== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:58:15 (1788361095)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.1959 s, 10.3 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-ffff88f4433c0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.441228
Iter 1/10: OSS cache speed: 0.51577
Iter 1/10: ladvise speed: 0.571338
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.527774
Iter 2/10: OSS cache speed: 0.630078
Iter 2/10: ladvise speed: 0.65631
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.628573
Iter 3/10: OSS cache speed: 0.811584
Iter 3/10: ladvise speed: 0.88098
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.819407
Iter 4/10: OSS cache speed: 0.855049
Iter 4/10: ladvise speed: 0.938482
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.77915
Iter 5/10: OSS cache speed: 0.873524
Iter 5/10: ladvise speed: 0.941553
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.901611
Iter 6/10: OSS cache speed: 0.972822
Iter 6/10: ladvise speed: 0.870394
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.754112
Iter 7/10: OSS cache speed: 0.924399
Iter 7/10: ladvise speed: 0.832577
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.962772
Iter 8/10: OSS cache speed: 0.88357
Iter 8/10: ladvise speed: 0.425617
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.531498
Iter 9/10: OSS cache speed: 0.568536
Iter 9/10: ladvise speed: 0.603427
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.570849
Iter 10/10: OSS cache speed: 0.684063
Iter 10/10: ladvise speed: 0.671311
Average uncached read: .69
Average speedup with OSS cached read:  .77 = +11%
Average speedup with ladvise willread:  .73 = +5%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0