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Threshold computation & calibration enhancements

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This commit is contained in:
GuillaumeDIDIER 2020-08-04 14:34:18 +02:00
parent 5cd3150a4b
commit a2d494d610
2 changed files with 277 additions and 88 deletions
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212
cache_utils/src/bin/two_thread_cal.rs
View File

@ -1,7 +1,7 @@
use cache_utils::calibration::{
calibrate_fixed_freq_2_thread, flush_and_reload, load_and_flush, only_flush, only_reload,
reload_and_flush, CalibrateOperation2T, CalibrationOptions, HistParams, Verbosity,
CFLUSH_BUCKET_NUMBER, CFLUSH_BUCKET_SIZE, CFLUSH_NUM_ITER,
calibrate_fixed_freq_2_thread, flush_and_reload, get_cache_slicing, load_and_flush, only_flush,
only_reload, reload_and_flush, CalibrateOperation2T, CalibrateResult2T, CalibrationOptions,
HistParams, Verbosity, CFLUSH_BUCKET_NUMBER, CFLUSH_BUCKET_SIZE, CFLUSH_NUM_ITER,
};
use cache_utils::mmap::MMappedMemory;
use cache_utils::{flush, maccess, noop};
@ -9,6 +9,8 @@ use nix::sched::{sched_getaffinity, CpuSet};
use nix::unistd::Pid;
use core::arch::x86_64 as arch_x86;
use std::collections::HashMap;
use std::process::Command;
use std::str::from_utf8;
@ -26,6 +28,39 @@ unsafe fn multiple_access(p: *const u8) {
const SIZE: usize = 2 << 20;
#[derive(Clone, Copy, Hash, Eq, PartialEq, Debug)]
struct ASV {
pub attacker: u8,
pub slice: u8,
pub victim: u8,
}
struct ResultAnalysis {
// indexed by bucket size
pub miss: Vec<u32>,
pub miss_cum_sum: Vec<u32>,
pub miss_total: u32,
pub hit: Vec<u32>,
pub hit_cum_sum: Vec<u32>,
pub hit_total: u32,
pub error_miss_less_than_hit: Vec<u32>,
pub error_hit_less_than_miss: Vec<u32>,
pub min_error_hlm: u32,
pub min_error_mlh: u32,
}
#[derive(Debug, Clone, Copy)]
struct Threshold {
pub error_rate: f32,
pub threshold: usize,
// extend with other possible algorithm ?
pub is_hlm: bool,
pub num_true_hit: u32,
pub num_false_hit: u32,
pub num_true_miss: u32,
pub num_false_miss: u32,
}
fn main() {
// Grab a slice of memory
@ -75,20 +110,16 @@ fn main() {
if pointer as usize & (cache_line_size - 1) != 0 {
panic!("not aligned nicely");
}
calibrate_fixed_freq_2_thread(
pointer,
64,
array.len() as isize >> 3,
&mut core_pairs.into_iter(),
&[
let operations = [
CalibrateOperation2T {
prepare: multiple_access,
prepare: maccess::<u8>,
op: only_flush,
name: "clflush_remote_hit",
display_name: "clflush remote hit",
},
CalibrateOperation2T {
prepare: multiple_access,
prepare: maccess::<u8>,
op: load_and_flush,
name: "clflush_shared_hit",
display_name: "clflush shared hit",
@ -124,13 +155,13 @@ fn main() {
display_name: "reload miss",
},
CalibrateOperation2T {
prepare: multiple_access,
prepare: maccess::<u8>,
op: reload_and_flush,
name: "reload_remote_hit",
display_name: "reload remote hit",
},
CalibrateOperation2T {
prepare: multiple_access,
prepare: maccess::<u8>,
op: only_reload,
name: "reload_shared_hit",
display_name: "reload shared hit",
@ -141,7 +172,14 @@ fn main() {
name: "reload_local_hit",
display_name: "reload local hit",
},
],
];
let r = calibrate_fixed_freq_2_thread(
pointer,
64,
array.len() as isize >> 3,
&mut core_pairs.into_iter(),
&operations,
CalibrationOptions {
hist_params: HistParams {
bucket_number: CFLUSH_BUCKET_NUMBER,
@ -153,5 +191,151 @@ fn main() {
},
core_per_socket,
);
let mut analysis = HashMap::<ASV, ResultAnalysis>::new();
let miss_name = "clflush_miss_n";
let hit_name = "clflush_remote_hit";
let miss_index = operations
.iter()
.position(|op| op.name == miss_name)
.unwrap();
let hit_index = operations
.iter()
.position(|op| op.name == hit_name)
.unwrap();
let slicing = get_cache_slicing(core_per_socket);
let h = if let Some(s) = slicing {
if s.can_hash() {
|addr: usize| -> u8 { slicing.unwrap().hash(addr).unwrap() }
} else {
panic!("No slicing function known");
}
} else {
panic!("No slicing function known");
};
for result in r {
match result.res {
Err(e) => {
eprintln!("Ooops : {:#?}", e);
panic!()
}
Ok(results) => {
for r in results {
let offset = r.offset;
let miss_hist = r.histogram[miss_index].clone();
let hit_hist = r.histogram[hit_index].clone();
if miss_hist.len() != hit_hist.len() {
panic!("Maformed results");
}
let len = miss_hist.len();
let mut miss_cum_sum = vec![0; len];
let mut hit_cum_sum = vec![0; len];
miss_cum_sum[0] = miss_hist[0];
hit_cum_sum[0] = hit_hist[0];
for i in 1..len {
miss_cum_sum[i] = miss_hist[i] + miss_cum_sum[i - 1];
hit_cum_sum[i] = hit_hist[i] + hit_cum_sum[i - 1];
}
let miss_total = miss_cum_sum[len - 1];
let hit_total = hit_cum_sum[len - 1];
let mut error_miss_less_than_hit = vec![0; len - 1];
let mut error_hit_less_than_miss = vec![0; len - 1];
let mut min_error_hlm = u32::max_value();
let mut min_error_mlh = u32::max_value();
for i in 0..(len - 1) {
error_hit_less_than_miss[i] =
miss_cum_sum[i] + (hit_total - hit_cum_sum[i]);
error_miss_less_than_hit[i] =
hit_cum_sum[i] + (miss_total - miss_cum_sum[i]);
if error_hit_less_than_miss[i] < min_error_hlm {
min_error_hlm = error_hit_less_than_miss[i];
}
if error_miss_less_than_hit[i] < min_error_mlh {
min_error_mlh = error_miss_less_than_hit[i];
}
}
analysis.insert(
ASV {
attacker: result.main_core as u8,
slice: h(offset as usize),
victim: result.helper_core as u8,
},
ResultAnalysis {
miss: miss_hist,
miss_cum_sum,
miss_total,
hit: hit_hist,
hit_cum_sum,
hit_total,
error_miss_less_than_hit,
error_hit_less_than_miss,
min_error_hlm,
min_error_mlh,
},
);
}
}
}
}
let mut thresholds = HashMap::new();
for (asv, results) in analysis {
let hlm = results.min_error_hlm < results.min_error_mlh;
let (errors, min_error) = if hlm {
(&results.error_hit_less_than_miss, results.min_error_hlm)
} else {
(&results.error_miss_less_than_hit, results.min_error_mlh)
};
let mut threshold_vec = Vec::new();
// refactor some of this logic into methods of analysis ?
for i in 0..errors.len() {
if errors[i] == min_error {
let num_true_hit;
let num_false_hit;
let num_true_miss;
let num_false_miss;
if hlm {
num_true_hit = results.hit_cum_sum[i];
num_false_hit = results.miss_cum_sum[i];
num_true_miss = results.miss_total - num_false_hit;
num_false_miss = results.hit_total - num_true_hit;
} else {
num_true_miss = results.miss_cum_sum[i];
num_false_miss = results.hit_cum_sum[i];
num_true_hit = results.hit_total - num_false_miss;
num_false_hit = results.miss_total - num_true_miss;
}
threshold_vec.push(Threshold {
threshold: i,
is_hlm: hlm,
num_true_hit,
num_false_hit,
num_true_miss,
num_false_miss,
error_rate: min_error as f32
/ (results.hit_total + results.miss_total) as f32,
})
}
/*
*/
}
thresholds.insert(asv, threshold_vec);
}
eprintln!("Thresholds :\n{:#?}", thresholds);
println!("Thresholds :\n{:#?}", thresholds);
}
}

49
cache_utils/src/calibration.rs
View File

@ -1,6 +1,6 @@
#![allow(clippy::missing_safety_doc)]
use crate::complex_addressing::cache_slicing;
use crate::complex_addressing::{cache_slicing, CacheSlicing};
use crate::{flush, maccess, rdtsc_fence};
use cpuid::{CPUVendor, MicroArchitecture};
@ -234,11 +234,11 @@ pub fn calibrate_flush(
#[derive(Debug)]
pub struct CalibrateResult {
offset: isize,
histogram: Vec<Vec<u32>>,
median: Vec<u64>,
min: Vec<u64>,
max: Vec<u64>,
pub offset: isize,
pub histogram: Vec<Vec<u32>>,
pub median: Vec<u64>,
pub min: Vec<u64>,
pub max: Vec<u64>,
}
pub struct CalibrateOperation<'a> {
@ -293,6 +293,7 @@ fn calibrate_impl_fixed_freq(
let to_bucket = |time: u64| -> usize { time as usize / hist_params.bucket_size };
let from_bucket = |bucket: usize| -> u64 { (bucket * hist_params.bucket_size) as u64 };
// FIXME : Core per socket
let slicing = if let Some(uarch) = MicroArchitecture::get_micro_architecture() {
if let Some(vendor_family_model_stepping) = MicroArchitecture::get_family_model_stepping() {
Some(cache_slicing(
@ -510,7 +511,25 @@ pub unsafe fn calibrate_fixed_freq_2_thread<I: Iterator<Item = (usize, usize)>>(
)
}
const OPTIMISED_ADDR_ITER_FACTOR: u32 = 64;
pub fn get_cache_slicing(core_per_socket: u8) -> Option<CacheSlicing> {
if let Some(uarch) = MicroArchitecture::get_micro_architecture() {
if let Some(vendor_family_model_stepping) = MicroArchitecture::get_family_model_stepping() {
Some(cache_slicing(
uarch,
core_per_socket,
vendor_family_model_stepping.0,
vendor_family_model_stepping.1,
vendor_family_model_stepping.2,
))
} else {
None
}
} else {
None
}
}
const OPTIMISED_ADDR_ITER_FACTOR: u32 = 16;
// TODO : Add the optimised address support
// TODO : Modularisation / factorisation of some of the common code with the single threaded no_std version ?
@ -540,21 +559,7 @@ fn calibrate_fixed_freq_2_thread_impl<I: Iterator<Item = (usize, usize)>>(
let to_bucket = |time: u64| -> usize { time as usize / bucket_size };
let from_bucket = |bucket: usize| -> u64 { (bucket * bucket_size) as u64 };
let slicing = if let Some(uarch) = MicroArchitecture::get_micro_architecture() {
if let Some(vendor_family_model_stepping) = MicroArchitecture::get_family_model_stepping() {
Some(cache_slicing(
uarch,
core_per_socket,
vendor_family_model_stepping.0,
vendor_family_model_stepping.1,
vendor_family_model_stepping.2,
))
} else {
None
}
} else {
None
};
let slicing = get_cache_slicing(core_per_socket);
let h = if let Some(s) = slicing {
if s.can_hash() {