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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "MLUtils.h"
#include "prsystem.h"
#include "mozilla/Casting.h"
#include <sys/types.h>
#if defined(XP_WIN)
# include <sysinfoapi.h>
#endif
#if defined(XP_MACOSX)
# include <sys/sysctl.h>
# include <mach/mach.h>
#endif
#if defined(XP_LINUX)
# include <sys/sysinfo.h>
#endif
namespace mozilla::ml {
NS_IMPL_ISUPPORTS(MLUtils, nsIMLUtils)
/**
* See nsIMLUtils for the method documentation.
*/
NS_IMETHODIMP MLUtils::HasEnoughMemoryToInfer(uint64_t aModelSizeInMemory,
uint32_t aThresholdPercentage,
uint64_t aMinMemoryRequirement,
bool* _retval) {
// Check for the physical memory. On devices with less than
// `aMinMemoryRequirement`, we give up.
uint64_t totalMemory = PR_GetPhysicalMemorySize();
if (totalMemory <= aMinMemoryRequirement) {
// We are not doing inference if the device has less than what is required.
*_retval = false;
return NS_OK;
}
// Ensure threshold is valid and within 0-100 range
if (aThresholdPercentage <= 0 || aThresholdPercentage > 100) {
*_retval = false;
return NS_ERROR_FAILURE; // throw an error
}
// Convert the threshold percentage to a usable value (e.g., 80% becomes 0.8)
double threshold = static_cast<double>(aThresholdPercentage) / 100.0f;
// Determin the available resident memory on different platforms.
uint64_t availableResidentMemory = 0;
#if defined(XP_WIN)
MEMORYSTATUSEX memStatus = {sizeof(memStatus)};
if (GlobalMemoryStatusEx(&memStatus)) {
availableResidentMemory = memStatus.ullAvailPhys;
} else {
return NS_ERROR_FAILURE;
}
#endif
#if defined(XP_MACOSX)
mach_port_t host_port = mach_host_self();
vm_size_t page_size;
vm_statistics64_data_t vm_stats;
mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
if (host_page_size(host_port, &page_size) != KERN_SUCCESS ||
host_statistics64(host_port, HOST_VM_INFO64,
reinterpret_cast<host_info64_t>(&vm_stats),
&count) != KERN_SUCCESS) {
*_retval = false;
return NS_ERROR_FAILURE;
}
availableResidentMemory =
static_cast<uint64_t>(vm_stats.free_count + vm_stats.inactive_count) *
page_size;
#endif
#if defined(XP_LINUX)
struct sysinfo memInfo {
0
};
if (sysinfo(&memInfo) != 0) {
*_retval = false;
return NS_ERROR_FAILURE;
}
availableResidentMemory = memInfo.freeram * memInfo.mem_unit;
#endif
// Check if the modelSize fits within memory using the threshold
*_retval = AssertedCast<double>(aModelSizeInMemory) <=
AssertedCast<double>(availableResidentMemory) * threshold;
return NS_OK;
}
} // namespace mozilla::ml