== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:22:34 (1717557754)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.279743 s, 375 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-ffff88012a656800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 5.67517
Iter 1/10: OSS cache speed: 5.67851
Iter 1/10: ladvise speed: 6.14094
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 4.77721
Iter 2/10: OSS cache speed: 5.23859
Iter 2/10: ladvise speed: 4.17853
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 5.19338
Iter 3/10: OSS cache speed: 5.87783
Iter 3/10: ladvise speed: 5.73163
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 4.92485
Iter 4/10: OSS cache speed: 5.44263
Iter 4/10: ladvise speed: 6.46354
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 5.81194
Iter 5/10: OSS cache speed: 6.59491
Iter 5/10: ladvise speed: 6.5997
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 5.82828
Iter 6/10: OSS cache speed: 6.31061
Iter 6/10: ladvise speed: 5.24801
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 5.69585
Iter 7/10: OSS cache speed: 4.36338
Iter 7/10: ladvise speed: 3.74757
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 3.21087
Iter 8/10: OSS cache speed: 4.04498
Iter 8/10: ladvise speed: 3.43189
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 3.60003
Iter 9/10: OSS cache speed: 3.2514
Iter 9/10: ladvise speed: 3.23689
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 3.07365
Iter 10/10: OSS cache speed: 3.71733
Iter 10/10: ladvise speed: 3.32043
Average uncached read: 4.77
Average speedup with OSS cached read: 5.05 = +5.87%
Average speedup with ladvise willread: 4.80 = +.62%
Speedup with OSS cached read less than 20%, got 5.87%. Skipping ladvise willread check.
fail_loc=0