== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:14:03 (1781684043)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.58482 s, 15.9 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-ffff89b1c32f1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.89153
Iter 1/10: OSS cache speed: 2.12421
Iter 1/10: ladvise speed: 2.29244
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.21979
Iter 2/10: OSS cache speed: 2.20325
Iter 2/10: ladvise speed: 2.0495
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.93161
Iter 3/10: OSS cache speed: 2.44346
Iter 3/10: ladvise speed: 2.48999
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.03407
Iter 4/10: OSS cache speed: 2.43411
Iter 4/10: ladvise speed: 2.5678
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.23191
Iter 5/10: OSS cache speed: 2.56186
Iter 5/10: ladvise speed: 2.53428
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.41308
Iter 6/10: OSS cache speed: 2.5616
Iter 6/10: ladvise speed: 2.43634
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.39451
Iter 7/10: OSS cache speed: 2.36956
Iter 7/10: ladvise speed: 2.49778
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.80522
Iter 8/10: OSS cache speed: 0.797674
Iter 8/10: ladvise speed: 1.09798
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.738174
Iter 9/10: OSS cache speed: 1.26488
Iter 9/10: ladvise speed: 0.922975
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.756751
Iter 10/10: OSS cache speed: 1.06489
Iter 10/10: ladvise speed: 0.520241
Average uncached read: 1.84
Average speedup with OSS cached read:  1.98 = +7%
Average speedup with ladvise willread:  1.94 = +5%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0