== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:03:26 (1788833006)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8572 s, 7.6 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-ffff9f8487fc1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.351842
Iter 1/10: OSS cache speed: 0.434968
Iter 1/10: ladvise speed: 0.349505
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.375558
Iter 2/10: OSS cache speed: 0.486608
Iter 2/10: ladvise speed: 0.471545
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.464051
Iter 3/10: OSS cache speed: 0.46985
Iter 3/10: ladvise speed: 0.454897
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.492283
Iter 4/10: OSS cache speed: 0.503125
Iter 4/10: ladvise speed: 0.493261
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.441344
Iter 5/10: OSS cache speed: 0.408783
Iter 5/10: ladvise speed: 0.476526
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.407235
Iter 6/10: OSS cache speed: 0.466492
Iter 6/10: ladvise speed: 0.436837
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344118
Iter 7/10: OSS cache speed: 0.460158
Iter 7/10: ladvise speed: 0.406714
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.398787
Iter 8/10: OSS cache speed: 0.477891
Iter 8/10: ladvise speed: 0.412391
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.396125
Iter 9/10: OSS cache speed: 0.419835
Iter 9/10: ladvise speed: 0.407751
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.496713
Iter 10/10: OSS cache speed: 0.504779
Iter 10/10: ladvise speed: 0.475612
Average uncached read: .41
Average speedup with OSS cached read:  .46 = +12%
Average speedup with ladvise willread:  .43 = +4%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0