== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:12:04 (1782483124)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.39799 s, 16.4 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-ffff8d1e46a67800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.698016
Iter 1/10: OSS cache speed: 0.708205
Iter 1/10: ladvise speed: 0.713032
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.61563
Iter 2/10: OSS cache speed: 0.775008
Iter 2/10: ladvise speed: 0.919711
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.704905
Iter 3/10: OSS cache speed: 0.814905
Iter 3/10: ladvise speed: 0.814399
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.768407
Iter 4/10: OSS cache speed: 1.09975
Iter 4/10: ladvise speed: 1.14837
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.22335
Iter 5/10: OSS cache speed: 1.53374
Iter 5/10: ladvise speed: 1.06149
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.497707
Iter 6/10: OSS cache speed: 0.696323
Iter 6/10: ladvise speed: 0.415302
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.324685
Iter 7/10: OSS cache speed: 0.4543
Iter 7/10: ladvise speed: 0.442515
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.439034
Iter 8/10: OSS cache speed: 0.534031
Iter 8/10: ladvise speed: 0.779292
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.731164
Iter 9/10: OSS cache speed: 0.578602
Iter 9/10: ladvise speed: 0.394414
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.506822
Iter 10/10: OSS cache speed: 0.565245
Iter 10/10: ladvise speed: 0.547269
Average uncached read: .65
Average speedup with OSS cached read:  .77 = +18%
Average speedup with ladvise willread:  .72 = +10%
Speedup with OSS cached read less than 20%,  got 18%. Skipping ladvise willread check.
fail_loc=0