== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:43:30 (1773236610)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.56066 s, 18.9 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-ffff9f90d0917000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.84838
Iter 1/10: OSS cache speed: 2.31093
Iter 1/10: ladvise speed: 2.10405
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.85835
Iter 2/10: OSS cache speed: 2.14989
Iter 2/10: ladvise speed: 1.9395
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.66099
Iter 3/10: OSS cache speed: 2.09747
Iter 3/10: ladvise speed: 2.10739
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.10752
Iter 4/10: OSS cache speed: 2.59667
Iter 4/10: ladvise speed: 2.60051
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.43572
Iter 5/10: OSS cache speed: 2.76833
Iter 5/10: ladvise speed: 2.3963
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.43967
Iter 6/10: OSS cache speed: 2.39825
Iter 6/10: ladvise speed: 2.40312
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.14691
Iter 7/10: OSS cache speed: 2.39756
Iter 7/10: ladvise speed: 2.54611
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.2928
Iter 8/10: OSS cache speed: 2.59703
Iter 8/10: ladvise speed: 2.45516
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.47411
Iter 9/10: OSS cache speed: 2.73421
Iter 9/10: ladvise speed: 2.54649
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.37146
Iter 10/10: OSS cache speed: 2.58713
Iter 10/10: ladvise speed: 2.55676
Average uncached read: 2.16
Average speedup with OSS cached read:  2.46 = +13%
Average speedup with ladvise willread:  2.36 = +9%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0