== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 08:40:46 (1775047246)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.03834 s, 20.8 MB/s
llite.lustre-ffff9ff3c8bec800.read_ahead_stats=clear
llite.lustre-ffff9ff3c8bec800.read_ahead_stats=
snapshot_time             1775047259.813623359 secs.nsecs
start_time                1775047253.016978278 secs.nsecs
elapsed_time              6.796645081 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=227801: Wed Apr  1 08:47:09 2026
  read: IOPS=13, BW=13.9MiB/s (14.6MB/s)(5120MiB/367211msec)
    clat (msec): min=41, max=223, avg=71.56, stdev=28.88
     lat (msec): min=41, max=223, avg=71.57, stdev=28.88
    clat percentiles (msec):
     |  1.00th=[   46],  5.00th=[   51], 10.00th=[   52], 20.00th=[   54],
     | 30.00th=[   56], 40.00th=[   58], 50.00th=[   61], 60.00th=[   63],
     | 70.00th=[   66], 80.00th=[   74], 90.00th=[  128], 95.00th=[  138],
     | 99.00th=[  150], 99.50th=[  161], 99.90th=[  192], 99.95th=[  220],
     | 99.99th=[  224]
   bw (  KiB/s): min= 4096, max=20480, per=100.00%, avg=14318.56, stdev=4689.11, samples=732
   iops        : min=    4, max=   20, avg=13.97, stdev= 4.58, samples=732
  lat (msec)   : 50=5.29%, 100=76.78%, 250=17.93%
  cpu          : usr=0.64%, sys=88.16%, ctx=13228, majf=5121, 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=13.9MiB/s (14.6MB/s), 13.9MiB/s-13.9MiB/s (14.6MB/s-14.6MB/s), io=5120MiB (5369MB), run=367211-367211msec