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Added config option "cpu/max-threads-hint" and command line option "--cpu-max-threads-hint".

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This commit is contained in:
XMRig 2019-09-28 02:02:20 +07:00
parent daed23422e
commit 7c463849cc
14 changed files with 97 additions and 57 deletions
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39
src/backend/cpu/platform/HwlocCpuInfo.cpp
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@ -29,6 +29,7 @@
#include <algorithm>
#include <cmath>
#include <hwloc.h>
@ -127,9 +128,7 @@ static inline bool isCacheExclusive(hwloc_obj_t obj)
} // namespace xmrig
xmrig::HwlocCpuInfo::HwlocCpuInfo() : BasicCpuInfo(),
m_backend(),
m_cache()
xmrig::HwlocCpuInfo::HwlocCpuInfo()
{
m_threads = 0;
@ -149,7 +148,7 @@ xmrig::HwlocCpuInfo::HwlocCpuInfo() : BasicCpuInfo(),
# endif
const std::vector<hwloc_obj_t> packages = findByType(hwloc_get_root_obj(m_topology), HWLOC_OBJ_PACKAGE);
if (packages.size()) {
if (!packages.empty()) {
const char *value = hwloc_obj_get_info_by_name(packages[0], "CPUModel");
if (value) {
strncpy(m_brand, value, 64);
@ -202,10 +201,10 @@ xmrig::HwlocCpuInfo::~HwlocCpuInfo()
}
xmrig::CpuThreads xmrig::HwlocCpuInfo::threads(const Algorithm &algorithm) const
xmrig::CpuThreads xmrig::HwlocCpuInfo::threads(const Algorithm &algorithm, uint32_t limit) const
{
if (L2() == 0 && L3() == 0) {
return BasicCpuInfo::threads(algorithm);
return BasicCpuInfo::threads(algorithm, limit);
}
const unsigned depth = L3() > 0 ? 3 : 2;
@ -218,21 +217,37 @@ xmrig::CpuThreads xmrig::HwlocCpuInfo::threads(const Algorithm &algorithm) const
findCache(hwloc_get_root_obj(m_topology), depth, depth, [&caches](hwloc_obj_t found) { caches.emplace_back(found); });
for (hwloc_obj_t cache : caches) {
processTopLevelCache(cache, algorithm, threads);
if (limit > 0 && limit < 100 && !caches.empty()) {
const double maxTotalThreads = round(m_threads * (limit / 100.0));
const auto maxPerCache = std::max(static_cast<int>(round(maxTotalThreads / caches.size())), 1);
int remaining = std::max(static_cast<int>(maxTotalThreads), 1);
for (hwloc_obj_t cache : caches) {
processTopLevelCache(cache, algorithm, threads, std::min(maxPerCache, remaining));
remaining -= maxPerCache;
if (remaining <= 0) {
break;
}
}
}
else {
for (hwloc_obj_t cache : caches) {
processTopLevelCache(cache, algorithm, threads, 0);
}
}
if (threads.isEmpty()) {
LOG_WARN("hwloc auto configuration for algorithm \"%s\" failed.", algorithm.shortName());
return BasicCpuInfo::threads(algorithm);
return BasicCpuInfo::threads(algorithm, limit);
}
return threads;
}
void xmrig::HwlocCpuInfo::processTopLevelCache(hwloc_obj_t cache, const Algorithm &algorithm, CpuThreads &threads) const
void xmrig::HwlocCpuInfo::processTopLevelCache(hwloc_obj_t cache, const Algorithm &algorithm, CpuThreads &threads, size_t limit) const
{
constexpr size_t oneMiB = 1024u * 1024u;
@ -296,6 +311,10 @@ void xmrig::HwlocCpuInfo::processTopLevelCache(hwloc_obj_t cache, const Algorith
}
# endif
if (limit > 0) {
cacheHashes = std::min(cacheHashes, limit);
}
if (cacheHashes >= PUs) {
for (hwloc_obj_t core : cores) {
const std::vector<hwloc_obj_t> units = findByType(core, HWLOC_OBJ_PU);