== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:43:57 (1733165037)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.54256 s, 23.1 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-ffff88012a9f7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.11948
Iter 1/10: OSS cache speed: 2.01893
Iter 1/10: ladvise speed: 1.43342
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.25881
Iter 2/10: OSS cache speed: 1.85453
Iter 2/10: ladvise speed: 1.63689
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.2432
Iter 3/10: OSS cache speed: 1.92009
Iter 3/10: ladvise speed: 1.97799
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.81997
Iter 4/10: OSS cache speed: 2.4472
Iter 4/10: ladvise speed: 2.64142
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.59185
Iter 5/10: OSS cache speed: 2.26443
Iter 5/10: ladvise speed: 2.61878
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.36282
Iter 6/10: OSS cache speed: 2.78942
Iter 6/10: ladvise speed: 3.00043
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.77551
Iter 7/10: OSS cache speed: 3.1709
Iter 7/10: ladvise speed: 3.04041
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.85478
Iter 8/10: OSS cache speed: 2.91337
Iter 8/10: ladvise speed: 2.97642
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.9835
Iter 9/10: OSS cache speed: 3.17384
Iter 9/10: ladvise speed: 2.94796
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.57263
Iter 10/10: OSS cache speed: 3.01503
Iter 10/10: ladvise speed: 3.09092
Average uncached read: 2.15
Average speedup with OSS cached read:  2.55 = +18%
Average speedup with ladvise willread:  2.53 = +17%
Speedup with OSS cached read less than 20%,  got 18%. Skipping ladvise willread check.
fail_loc=0