diff options
| author | Einar Lueck <elelueck@de.ibm.com> | 2011-11-14 21:31:16 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-16 17:28:20 -0500 |
| commit | 0284a0fdf3def1beb4de509f87472520b23883c9 (patch) | |
| tree | 012a6a380508f4b0214746d147bbc1aba6e32a51 /drivers/s390 | |
| parent | 1d36cb479f204a0fedc1a3e7ce7b32c0a2c48769 (diff) | |
qeth: Reduce CPU consumption through less SIGA-r calls
Patch avoids SIGA-r calls in case of SIGA-r required. It only calls
SIGA-r if a threshold of free buffer is reached. CPU consumption is
reduced as a consequence.
Signed-off-by: Einar Lueck <elelueck@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index b77c65ed1381..4abc79d3963f 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h | |||
| @@ -236,8 +236,7 @@ static inline int qeth_is_ipa_enabled(struct qeth_ipa_info *ipa, | |||
| 236 | #define QETH_IN_BUF_COUNT_MAX 128 | 236 | #define QETH_IN_BUF_COUNT_MAX 128 |
| 237 | #define QETH_MAX_BUFFER_ELEMENTS(card) ((card)->qdio.in_buf_size >> 12) | 237 | #define QETH_MAX_BUFFER_ELEMENTS(card) ((card)->qdio.in_buf_size >> 12) |
| 238 | #define QETH_IN_BUF_REQUEUE_THRESHOLD(card) \ | 238 | #define QETH_IN_BUF_REQUEUE_THRESHOLD(card) \ |
| 239 | ((card)->ssqd.qdioac1 & AC1_SIGA_INPUT_NEEDED ? 1 : \ | 239 | ((card)->qdio.in_buf_pool.buf_count / 2) |
| 240 | ((card)->qdio.in_buf_pool.buf_count / 2)) | ||
| 241 | 240 | ||
| 242 | /* buffers we have to be behind before we get a PCI */ | 241 | /* buffers we have to be behind before we get a PCI */ |
| 243 | #define QETH_PCI_THRESHOLD_A(card) ((card)->qdio.in_buf_pool.buf_count+1) | 242 | #define QETH_PCI_THRESHOLD_A(card) ((card)->qdio.in_buf_pool.buf_count+1) |