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[client] changed ivshmem wait timeout to avoid stalls on startup

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This commit is contained in:
Geoffrey McRae 2017-12-05 21:50:24 +11:00
parent ff81f5df64
commit 2d5b633397
3 changed files with 18 additions and 29 deletions
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10
client/ivshmem/ivshmem.c
View File

@ -478,7 +478,7 @@ bool ivshmem_process()
// ============================================================================
enum IVSHMEMWaitResult ivshmem_wait_irq(uint16_t vector)
enum IVSHMEMWaitResult ivshmem_wait_irq(uint16_t vector, unsigned int timeout)
{
if (vector > ivshmem.server.irqCount - 1)
return false;
@ -488,13 +488,13 @@ enum IVSHMEMWaitResult ivshmem_wait_irq(uint16_t vector)
FD_ZERO(&fds);
FD_SET(fd, &fds);
struct timeval timeout;
timeout.tv_sec = 1;
timeout.tv_usec = 0;
struct timeval tv;
tv.tv_sec = timeout / 1000;
tv.tv_usec = (timeout - tv.tv_sec * 1000) * 1000;
while(true)
{
int ret = select(fd+1, &fds, NULL, NULL, &timeout);
int ret = select(fd+1, &fds, NULL, NULL, &tv);
if (ret < 0)
{
if (errno == EINTR)

2
client/ivshmem/ivshmem.h
View File

@ -35,5 +35,5 @@ enum IVSHMEMWaitResult
IVSHMEM_WAIT_RESULT_ERROR
};
enum IVSHMEMWaitResult ivshmem_wait_irq(uint16_t vector);
enum IVSHMEMWaitResult ivshmem_wait_irq(uint16_t vector, unsigned int timeout);
bool ivshmem_kick_irq(uint16_t clientID, uint16_t vector);

35
client/main.c
View File

@ -154,35 +154,23 @@ inline bool areFormatsSame(const struct KVMFRHeader s1, const struct KVMFRHeader
(s1.height == s2.height );
}
inline bool waitGuest()
inline int waitGuest()
{
bool ready = false;
bool error = false;
while(state.running && !ready && !error)
while(state.running)
{
switch(ivshmem_wait_irq(0))
switch(ivshmem_wait_irq(0, (1000/30)))
{
case IVSHMEM_WAIT_RESULT_OK:
ready = true;
break;
case IVSHMEM_WAIT_RESULT_OK :
case IVSHMEM_WAIT_RESULT_TIMEOUT:
ivshmem_kick_irq(state.shm->guestID, 0);
break;
return true;
case IVSHMEM_WAIT_RESULT_ERROR:
error = true;
break;
DEBUG_ERROR("error during wait for host");
return false;
}
}
if (error)
{
DEBUG_ERROR("error during wait for host");
return false;
}
return true;
return false;
}
int renderThread(void * unused)
@ -192,16 +180,18 @@ int renderThread(void * unused)
const LG_Renderer * lgr = NULL;
void * lgrData;
unsigned int lastTicks = SDL_GetTicks();
unsigned int frameCount = 0, lastFrameCount = 0;
unsigned int frameCount = 0;
unsigned int lastFrameCount = 0;
SDL_Texture * textTexture = NULL;
SDL_Rect textRect;
while(state.running)
{
// wait for the guest to signal ready and copy the header
if (!waitGuest())
break;
++frameCount;
// we must take a copy of the header, both to let the guest advance and to
// prevent the contained arguments being abused to overflow buffers
memcpy(&header, state.shm, sizeof(struct KVMFRHeader));
@ -326,7 +316,6 @@ int renderThread(void * unused)
break;
}
++frameCount;
if (!params.showFPS)
{
SDL_RenderPresent(state.renderer);