== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:26:10 (1722785170)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.37594 s, 44.1 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-ffff88013767d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.77617
Iter 1/10: OSS cache speed: 2.77597
Iter 1/10: ladvise speed: 1.74239
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.0996
Iter 2/10: OSS cache speed: 2.15263
Iter 2/10: ladvise speed: 2.15673
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.11109
Iter 3/10: OSS cache speed: 2.14686
Iter 3/10: ladvise speed: 1.89954
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.07344
Iter 4/10: OSS cache speed: 2.41309
Iter 4/10: ladvise speed: 2.49653
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.69407
Iter 5/10: OSS cache speed: 2.58359
Iter 5/10: ladvise speed: 2.37667
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.42431
Iter 6/10: OSS cache speed: 2.47234
Iter 6/10: ladvise speed: 2.53712
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.84667
Iter 7/10: OSS cache speed: 2.28611
Iter 7/10: ladvise speed: 1.77727
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.95982
Iter 8/10: OSS cache speed: 2.00534
Iter 8/10: ladvise speed: 2.0378
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.33235
Iter 9/10: OSS cache speed: 2.51365
Iter 9/10: ladvise speed: 2.36482
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.36409
Iter 10/10: OSS cache speed: 2.48954
Iter 10/10: ladvise speed: 2.55745
Average uncached read: 2.26
Average speedup with OSS cached read: 2.38 = +5.30%
Average speedup with ladvise willread: 2.19 = +-3.09%
Speedup with OSS cached read less than 20%, got 5.30%. Skipping ladvise willread check.
fail_loc=0