== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:46:04 (1778355964)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.78099 s, 18.1 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-ffff892404b2f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.21949
Iter 1/10: OSS cache speed: 2.31579
Iter 1/10: ladvise speed: 2.39833
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.0494
Iter 2/10: OSS cache speed: 2.19072
Iter 2/10: ladvise speed: 2.43383
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.07902
Iter 3/10: OSS cache speed: 2.50912
Iter 3/10: ladvise speed: 2.30491
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.26446
Iter 4/10: OSS cache speed: 2.59541
Iter 4/10: ladvise speed: 2.50631
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.17375
Iter 5/10: OSS cache speed: 2.57623
Iter 5/10: ladvise speed: 2.41183
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.27886
Iter 6/10: OSS cache speed: 2.45342
Iter 6/10: ladvise speed: 2.48115
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.41831
Iter 7/10: OSS cache speed: 2.80015
Iter 7/10: ladvise speed: 2.73189
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.43314
Iter 8/10: OSS cache speed: 2.56764
Iter 8/10: ladvise speed: 2.66802
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.26719
Iter 9/10: OSS cache speed: 2.36249
Iter 9/10: ladvise speed: 2.34814
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.25542
Iter 10/10: OSS cache speed: 2.44682
Iter 10/10: ladvise speed: 2.36575
Average uncached read: 2.24
Average speedup with OSS cached read:  2.48 = +10%
Average speedup with ladvise willread:  2.46 = +9%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0