== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:49:24 (1780087764)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.07685 s, 17.3 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-ffff98eec862e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.34585
Iter 1/10: OSS cache speed: 1.46577
Iter 1/10: ladvise speed: 1.56222
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.47025
Iter 2/10: OSS cache speed: 1.86449
Iter 2/10: ladvise speed: 2.25704
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.13609
Iter 3/10: OSS cache speed: 2.16512
Iter 3/10: ladvise speed: 2.4346
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.31021
Iter 4/10: OSS cache speed: 2.33606
Iter 4/10: ladvise speed: 2.4904
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.28464
Iter 5/10: OSS cache speed: 2.3177
Iter 5/10: ladvise speed: 2.3608
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.17466
Iter 6/10: OSS cache speed: 2.27738
Iter 6/10: ladvise speed: 2.3672
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.20715
Iter 7/10: OSS cache speed: 2.31904
Iter 7/10: ladvise speed: 2.22761
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.17842
Iter 8/10: OSS cache speed: 2.56853
Iter 8/10: ladvise speed: 2.19174
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.833406
Iter 9/10: OSS cache speed: 1.26228
Iter 9/10: ladvise speed: 1.40617
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.61485
Iter 10/10: OSS cache speed: 1.8988
Iter 10/10: ladvise speed: 2.16981
Average uncached read: 1.85
Average speedup with OSS cached read:  2.04 = +10%
Average speedup with ladvise willread:  2.14 = +15%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0