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 iYAMEMUh 1GXRKalfMMpzxe+oghHXdVeZ4YTM5KfC7yxRSAY2LiRUJyfw9JOK4X3j74jZuUKPX5UekgZVC1bIu0xZDlSCZjz9c9evkGKPKN24p3+pcrz+Nq3XIbnajwme2AzgFbVzqT7pAp6naUMhIXScS62bkfGkWBqdlTkMVCcdJMVExis2BgTiT471tCCQFhicaYxku+BMmAS1bhsUllfE8BU45BgYMBlNU3ueNBE0yJyxx1gQxm0HoeUDX0rz29wHA7GRjVMCUnenclejmRRPcAKTTQAQTufKk86h5R6pshNr9q1sWSYa4cWcwU8FN4QcK73oyX35gv9OrMwEF6txxwXVxW2yyfIwtC0MNp3PSAXsbsqyJx6Srsx3WzxXsdMb4rvayDN1pAtrHCZv4BcmlnD4pVxp3ISsL/0SdcYxaJBleTke8q1YcMa8OXnk4j0Xhlni+jEIxzz7RBL06xZ/bSpSzqpUFqy9Xd37kiXWN/j1SnvKjQ3U= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Benchmark : Graph500 reference BFS, SCALE=28, edgefactor=16, 128 ranks Topology : top-tier NUMA node=1 (CPUs+DRAM), lower-tier node=2 (mem-only/CXL) Config legend ------------- R1 : base kernel, no tiering (numa_balancing=0) R2 : base kernel, tiering (numa_balancing=2 / NUMAB2) R3 : pghot kernel, hintfaults source (pghot_enabled_sources=1, pghot_freq_threshold=1, numa_balancing=2, promotion=on) R4 : pghot kernel, hwhints source (pghot_enabled_sources=2, pghot_freq_threshold=1, IBS mem-profiler on, numa_balancing=0, promotion=off) Column legend ------------- hmean : harmonic_mean_TEPS (primary Graph500 metric) hstddev : harmonic_stddev_TEPS median : median_TEPS bfs_t : mean BFS time (seconds) spdup : speedup of hmean vs R1 baseline Table 1: Performance -------------------- +--------+------------+----------+------------+---------+--------+ | Config | hmean | hstddev | median | bfs_t | spdup | | | (TEPS) | (TEPS) | (TEPS) | (sec) | | +--------+------------+----------+------------+---------+--------+ | R1 | 5.469e+08 | 4.55e+05 | 5.468e+08 | 7.853 | 1.00x | | R2 | 1.442e+09 | 8.04e+07 | 1.491e+09 | 2.979 | 2.64x | | R3 | 1.362e+09 | 7.92e+07 | 1.515e+09 | 3.153 | 2.49x | | R4 | 1.463e+09 | 1.35e+07 | 1.487e+09 | 2.935 | 2.68x | +--------+------------+----------+------------+---------+--------+ Table 2: Relevant kernel counters (/proc/vmstat deltas over the run) -------------------------------------------------------------------- Values are accumulated deltas (before -> after) for the whole run. +----------------------------+-----------+-----------+-----------+-----------+ | Counter | R1 | R2 | R3 | R4 | +----------------------------+-----------+-----------+-----------+-----------+ | numa_pte_updates | 0 | 26675234 | 28872628 | 0 | | numa_hint_faults | 0 | 13747383 | 15501854 | 0 | | numa_pages_migrated | 0 | 13747376 | 13726437 | 3683579 | | pgpromote_success | 0 | 13747254 | 13726437 | 3683579 | | pghot_recorded_accesses | 0 | 0 | 15501778 | 3682112 | | pghot_recorded_hintfaults | 0 | 0 | 15501854 | 0 | | pghot_recorded_hwhints | 0 | 0 | 0 | 24291151 | | hwhint_total_events | 0 | 0 | 0 | 24291198 | | hwhint_dram_accesses | 0 | 0 | 0 | 19588681 | | hwhint_extmem_accesses | 0 | 0 | 0 | 3663926 | | pgmigrate_success | 26840188 | 40586709 | 40570940 | 30521808 | +----------------------------+-----------+-----------+-----------+-----------+ Key findings ------------ 1. Tiering helps Graph500. 2. pghot-hintfaults is on par with base NUMAB2 tiering. 3. pghot-hwhints (R4) matches NUMAB=2 performance with zero NUMA hint faults.