== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:37:50 (1752511070)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.05317 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-ffff8f6bc4d58800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.08842
Iter 1/10: OSS cache speed: 2.07837
Iter 1/10: ladvise speed: 1.98935
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.89678
Iter 2/10: OSS cache speed: 1.78951
Iter 2/10: ladvise speed: 0.709543
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.02594
Iter 3/10: OSS cache speed: 1.00746
Iter 3/10: ladvise speed: 1.74677
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.49497
Iter 4/10: OSS cache speed: 1.65719
Iter 4/10: ladvise speed: 1.94425
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.73064
Iter 5/10: OSS cache speed: 1.80843
Iter 5/10: ladvise speed: 1.79052
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.20759
Iter 6/10: OSS cache speed: 2.09579
Iter 6/10: ladvise speed: 2.30327
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.19483
Iter 7/10: OSS cache speed: 2.1475
Iter 7/10: ladvise speed: 2.099
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.3278
Iter 8/10: OSS cache speed: 1.60091
Iter 8/10: ladvise speed: 2.07881
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.06294
Iter 9/10: OSS cache speed: 2.26982
Iter 9/10: ladvise speed: 2.32353
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.18764
Iter 10/10: OSS cache speed: 2.1263
Iter 10/10: ladvise speed: 2.10145
Average uncached read: 1.82
Average speedup with OSS cached read:  1.85 = +1%
Average speedup with ladvise willread:  1.90 = +4%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0