== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:00:31 (1788890431)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.26096 s, 16.7 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-ffff92fa0a7e0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.77581
Iter 1/10: OSS cache speed: 1.92787
Iter 1/10: ladvise speed: 2.56855
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.38861
Iter 2/10: OSS cache speed: 2.05349
Iter 2/10: ladvise speed: 1.73232
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.60701
Iter 3/10: OSS cache speed: 0.850113
Iter 3/10: ladvise speed: 1.16254
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.01539
Iter 4/10: OSS cache speed: 1.23171
Iter 4/10: ladvise speed: 1.30887
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.24506
Iter 5/10: OSS cache speed: 1.64048
Iter 5/10: ladvise speed: 1.7646
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.74001
Iter 6/10: OSS cache speed: 1.74401
Iter 6/10: ladvise speed: 1.69596
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.21311
Iter 7/10: OSS cache speed: 1.35364
Iter 7/10: ladvise speed: 1.5222
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.46206
Iter 8/10: OSS cache speed: 1.97831
Iter 8/10: ladvise speed: 2.45193
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.2818
Iter 9/10: OSS cache speed: 2.08439
Iter 9/10: ladvise speed: 2.55678
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.46923
Iter 10/10: OSS cache speed: 2.4765
Iter 10/10: ladvise speed: 2.33883
Average uncached read: 1.81
Average speedup with OSS cached read:  1.73 = +-4%
Average speedup with ladvise willread:  1.91 = +5%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0