== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:55:13 (1741899313)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.0365 s, 34.5 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-ffff8800b5e7b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.39959
Iter 1/10: OSS cache speed: 3.16993
Iter 1/10: ladvise speed: 2.45778
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.45694
Iter 2/10: OSS cache speed: 2.15366
Iter 2/10: ladvise speed: 1.82265
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.50834
Iter 3/10: OSS cache speed: 2.43196
Iter 3/10: ladvise speed: 2.13221
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.43441
Iter 4/10: OSS cache speed: 3.08927
Iter 4/10: ladvise speed: 2.87694
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.62474
Iter 5/10: OSS cache speed: 2.70796
Iter 5/10: ladvise speed: 2.9555
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.50793
Iter 6/10: OSS cache speed: 2.71495
Iter 6/10: ladvise speed: 3.19433
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.9956
Iter 7/10: OSS cache speed: 2.63637
Iter 7/10: ladvise speed: 3.51724
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.76658
Iter 8/10: OSS cache speed: 2.85229
Iter 8/10: ladvise speed: 3.03573
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.94068
Iter 9/10: OSS cache speed: 3.04595
Iter 9/10: ladvise speed: 3.25742
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.97007
Iter 10/10: OSS cache speed: 3.19895
Iter 10/10: ladvise speed: 3.31962
Average uncached read: 2.66
Average speedup with OSS cached read:  2.80 = +5%
Average speedup with ladvise willread:  2.85 = +7%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0