== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:34:44 (1761237284)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.76367 s, 13.5 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-ffff9c20581bc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.517012
Iter 1/10: OSS cache speed: 0.503282
Iter 1/10: ladvise speed: 0.537616
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.484237
Iter 2/10: OSS cache speed: 0.391153
Iter 2/10: ladvise speed: 0.391455
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.417502
Iter 3/10: OSS cache speed: 0.404469
Iter 3/10: ladvise speed: 0.463731
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.458001
Iter 4/10: OSS cache speed: 0.421614
Iter 4/10: ladvise speed: 0.463378
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.490149
Iter 5/10: OSS cache speed: 0.526708
Iter 5/10: ladvise speed: 0.498752
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.476494
Iter 6/10: OSS cache speed: 0.446857
Iter 6/10: ladvise speed: 0.521604
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.506388
Iter 7/10: OSS cache speed: 0.511172
Iter 7/10: ladvise speed: 0.536602
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.550562
Iter 8/10: OSS cache speed: 0.451016
Iter 8/10: ladvise speed: 0.509666
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.503746
Iter 9/10: OSS cache speed: 0.502654
Iter 9/10: ladvise speed: 0.50635
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.513887
Iter 10/10: OSS cache speed: 0.512091
Iter 10/10: ladvise speed: 0.522677
Average uncached read: .49
Average speedup with OSS cached read:  .46 = +-6%
Average speedup with ladvise willread:  .49 = +0%
Speedup with OSS cached read less than 20%,  got -6%. Skipping ladvise willread check.
fail_loc=0