== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:36:05 (1788777365)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.70702 s, 15.6 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-ffff9586c35b5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.846888
Iter 1/10: OSS cache speed: 1.21915
Iter 1/10: ladvise speed: 1.33729
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.937749
Iter 2/10: OSS cache speed: 1.05354
Iter 2/10: ladvise speed: 1.18158
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.958999
Iter 3/10: OSS cache speed: 1.07851
Iter 3/10: ladvise speed: 1.25893
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.27384
Iter 4/10: OSS cache speed: 1.32859
Iter 4/10: ladvise speed: 1.24993
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.18897
Iter 5/10: OSS cache speed: 0.991732
Iter 5/10: ladvise speed: 0.967718
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.986098
Iter 6/10: OSS cache speed: 0.987815
Iter 6/10: ladvise speed: 1.01755
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.0075
Iter 7/10: OSS cache speed: 1.17669
Iter 7/10: ladvise speed: 0.810762
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.627772
Iter 8/10: OSS cache speed: 0.781144
Iter 8/10: ladvise speed: 0.839317
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.699331
Iter 9/10: OSS cache speed: 0.843406
Iter 9/10: ladvise speed: 0.791955
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.69544
Iter 10/10: OSS cache speed: 0.92124
Iter 10/10: ladvise speed: 1.01745
Average uncached read: .92
Average speedup with OSS cached read:  1.03 = +11%
Average speedup with ladvise willread:  1.04 = +13%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0