== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 11:54:44 (1775836484)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.67183 s, 15.7 MB/s
llite.lustre-ffff91722c2c2000.read_ahead_stats=clear
llite.lustre-ffff91722c2c2000.read_ahead_stats=
snapshot_time             1775836500.525848938 secs.nsecs
start_time                1775836492.638867953 secs.nsecs
elapsed_time              7.886980985 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=229071: Fri Apr 10 12:01:54 2026
  read: IOPS=12, BW=12.5MiB/s (13.1MB/s)(5120MiB/411144msec)
    clat (msec): min=48, max=250, avg=80.12, stdev=33.31
     lat (msec): min=48, max=250, avg=80.12, stdev=33.31
    clat percentiles (msec):
     |  1.00th=[   53],  5.00th=[   58], 10.00th=[   59], 20.00th=[   62],
     | 30.00th=[   63], 40.00th=[   64], 50.00th=[   66], 60.00th=[   68],
     | 70.00th=[   73], 80.00th=[   83], 90.00th=[  138], 95.00th=[  148],
     | 99.00th=[  201], 99.50th=[  213], 99.90th=[  234], 99.95th=[  245],
     | 99.99th=[  251]
   bw (  KiB/s): min= 4096, max=18432, per=100.00%, avg=12792.50, stdev=4253.18, samples=819
   iops        : min=    4, max=   18, avg=12.48, stdev= 4.15, samples=819
  lat (msec)   : 50=0.27%, 100=81.19%, 250=18.52%, 500=0.02%
  cpu          : usr=0.64%, sys=87.17%, ctx=13858, majf=5120, minf=1305868
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=12.5MiB/s (13.1MB/s), 12.5MiB/s-12.5MiB/s (13.1MB/s-13.1MB/s), io=5120MiB (5369MB), run=411144-411144msec