round((double)(disk.io_write.back() + disk.io_read.back()) / (1 << 20)), 0l, 100l));
while (cmp_greater(disk.io_activity.size(), width * 2)) disk.io_activity.pop_front();
}
}
}
auto collect(const bool no_update) -> mem_info & {
@ -613,7 +638,8 @@ namespace Mem {
found.reserve(last_found.size());
for (int i = 0; i < count; i++) {
auto fstype = string(stfs[i].f_fstypename);
if (fstype == "autofs" || fstype == "devfs" || fstype == "linprocfs" || fstype == "procfs" || fstype == "tmpfs" || fstype == "linsysfs") {
if (fstype == "autofs" || fstype == "devfs" || fstype == "linprocfs" || fstype == "procfs" || fstype == "tmpfs" || fstype == "linsysfs" ||
fstype == "devfs" || fstype == "fdesckfs") {
// in memory filesystems -> not useful to show
continue;
}
@ -697,7 +723,7 @@ namespace Mem {
mem.disks_order.push_back(name);
disk_ios = 0;
collect_disk(disks);
collect_disk(disks, mapping);
old_uptime = uptime;
}