== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:42:14 (1784342534)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.50443 s, 16.1 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff954410c5c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.23398
Iter 1/10: OSS cache speed: 2.39883
Iter 1/10: ladvise speed: 2.37265
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.22499
Iter 2/10: OSS cache speed: 2.38388
Iter 2/10: ladvise speed: 2.26327
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.18735
Iter 3/10: OSS cache speed: 2.40615
Iter 3/10: ladvise speed: 2.42579
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.19514
Iter 4/10: OSS cache speed: 2.342
Iter 4/10: ladvise speed: 2.36084
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.18057
Iter 5/10: OSS cache speed: 2.42353
Iter 5/10: ladvise speed: 2.3155
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.159
Iter 6/10: OSS cache speed: 1.99
Iter 6/10: ladvise speed: 1.35597
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.38913
Iter 7/10: OSS cache speed: 1.7085
Iter 7/10: ladvise speed: 1.62704
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.92876
Iter 8/10: OSS cache speed: 2.02276
Iter 8/10: ladvise speed: 1.91825
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.92808
Iter 9/10: OSS cache speed: 2.29823
Iter 9/10: ladvise speed: 2.36575
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.37773
Iter 10/10: OSS cache speed: 2.47295
Iter 10/10: ladvise speed: 2.52467
Average uncached read: 2.08
Average speedup with OSS cached read:  2.24 = +7%
Average speedup with ladvise willread:  2.15 = +3%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0