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Add packet multiplexer

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This commit is contained in:
Joseph Henry 2024-08-18 15:07:18 -07:00
parent 64634c916c
commit 36adae3d82
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GPG key ID: C45B33FF5EBC9344
13 changed files with 236 additions and 22 deletions
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23
osdep/LinuxEthernetTap.cpp
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@ -111,7 +111,6 @@ static void _base32_5_to_8(const uint8_t *in,char *out)
LinuxEthernetTap::LinuxEthernetTap(
const char *homePath,
unsigned int concurrency,
const MAC &mac,
unsigned int mtu,
unsigned int metric,
@ -128,7 +127,6 @@ LinuxEthernetTap::LinuxEthernetTap(
_fd(0),
_enabled(true),
_run(true),
_concurrency(concurrency),
_lastIfAddrsUpdate(0)
{
static std::mutex s_tapCreateLock;
@ -231,12 +229,27 @@ LinuxEthernetTap::LinuxEthernetTap(
}
}
int _concurrency = 1;
char* concurrencyVar = std::getenv("ZT_PACKET_PROCESSING_CONCURRENCY");
if (concurrencyVar) {
int tmp = atoi(concurrencyVar);
if (tmp > 0) {
_concurrency = tmp;
}
else {
_concurrency = std::max((unsigned int)1,std::thread::hardware_concurrency() / 2);
}
}
else {
_concurrency = std::max((unsigned int)1,std::thread::hardware_concurrency() / 2);
}
for (unsigned int i = 0; i < _concurrency; ++i) {
_rxThreads.push_back(std::thread([this, i, _enablePinning] {
_rxThreads.push_back(std::thread([this, i, _concurrency, _enablePinning] {
if (_enablePinning) {
int pinCore = i % _concurrency;
fprintf(stderr, "pinning thread %d to core %d\n", i, pinCore);
fprintf(stderr, "pinning tap thread %d to core %d\n", i, pinCore);
pthread_t self = pthread_self();
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
@ -244,7 +257,7 @@ LinuxEthernetTap::LinuxEthernetTap(
int rc = pthread_setaffinity_np(self, sizeof(cpu_set_t), &cpuset);
if (rc != 0)
{
fprintf(stderr, "failed to pin thread %d to core %d: %s\n", i, pinCore, strerror(errno));
fprintf(stderr, "failed to pin tap thread %d to core %d: %s\n", i, pinCore, strerror(errno));
exit(1);
}
}