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| author | eunhhu <[email protected]> | 2026-09-30 17:59:47 +0100 |
|---|---|---|
| committer | eunhhu <[email protected]> | 2026-09-30 17:59:47 +0100 |
| commit | 402c19311b247889b36ff3be834d9fab19555af7 (patch) | |
| tree | e243c7b97b8bdaf894c0487ccbcfc4def633f5d4 /research/experiments/025-i64-cost/fcc1f67-interfered/2026-09-30-load.txt | |
| parent | 07047c391f32c43827c0da145f6c89edb5007941 (diff) | |
| download | pure-402c19311b247889b36ff3be834d9fab19555af7.tar.gz pure-402c19311b247889b36ff3be834d9fab19555af7.zip | |
Count instructions where timing cannot tell 3% apart (110)
016's second stage passed its criterion: six interleaved pairs against
ee21aec gave TPC-C (RAM, W=1) -0.6% at the median and the bank's
queries 0.0% to +2.2%, no run interfered. The ranks query was slower
all six times, and chasing it showed that on this Pi timing cannot
separate 1-3%: two servers asked in turns disagree with themselves
(ee21aec to e02bfc9 +1.6%, e02bfc9 to 481642f -1.2%, ee21aec to 481642f
+2.8%), and a query whose instructions grew 0.6% ran 3.5% faster.
Instructions do not move so: pcount.c counts the server's user-mode
instructions with perf_event_open (no perf here), and psample.c samples
where they go. ranks had grown 0.4% in instructions (the rest was where
code and data landed), per_branch 3.6% and tables 20 instructions a row,
which 07047c3 halved. The six pairs of 07047c3 were interfered (another
session's build, load 4-12) and are kept apart, unused.
Diffstat (limited to 'research/experiments/025-i64-cost/fcc1f67-interfered/2026-09-30-load.txt')
| -rw-r--r-- | research/experiments/025-i64-cost/fcc1f67-interfered/2026-09-30-load.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/research/experiments/025-i64-cost/fcc1f67-interfered/2026-09-30-load.txt b/research/experiments/025-i64-cost/fcc1f67-interfered/2026-09-30-load.txt new file mode 100644 index 0000000..18be78e --- /dev/null +++ b/research/experiments/025-i64-cost/fcc1f67-interfered/2026-09-30-load.txt @@ -0,0 +1,12 @@ +1 before 17:28:01 up 1 day, 20:40, 3 users, load average: 1.22, 1.28, 1.47 +1 after 17:29:29 up 1 day, 20:41, 3 users, load average: 1.65, 1.44, 1.52 +2 after 17:31:00 up 1 day, 20:43, 3 users, load average: 3.61, 2.19, 1.78 +2 before 17:33:15 up 1 day, 20:45, 3 users, load average: 11.75, 5.91, 3.21 +3 before 17:35:20 up 1 day, 20:47, 3 users, load average: 5.84, 6.06, 3.64 +3 after 17:37:08 up 1 day, 20:49, 3 users, load average: 4.27, 5.38, 3.66 +4 after 17:38:53 up 1 day, 20:51, 3 users, load average: 4.34, 5.13, 3.76 +4 before 17:40:37 up 1 day, 20:53, 3 users, load average: 10.08, 6.81, 4.51 +5 before 17:42:16 up 1 day, 20:54, 3 users, load average: 11.89, 8.36, 5.29 +5 after 17:44:43 up 1 day, 20:57, 3 users, load average: 5.86, 8.35, 5.84 +6 after 17:46:14 up 1 day, 20:58, 3 users, load average: 3.61, 6.97, 5.58 +6 before 17:48:14 up 1 day, 21:00, 3 users, load average: 5.43, 6.50, 5.57 |