== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:41:34 (1788748894)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4132 s, 9.2 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-ffff9f2c20555000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.534829
Iter 1/10: OSS cache speed: 0.621855
Iter 1/10: ladvise speed: 0.626126
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.531766
Iter 2/10: OSS cache speed: 0.58946
Iter 2/10: ladvise speed: 0.627462
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.519134
Iter 3/10: OSS cache speed: 0.606111
Iter 3/10: ladvise speed: 0.53516
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.367976
Iter 4/10: OSS cache speed: 0.439516
Iter 4/10: ladvise speed: 0.534417
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.40891
Iter 5/10: OSS cache speed: 0.391719
Iter 5/10: ladvise speed: 0.412362
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.33372
Iter 6/10: OSS cache speed: 0.41492
Iter 6/10: ladvise speed: 0.424918
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.411157
Iter 7/10: OSS cache speed: 0.450909
Iter 7/10: ladvise speed: 0.401238
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.392492
Iter 8/10: OSS cache speed: 0.463554
Iter 8/10: ladvise speed: 0.402237
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.414664
Iter 9/10: OSS cache speed: 0.49201
Iter 9/10: ladvise speed: 0.459277
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.449046
Iter 10/10: OSS cache speed: 0.486853
Iter 10/10: ladvise speed: 0.486562
Average uncached read: .43
Average speedup with OSS cached read:  .49 = +13%
Average speedup with ladvise willread:  .49 = +13%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0