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Add prints in case of frequent GSP->CPU semaphore notifiers

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We've found that some userspace programs end up taking a legacy path
where they wait on a notification from GSP for every vblank. This change
will make nvidia.ko print out an occasional message if this path is hit
frequently. This will help us confirm/rule-out a cause of stutter.
This commit is contained in:
Milos Tijanic 2024-06-06 10:55:36 +02:00
parent e5ae570abb
commit 8c1c49b2de
1 changed files with 23 additions and 0 deletions
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23
src/nvidia/src/kernel/disp/disp_sw.c
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@ -141,8 +141,15 @@ NV_STATUS dispswReleaseSemaphoreAndNotifierFill
NvBool bFound = NV_FALSE;
NV_STATUS status;
#define PRINT_INTERVAL 3600 // At 60Hz, this will emit about once per minute.
if (flags & F_SEMAPHORE_ADDR_VALID)
{
static NvU64 counter;
if ((++counter % PRINT_INTERVAL) == 0) {
NV_PRINTF(LEVEL_ERROR, "XXXMT: NVRM debugging - F_SEMAPHORE_ADDR_VALID = %llu\n", counter);
}
bFound = CliGetDmaMappingInfo(RES_GET_CLIENT(pDevice),
RES_GET_HANDLE(pDevice),
vaSpace,
@ -154,6 +161,11 @@ NV_STATUS dispswReleaseSemaphoreAndNotifierFill
}
else if (flags & F_SEMAPHORE_RELEASE)
{
static NvU64 counter;
if ((++counter % PRINT_INTERVAL) == 0) {
NV_PRINTF(LEVEL_ERROR, "XXXMT: NVRM debugging - F_SEMAPHORE_RELEASE = %llu\n", counter);
}
status = semaphoreFillGPUVA(pGpu,
pDevice,
vaSpace,
@ -165,6 +177,11 @@ NV_STATUS dispswReleaseSemaphoreAndNotifierFill
}
else if (flags & F_NOTIFIER_FILL)
{
static NvU64 counter;
if ((++counter % PRINT_INTERVAL) == 0) {
NV_PRINTF(LEVEL_ERROR, "XXXMT: NVRM debugging - F_NOTIFIER_FILL = %llu\n", counter);
}
status = notifyFillNotifierGPUVA(pGpu,
pDevice,
vaSpace,
@ -175,5 +192,11 @@ NV_STATUS dispswReleaseSemaphoreAndNotifierFill
NV9072_NOTIFIERS_NOTIFY_ON_VBLANK /* Index */);
return status;
}
else {
static NvU64 counter;
if ((++counter % PRINT_INTERVAL) == 0) {
NV_PRINTF(LEVEL_ERROR, "XXXMT: NVRM debugging - ??? 0x%08x = %llu\n", flags, counter);
}
}
return NV9072_NOTIFICATION_STATUS_DONE_SUCCESS;
}