Tim Armstrong has posted comments on this change.
Change subject: Update LLVM to 3.7
......................................................................
Patch Set 1:
This version has some small perf regressions but I believe I have the major
ones fixed. I ran a TPC-H benchmark with an older version of the patch and saw
a couple of major regressions, which I've since fixed (it was missing some of
the target machine setup so some optimisation passes didn't know what target
they were optimising for).
I'll post updated perf results when I have a chance to run them:
Cluster Name: UNKNOWN
Lab Run Info: UNKNOWN
Impala Version: impalad version 2.5.0-cdh5.7.0 RELEASE
(2016-02-24)
Baseline Impala Version: impalad version 2.5.0-cdh5.7.0 RELEASE
(2016-02-24)
+-----------+-----------------------+---------+------------+------------+----------------+
| Workload | File Format | Avg (s) | Delta(Avg) | GeoMean(s)
| Delta(GeoMean) |
+-----------+-----------------------+---------+------------+------------+----------------+
| TPCH(_20) | parquet / none / none | 14.68 | +0.96% | 10.06
| +2.66% |
+-----------+-----------------------+---------+------------+------------+----------------+
+-----------+----------+-----------------------+--------+-------------+------------+-----------+----------------+-------------+-------+
| Workload | Query | File Format | Avg(s) | Base Avg(s) |
Delta(Avg) | StdDev(%) | Base StdDev(%) | Num Clients | Iters |
+-----------+----------+-----------------------+--------+-------------+------------+-----------+----------------+-------------+-------+
| TPCH(_20) | TPCH-Q1 | parquet / none / none | 23.24 | 19.47 |
+19.37% | 0.72% | 0.70% | 1 | 10 |
| TPCH(_20) | TPCH-Q8 | parquet / none / none | 8.08 | 7.42 |
+8.90% | 4.46% | 1.35% | 1 | 10 |
| TPCH(_20) | TPCH-Q6 | parquet / none / none | 3.96 | 3.69 |
+7.36% | 2.84% | 2.80% | 1 | 10 |
| TPCH(_20) | TPCH-Q22 | parquet / none / none | 3.76 | 3.58 |
+4.86% | 1.57% | 1.30% | 1 | 10 |
| TPCH(_20) | TPCH-Q14 | parquet / none / none | 4.85 | 4.64 |
+4.46% | 2.25% | 3.80% | 1 | 10 |
| TPCH(_20) | TPCH-Q10 | parquet / none / none | 7.57 | 7.25 |
+4.44% | 1.76% | 1.04% | 1 | 10 |
| TPCH(_20) | TPCH-Q9 | parquet / none / none | 16.83 | 16.13 |
+4.31% | 0.95% | 1.02% | 1 | 10 |
| TPCH(_20) | TPCH-Q12 | parquet / none / none | 5.45 | 5.22 |
+4.31% | 0.72% | 1.22% | 1 | 10 |
| TPCH(_20) | TPCH-Q2 | parquet / none / none | 3.72 | 3.59 |
+3.72% | 1.66% | 1.84% | 1 | 10 |
| TPCH(_20) | TPCH-Q16 | parquet / none / none | 2.52 | 2.44 |
+3.42% | 0.87% | 2.00% | 1 | 10 |
| TPCH(_20) | TPCH-Q18 | parquet / none / none | 18.54 | 17.99 |
+3.10% | 4.03% | 3.39% | 1 | 10 |
| TPCH(_20) | TPCH-Q15 | parquet / none / none | 7.53 | 7.31 |
+2.99% | 2.34% | 2.85% | 1 | 10 |
| TPCH(_20) | TPCH-Q11 | parquet / none / none | 2.79 | 2.74 |
+1.91% | 2.13% | 1.84% | 1 | 10 |
| TPCH(_20) | TPCH-Q3 | parquet / none / none | 8.59 | 8.45 |
+1.64% | 1.38% | 1.43% | 1 | 10 |
| TPCH(_20) | TPCH-Q19 | parquet / none / none | 65.44 | 64.42 |
+1.58% | 1.65% | 1.66% | 1 | 10 |
| TPCH(_20) | TPCH-Q4 | parquet / none / none | 14.52 | 14.36 |
+1.11% | 3.28% | 1.28% | 1 | 10 |
| TPCH(_20) | TPCH-Q20 | parquet / none / none | 8.93 | 8.88 |
+0.59% | 1.51% | 1.36% | 1 | 10 |
| TPCH(_20) | TPCH-Q7 | parquet / none / none | 19.53 | 19.45 |
+0.45% | 1.14% | 1.95% | 1 | 10 |
| TPCH(_20) | TPCH-Q13 | parquet / none / none | 15.38 | 15.34 |
+0.26% | 0.48% | 0.47% | 1 | 10 |
| TPCH(_20) | TPCH-Q5 | parquet / none / none | 13.02 | 13.15 |
-0.97% | 2.90% | 2.79% | 1 | 10 |
| TPCH(_20) | TPCH-Q21 | parquet / none / none | 38.12 | 38.69 |
-1.47% | 1.03% | 0.60% | 1 | 10 |
| TPCH(_20) | TPCH-Q17 | parquet / none / none | 30.66 | 35.77 |
-14.28% | 1.01% | 1.08% | 1 | 10 |
+-----------+----------+-----------------------+--------+-------------+------------+-----------+----------------+-------------+-------+
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Gerrit-MessageType: comment
Gerrit-Change-Id: I17d7afd05ad3b472a0bfe035bfc3daada5597b2d
Gerrit-PatchSet: 1
Gerrit-Project: Impala
Gerrit-Branch: cdh5-trunk
Gerrit-Owner: Tim Armstrong <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-HasComments: No
