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mcexec: --mpol-threshold to control MPOL_BIND/MPOL_PREFERRED

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This commit is contained in:
Balazs Gerofi
2017-02-08 21:49:25 +09:00
parent b4aecfd43c
commit 26b9484bae
8 changed files with 23 additions and 7 deletions
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3
kernel/host.c
View File

@@ -129,7 +129,7 @@ int prepare_process_ranges_args_envs(struct thread *thread,
/* Non-TEXT sections that are large respect user allocation policy
* unless user explicitly requests otherwise */
if (i >= 1 && pn->sections[i].len >= AP_USER_THRESHOLD &&
if (i >= 1 && pn->sections[i].len >= pn->mpol_threshold &&
!(pn->mpol_flags & MPOL_NO_BSS)) {
dkprintf("%s: section: %d size: %d pages -> IHK_MC_AP_USER\n",
__FUNCTION__, i, range_npages);
@@ -429,6 +429,7 @@ static int process_msg_prepare_process(unsigned long rphys)
proc->fsgid = pn->cred[7];
proc->termsig = SIGCHLD;
proc->mpol_flags = pn->mpol_flags;
proc->mpol_threshold = pn->mpol_threshold;
vm->region.user_start = pn->user_start;
vm->region.user_end = pn->user_end;

1
kernel/include/process.h
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@@ -555,6 +555,7 @@ struct process {
long maxrss_children;
/* Memory policy flags */
unsigned long mpol_flags;
size_t mpol_threshold;
// perf_event
int perf_status;

1
kernel/include/syscall.h
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@@ -193,6 +193,7 @@ struct program_load_desc {
struct rlimit rlimit[MCK_RLIM_MAX];
unsigned long interp_align;
unsigned long mpol_flags;
unsigned long mpol_threshold;
char shell_path[SHELL_PATH_MAX_LEN];
__cpu_set_unit cpu_set[PLD_CPU_SET_SIZE];
struct program_image_section sections[0];

3
kernel/process.c
View File

@@ -93,6 +93,7 @@ init_process(struct process *proc, struct process *parent)
proc->sgid = parent->sgid;
proc->fsgid = parent->fsgid;
proc->mpol_flags = parent->mpol_flags;
proc->mpol_threshold = parent->mpol_threshold;
memcpy(proc->rlimit, parent->rlimit,
sizeof(struct rlimit) * MCK_RLIM_MAX);
}
@@ -1928,7 +1929,7 @@ int init_process_stack(struct thread *thread, struct program_load_desc *pn,
/* Apply user allocation policy to stacks */
/* TODO: make threshold kernel or mcexec argument */
ap_flag = (size >= AP_USER_THRESHOLD &&
ap_flag = (size >= proc->mpol_threshold &&
!(proc->mpol_flags & MPOL_NO_STACK)) ? IHK_MC_AP_USER : 0;
dkprintf("%s: size: %lu %s\n", __FUNCTION__, size,
ap_flag ? "(IHK_MC_AP_USER)" : "");

2
kernel/syscall.c
View File

@@ -1430,7 +1430,7 @@ do_mmap(const intptr_t addr0, const size_t len0, const int prot,
/* Small allocations mostly benefit from closest RAM,
* otherwise follow user requested policy */
unsigned long ap_flag =
(!(flags & MAP_STACK) && len >= AP_USER_THRESHOLD) ||
(!(flags & MAP_STACK) && len >= thread->proc->mpol_threshold) ||
((flags & MAP_STACK) && !(thread->proc->mpol_flags & MPOL_NO_STACK)) ?
IHK_MC_AP_USER : 0;