== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:49:13 (1724762953)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.78027 s, 27.7 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-ffff8800aad03000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.58888
Iter 1/10: OSS cache speed: 1.18953
Iter 1/10: ladvise speed: 1.79924
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.77501
Iter 2/10: OSS cache speed: 2.19837
Iter 2/10: ladvise speed: 2.24522
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.01825
Iter 3/10: OSS cache speed: 2.0725
Iter 3/10: ladvise speed: 2.15546
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.1087
Iter 4/10: OSS cache speed: 2.32502
Iter 4/10: ladvise speed: 2.33545
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.31947
Iter 5/10: OSS cache speed: 2.49045
Iter 5/10: ladvise speed: 2.72724
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.50687
Iter 6/10: OSS cache speed: 2.77928
Iter 6/10: ladvise speed: 3.27617
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.80124
Iter 7/10: OSS cache speed: 3.23392
Iter 7/10: ladvise speed: 3.2214
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.90272
Iter 8/10: OSS cache speed: 2.4526
Iter 8/10: ladvise speed: 2.15839
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.2075
Iter 9/10: OSS cache speed: 3.0558
Iter 9/10: ladvise speed: 3.16363
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.98343
Iter 10/10: OSS cache speed: 3.16545
Iter 10/10: ladvise speed: 3.4035
Average uncached read: 2.22
Average speedup with OSS cached read: 2.49 = +12.16%
Average speedup with ladvise willread: 2.64 = +18.91%
Speedup with OSS cached read less than 20%, got 12.16%. Skipping ladvise willread check.
fail_loc=0