== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:39:51 (1784414391)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.86506 s, 17.9 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-ffff8c35a07f6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.03429
Iter 1/10: OSS cache speed: 2.01665
Iter 1/10: ladvise speed: 2.06775
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.13482
Iter 2/10: OSS cache speed: 1.98807
Iter 2/10: ladvise speed: 1.90986
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.56439
Iter 3/10: OSS cache speed: 1.80849
Iter 3/10: ladvise speed: 2.10829
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.08456
Iter 4/10: OSS cache speed: 2.10201
Iter 4/10: ladvise speed: 2.08998
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.99753
Iter 5/10: OSS cache speed: 1.96089
Iter 5/10: ladvise speed: 2.08684
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.89685
Iter 6/10: OSS cache speed: 1.62994
Iter 6/10: ladvise speed: 1.62473
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.79282
Iter 7/10: OSS cache speed: 1.7971
Iter 7/10: ladvise speed: 1.89637
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.7935
Iter 8/10: OSS cache speed: 1.93145
Iter 8/10: ladvise speed: 1.85701
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.8765
Iter 9/10: OSS cache speed: 1.67822
Iter 9/10: ladvise speed: 1.9554
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.86066
Iter 10/10: OSS cache speed: 1.94432
Iter 10/10: ladvise speed: 1.94598
Average uncached read: 1.90
Average speedup with OSS cached read:  1.88 = +-1%
Average speedup with ladvise willread:  1.95 = +2%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0